Trough feeder
Publish: 2021-04-15 17:49:24
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2. There should be, but Anshan mining machinery is sure to proce all kinds of vibrating screen.
3.
1、 Preparation and inspection before operation
2. Whether the lubricating oil of the gearbox reaches the oil mark
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6. Whether the V-belt is damaged
7. Whether the tank body is worn out or damaged
8. Whether the safety devices such as belt cover are firm
9. Whether the pointer of ammeter is at zero
10. Whether all switches and buttons are in good condition< 2. Operation method
1. Start up operation method
(1) before operation, it must be checked item by item according to the inspection content before start-up
(2) get ready to start after hearing the start signal
(3) close the switch and start the operation button
2. Stop method
(1) stop the mine only after the ore in the ore bin has been fully supplied
(2) press the stop button of feeder operation
(3) turn off the power switch
(1) pull down the switch immediately in case of power failure or emergency stop without notice
4. Silicomanganese alloy slag is a kind of solid waste proced in smelting silicomanganese alloy. Its color is light green and its hardness is large. A certain amount of silicomanganese alloy particles are embedded in it. If these solid waste slag are not treated scientifically and effectively in time, it will not only occupy land, but also cause certain harm to human health and environment
recycling of silicon manganese alloy particles can not only obtain high economic benefits in a short time, but also have a certain protective effect on the environment, which can kill two birds with one stone. How about the process of recovering Si Mn alloy? According to years of practice and experience of silicon manganese alloy recovery, Gongyi hi tech machinery plant has summarized a set of practical process
because the specific gravity of the silicon manganese alloy particles is larger than that of the waste slag (that is, the weight of the silicon manganese alloy particles with the same volume is larger than that of the waste slag), the silicon manganese alloy can be separated by gravity separation method, and good separation effect can be obtained. But before separation, the slag must be broken to break the intergrowth structure between silicon manganese alloy particles and slag. The higher the degree of dissociation, the better the effect of gravity separation. The specific process is for reference only
the silicomanganese alloy slag is evenly fed into jaw crusher through trough feeder to crush large silicomanganese alloy slag into small particles of 0-5mm, which are then sent to rod mill for grinding by belt conveyor to fully separate the monomers of silicomanganese alloy slag, and the ground slag is sent to gravity separation equipment for separation, (jigging machine is generally selected as the gravity separation equipment here. Compared with shaker and other gravity separation equipment, jigging machine can continuously feed ore with large processing capacity and good separation effect) silicon manganese alloy granular concentrate and waste resie can be obtained
the silicon manganese alloy particles can be sold to the silicon manganese alloy smelter again, and the waste slag can be sold to the new building materials and equipment factory for use as the raw materials of new building materials. In this way, the waste resie of Si Mn alloy has been almost completely recycled, which can not only protect the environment, but also obtain high economic value. It has become a hot instry for short-term investment
Gongyi Xiaoyi hi tech machinery factory is a professional design and manufacturing enterprise of complete set of mineral processing equipment and drying equipment in China. It has been adhering to the principle of "people-oriented, scientific and technological innovation". By the majority of customers favor. Over the years, we have been providing high-quality ball mills, magnetic separators and dryers for customers at home and abroad. We are not only committed to the research and development of various mineral processing equipment, but also have rich experience in the treatment and recovery process of various instrial wastes!
recycling of silicon manganese alloy particles can not only obtain high economic benefits in a short time, but also have a certain protective effect on the environment, which can kill two birds with one stone. How about the process of recovering Si Mn alloy? According to years of practice and experience of silicon manganese alloy recovery, Gongyi hi tech machinery plant has summarized a set of practical process
because the specific gravity of the silicon manganese alloy particles is larger than that of the waste slag (that is, the weight of the silicon manganese alloy particles with the same volume is larger than that of the waste slag), the silicon manganese alloy can be separated by gravity separation method, and good separation effect can be obtained. But before separation, the slag must be broken to break the intergrowth structure between silicon manganese alloy particles and slag. The higher the degree of dissociation, the better the effect of gravity separation. The specific process is for reference only
the silicomanganese alloy slag is evenly fed into jaw crusher through trough feeder to crush large silicomanganese alloy slag into small particles of 0-5mm, which are then sent to rod mill for grinding by belt conveyor to fully separate the monomers of silicomanganese alloy slag, and the ground slag is sent to gravity separation equipment for separation, (jigging machine is generally selected as the gravity separation equipment here. Compared with shaker and other gravity separation equipment, jigging machine can continuously feed ore with large processing capacity and good separation effect) silicon manganese alloy granular concentrate and waste resie can be obtained
the silicon manganese alloy particles can be sold to the silicon manganese alloy smelter again, and the waste slag can be sold to the new building materials and equipment factory for use as the raw materials of new building materials. In this way, the waste resie of Si Mn alloy has been almost completely recycled, which can not only protect the environment, but also obtain high economic value. It has become a hot instry for short-term investment
Gongyi Xiaoyi hi tech machinery factory is a professional design and manufacturing enterprise of complete set of mineral processing equipment and drying equipment in China. It has been adhering to the principle of "people-oriented, scientific and technological innovation". By the majority of customers favor. Over the years, we have been providing high-quality ball mills, magnetic separators and dryers for customers at home and abroad. We are not only committed to the research and development of various mineral processing equipment, but also have rich experience in the treatment and recovery process of various instrial wastes!
5. The main equipment includes:
1. Crushing equipment: crusher, belt conveyor, feeder, and some screening equipment< Grinding equipment: feeder, belt conveyor, ball mill or rod mill, spiral classifier or cyclone, sand pump, etc
3. Flotation equipment: flotation machine is generally used, and some use flotation column
4. Concentrate concentration and filtration equipment: generally thickener, filter, etc., most of which are also equipped with sand pump
5. Water supply equipment: water pump, high level pool, etc
6. Tailings transportation and storage: tailings pump and pipeline, tailings pond, backwater recovery equipment, etc
7. Maintenance equipment: it depends on the specific situation<
copper ore beneficiation process:
the flotation of disseminated copper ore generally adopts a relatively simple process. After one-stage grinding, the fineness of - 200 mesh accounts for about 50% ~ 70%, one roughing, two to three cleaning and one to two scavenging. If the disseminated particle size of copper mineral is relatively fine, the stage grinding process can be considered. Most of the concentrators dealing with bornite adopt the stage grinding and separation process of regrinding and cleaning of coarse concentrate, which is essentially a mixed preferential flotation process. High grade copper concentrate and sulfur concentrate are obtained by first roughing, roughing and scavenging, then regrinding and cleaning. Coarse grinding fineness - 200 mesh accounts for about 45% ~ 50%, regrinding fineness - 200 mesh accounts for about 90% ~ 95%
because chalrite and pyrite are closely associated in dense copper ore, pyrite is often activated by secondary copper minerals, and pyrite content is high, which is difficult to inhibit and separate. In the separation process, copper concentrate and sulfur concentrate should be obtained simultaneously. Usually, the tailings after copper concentration is sulfur concentrate. If the gangue content in ore is more than 20% ~ 25%, it needs to be separated again to get sulfur concentrate. Two stage grinding or stage grinding is often used to treat dense copper ore, and the grinding fineness is required to be fine. The dosage of xanthate is more than 100g / (t raw ore) and lime is more than 8 ~ 10kg (t raw ore).
1. Crushing equipment: crusher, belt conveyor, feeder, and some screening equipment< Grinding equipment: feeder, belt conveyor, ball mill or rod mill, spiral classifier or cyclone, sand pump, etc
3. Flotation equipment: flotation machine is generally used, and some use flotation column
4. Concentrate concentration and filtration equipment: generally thickener, filter, etc., most of which are also equipped with sand pump
5. Water supply equipment: water pump, high level pool, etc
6. Tailings transportation and storage: tailings pump and pipeline, tailings pond, backwater recovery equipment, etc
7. Maintenance equipment: it depends on the specific situation<
copper ore beneficiation process:
the flotation of disseminated copper ore generally adopts a relatively simple process. After one-stage grinding, the fineness of - 200 mesh accounts for about 50% ~ 70%, one roughing, two to three cleaning and one to two scavenging. If the disseminated particle size of copper mineral is relatively fine, the stage grinding process can be considered. Most of the concentrators dealing with bornite adopt the stage grinding and separation process of regrinding and cleaning of coarse concentrate, which is essentially a mixed preferential flotation process. High grade copper concentrate and sulfur concentrate are obtained by first roughing, roughing and scavenging, then regrinding and cleaning. Coarse grinding fineness - 200 mesh accounts for about 45% ~ 50%, regrinding fineness - 200 mesh accounts for about 90% ~ 95%
because chalrite and pyrite are closely associated in dense copper ore, pyrite is often activated by secondary copper minerals, and pyrite content is high, which is difficult to inhibit and separate. In the separation process, copper concentrate and sulfur concentrate should be obtained simultaneously. Usually, the tailings after copper concentration is sulfur concentrate. If the gangue content in ore is more than 20% ~ 25%, it needs to be separated again to get sulfur concentrate. Two stage grinding or stage grinding is often used to treat dense copper ore, and the grinding fineness is required to be fine. The dosage of xanthate is more than 100g / (t raw ore) and lime is more than 8 ~ 10kg (t raw ore).
6. Mining machinery is directly used for mineral mining and enrichment operations. Including mining machinery and mineral processing machinery
mining machinery: mechanical equipment used for direct mining of useful minerals and mining preparation work, including mining machinery for mining metal ores and non-metal ores; Coal mining machinery for mining coal; Petroleum drilling and proction machinery for oil exploitation
mineral processing machinery: mineral processing is the process of selecting useful minerals from the collected mineral raw materials according to the differences in physical, physical and chemical properties of various minerals. The process is called mineral processing machinery. According to the beneficiation process, beneficiation machinery is divided into crushing, grinding, screening, separation (separation) and dewatering machinery.
mining machinery: mechanical equipment used for direct mining of useful minerals and mining preparation work, including mining machinery for mining metal ores and non-metal ores; Coal mining machinery for mining coal; Petroleum drilling and proction machinery for oil exploitation
mineral processing machinery: mineral processing is the process of selecting useful minerals from the collected mineral raw materials according to the differences in physical, physical and chemical properties of various minerals. The process is called mineral processing machinery. According to the beneficiation process, beneficiation machinery is divided into crushing, grinding, screening, separation (separation) and dewatering machinery.
7. Practice summary of Laigang
the training in Laigang is coming to an end. Now I will make a systematic summary of my study in the past three months. This paper mainly introces the following key contents: brief introction of sintering workshop, start-up scheme of sintering workshop, maintenance start-up and stop operation, analysis and treatment of typical and common accidents, main contents of pyrotechnics and other posts, new sintering process, etc<
I. Introction of sintering workshop
Fig. 1 shows the whole picture of sintering workshop
Fig. 1 sintering proction is a process of exhaust sintering, that is, mixing ore, flux, fuel, st ash and return ore according to a certain proportion, adding appropriate amount of water, mixing and pelleting by mixer, laying on sintering trolley, and igniting under a certain negative pressure, The whole sintering process is carried out from top to bottom under 9.8-17.0 kPa negative pressure
the sintering workshop includes mixing system, cooling system, main exhaust system, fuel crushing system, finished proct screening system, st removal and bulk material system, etc. Laiwu Steel 265m2 sintering machine is a 3200m-179; Supporting system of new blast furnace. The designed utilization coefficient is 1.25 T / h.m2, the calendar operation rate of equipment is 92%, and the annual output of high basicity sinter is 4.3821 million tons. The main equipment is 148 pieces of 5 × one point five × 72m single trolley, 520 M2 annular cooling trolley (equipped with 5 fans for sectional air blowing), 2 mixers, 2 sets of North-South screening systems (the screen mesh is divided into 5, 10 and 20mm levels), etc<
Fig. 2 sintering process
Fig. 2, sintering process introction: proportioning (blending ore + fuel + quicklime dolomite + st ash + return ore) → primary mixer (blending) → secondary mixer (pelletizing) → mixing silo, Bedding material (10-20 mm) → sintering trolley → negative pressure ignition sintering (2 rows of 27 burners in total) → look around cooler (speed ratio to trolley is 1.25) → plate feeder (made of steel plate to prevent grinding damage and prolong service life) → screening system (one screen 20 mm, two screens 5 mm, three screens 10 mm) → to blast furnace slow storage through Z8< Second, sintering workshop start-up plan
first of all, preparation must be made before start-up. Personnel (commander and operator) must be in place; Safety (gas and fire fighting, etc.) must be qualified; Energy supply (water, electricity, gas and raw materials) must be stable and reliable< After the preparation work is completed, the start-up is divided into four steps:
I) single equipment commissioning: through clearance operation and continuous operation, check whether the single equipment can achieve all the functions required by the design under no-load
2) equipment linkage test run: it can be divided into single linkage test run and large linkage test run. The purpose is to assess the linkage requirements required by equipment proction and ensure the reliability and safety of equipment operation< (3) cold load test: at this time, there is no need to ignite and sinter, just check whether the material flow is smooth in the main process, and test the total processing time of the whole process. Let the material fill the chute and funnel of each part to form a dead material protective layer. The reliability of equipment, program and interlock is further tested by cold continuous operation. And can adjust the parameters of equipment and instrument< (4) thermal load test run: the test run is prepared for formal proction, including whether the fuel crushing system can supply qualified fuel in time and meet the process requirements, the accuracy of batching scale and water meter of mixing system, the igniter effect of sintering cooling system, the adjustment of thermal expansion gap and process parameters of trolley, and the smoothness of finished proct screening system
since there is no bedding material in the new workshop, it is necessary to start without bedding material. At this time, it is very easy to stick to the trolley accident. The key points of preventing sticking to the trolley are as follows: 1. The sintering machine material layer should be controlled at 650-700mm, and the pressing operation should not be carried out. 2. Properly rece the fuel ratio (coal ratio reced by 0.2-0.4). 3. The nine roller speed should be reced to prevent the large particle fuel from reaching the bottom of the bed. 4. The sintering end point is controlled at the last air box of the tail, and there is 10-20 mm raw material in the tail section. 5. A special person shall be assigned at the tail of the machine to deal with the sticky material found on the trolley in time (cold water can be applied to the castor bar of the second floor trolley, and the trolley can be vibrated). 6. Ensure the normal operation of the five blowers< During the three-month internship, I have experienced two overhauls (one is the planned overhaul on September 25, and the other is the unplanned overhaul on October 24). The shutdown operation and overhaul key points are summarized as follows:
shutdown: 1. Inform the raw materials in advance to cut off, central control to stop the batching system (emergency stop type), and the 1H-1 belt will stop automatically when the material is empty. 2. Stop mixing system (forward stop type), primary mixer, 2h-1 belt, secondary mixer and Z4 belt stop with empty material in turn, the whole process is about 25 minutes. When parking, a special person should be assigned here to pay close attention to the moisture change in the mixer and adjust the water addition in time. And for the convenience of maintenance and cleaning after stopping, the belt to be replaced and the mixer to be cleaned should be stopped at the designated position. 3. Because the mixing bin is not feeding at this time, the material level of the bin will slowly decrease. Depending on the material level of the mixing bin, graally rece the machine speed so that the material can be spread over the trolley and the mixing bin can be emptied. 4. After the mixture bin is emptied, stop the nine rollers and round rollers, and turn off the gas after the charging trolley goes out of the ignition furnace (first, the central control adjusts the small gas valve, and then the ball valve and pull rod valve are closed on site in turn, the central control closes the gas shut-off valve and regulating valve, opens the gas pipe end to release, carries out nitrogen purging, and turns off the gas eye valve to seal the gas). 5. Turn off the flap valve of the lower air box of the trolley in turn with the unloading trolley. At this time, the mixing system can be opened to enter the mixing bin, and the return ore can be used as a stepping stone to clean the upper part of the bin, so as to ensure the safety of personnel and prevent falling down the bottom of the bin. 6. When the trolley is empty, the sintering machine and the annular cooler stop the sintering trolley without linkage, and open the cooling air valve to cool the trolley, so as to achieve the purpose of cooling and rapid maintenance of the trolley. 7. Stop the ring cooler after the feed passes through the ring cooler, and stop the blower after more than ten minutes. 8. Stop the screening system after the screening of sinter. The on-site personnel set the switch on the operation post to the zero position. 9. Shut down the water pump, st removal and main exhaust fan after the air valve is opened to the minimum (12%) for one hour. 10. When the power is cut off and the maintenance is carried out, the lighting voltage used for maintenance must be safety voltage. The parking is finished
the main contents of maintenance are: 1. Replace the idler, replace the belt; 2. Clean the mixer and mixing bin; 3. Change the trolley and arrange the castor strips; 4. Maintain the fan and finished proct equipment
driving: 1. Inform the on-site personnel to prepare for driving and pay attention to safety. 2. When the power is on, the operator will turn the switch to the automatic position. 3. Start the water pump. 4. Start the main exhaust fan (two fans are started at intervals of about 20 minutes, and the damper is fully closed when starting). 5. Start ignition fan and combustion fan. 6. Nitrogen cleaning, gas introction and blasting experiment (see Annex 1 for details). After qualified, ignite the ignition burners on both sides. 7. Start the ring cooling blower (when starting, the damper is fully closed, and 5 sets are started one by one), and start the st removal system. 8. Start the finished proct screening system. 9. Open bulk material system. 10. Set the ratio, moisture content, machine speed and other process parameters to start mixing. 11. Add water according to the situation of the material into the mixer to prevent wet material and dry material. 12. When the material level in the mixing bin reaches 20-30, open the round roller, nine roller, bedding material and mixture, and drive the sintering trolley (the machine speed starts to slow down about 1.5m / min). 13. Synchronize with 12 to ignite the main burner. The gas and air flow increases slowly, and the air coal ratio is 4.7. 14. Pneumatic ash conveying system. The fuel crushing system is a separate part, depending on the level of fuel bunker. So far, the driving is over< 4. Analysis and treatment of typical and common accidents
1. Change the trolley
1. If the pyrotechnics find that the trolley wheel is damaged, the trolley baffle or heat insulation pad is damaged, and the trolley must be replaced, the workshop, central control and maintenance personnel shall be informed immediately. 2. Determine the number of the broken trolley at the head and tail of the machine. 3. When the crown block is in place, the spare trolley and necessary tools shall be prepared and placed at the rear of the machine. 4. When the trolley needs to be changed to pass through the round roller distributor, stop the round roller so that the trolley needs to be changed and the front and rear half of the trolley does not distribute. 5. By speeding up the speed or recing the comprehensive feeding amount in advance, the material level of the mixing bin is controlled at the low limit. 6. When the car needs to be changed out of the ignition furnace, close and open the flap valve of the bellows in turn to rece air leakage. 7. When the truck needs to be changed and it is close to the 21 ° bellows, the mixing system shall be stopped in advance. As far as possible, the mixing silo shall be discharged to prevent material sticking. 8. Stop at the left and right of 22 ° bellows and close several bellows flap valves nearby. 9. At the same time, the gas volume should be reced, as long as the fire can burn. 10. The crane hoists the broken trolley away (at this time, the castor bar is needed to block the wheels of the front and rear trolley) and replaces it with the standby trolley. 11. Turn up gas, start mixing, roll and trolley
2. Replace the castor bar
1. When it is found at the head and tail of the initiating explosive device or judged by the central control through the computer screen, confirm on site. 2. Prepare new castor strips and put them on the machine head. 3. Because it takes 100 minutes for the trolley to turn around, confirm the number of the trolley first, wait for it to turn to the head, stop the trolley, turn down the gas, and rece the total feeding amount a few minutes in advance. 4. Pull out the pressing block and plug of castor bar, and install the castor bar again. 5. Start up, turn on the gas, and the feeding quantity returns to normal
3. Red run material treatment
Red run material refers to the situation that the material is not fully burned on the sintering trolley and continues to burn when it falls onto the annular cooler (out of the annular cooling flue gas hood). At this time, 1. The speed of the circular cooler should be reced appropriately to make the sinter get more cooling time, but the ratio of the speed of the circular cooler to the speed of the trolley should not be less than 1.25. The speed of annular cooler should not be lower than 200R / min. 2. Turn on the tap at the curved rail to draw water for the material layer of the ring cooling car, and pay attention to the amount of water, because too much water will have a negative impact on the sinter pulverization performance. 3. Adjust the speed of plate feeder properly to prevent red ore from burning Z3 belt. 4. When there is still red material, you can also draw water on Z3. 5. At this time, the return ore will increase, so it is necessary to prevent the return ore fluctuation from affecting the second round fluctuation. 6. Analyze and summarize the cause of the accident in time
4. Wet material handling of the primary mixer
1. Turn off the water adding switch of the secondary mixer immediately. 2. Find out the reason and adjust the moisture rate setting value in time to ensure the moisture stability. 3. The tail of 2h-1 machine is marked to prevent the belt from pressing material e to excessive moisture. 4. According to the wet material time to rece the amount of comprehensive feeding, the longer the time, the greater the range. 5. Speed up the sintering trolley appropriately, control the lower limit of the material level of the mixing bin as far as possible, and prevent the wet material from entering the bin. 6. Bottom layer sintering. 7. The unloading level should also be kept low to prevent material sticking. 8. Wet material can't be put into the bedding material to prevent adhesion
5. Belt deviation adjustment
when belt deviation occurs, after the belt contacts the deviation detector, the deviation of the contact roller of the deviation detector reaches 30% °， The micro switch in the detector acts to stop the belt conveyor in linkage operation. 1. Generally, the head pulley is not adjusted when the belt deviates. When the belt deviates at the tail, the tail pulley is adjusted according to the forward direction of the belt. 2. When the belt deviates from the outer side of the upper idler, the upper idler frame moves according to the belt forward direction (the standing side is the inner side). 3. When the belt deviates from the outer side of the upper idler, the upper idler shall be adjusted in the opposite direction of the forward direction. 4. When the belt is too thin or stretched and deviates, adjust the tensioning device. 5. Due to improper cementation, re cementation is needed
6. Operation in case of coal breaking
1. Find out the reasons in time, such as the weighing belt slipping, no feeding, blanking funnel blocked, and deal with and adjust in time. 2. When the material is ready to leave the ring cooler, the comprehensive feeding amount is greatly reced. 3. When the plate feeder is discharged, the sintering rate is greatly reced
the training in Laigang is coming to an end. Now I will make a systematic summary of my study in the past three months. This paper mainly introces the following key contents: brief introction of sintering workshop, start-up scheme of sintering workshop, maintenance start-up and stop operation, analysis and treatment of typical and common accidents, main contents of pyrotechnics and other posts, new sintering process, etc<
I. Introction of sintering workshop
Fig. 1 shows the whole picture of sintering workshop
Fig. 1 sintering proction is a process of exhaust sintering, that is, mixing ore, flux, fuel, st ash and return ore according to a certain proportion, adding appropriate amount of water, mixing and pelleting by mixer, laying on sintering trolley, and igniting under a certain negative pressure, The whole sintering process is carried out from top to bottom under 9.8-17.0 kPa negative pressure
the sintering workshop includes mixing system, cooling system, main exhaust system, fuel crushing system, finished proct screening system, st removal and bulk material system, etc. Laiwu Steel 265m2 sintering machine is a 3200m-179; Supporting system of new blast furnace. The designed utilization coefficient is 1.25 T / h.m2, the calendar operation rate of equipment is 92%, and the annual output of high basicity sinter is 4.3821 million tons. The main equipment is 148 pieces of 5 × one point five × 72m single trolley, 520 M2 annular cooling trolley (equipped with 5 fans for sectional air blowing), 2 mixers, 2 sets of North-South screening systems (the screen mesh is divided into 5, 10 and 20mm levels), etc<
Fig. 2 sintering process
Fig. 2, sintering process introction: proportioning (blending ore + fuel + quicklime dolomite + st ash + return ore) → primary mixer (blending) → secondary mixer (pelletizing) → mixing silo, Bedding material (10-20 mm) → sintering trolley → negative pressure ignition sintering (2 rows of 27 burners in total) → look around cooler (speed ratio to trolley is 1.25) → plate feeder (made of steel plate to prevent grinding damage and prolong service life) → screening system (one screen 20 mm, two screens 5 mm, three screens 10 mm) → to blast furnace slow storage through Z8< Second, sintering workshop start-up plan
first of all, preparation must be made before start-up. Personnel (commander and operator) must be in place; Safety (gas and fire fighting, etc.) must be qualified; Energy supply (water, electricity, gas and raw materials) must be stable and reliable< After the preparation work is completed, the start-up is divided into four steps:
I) single equipment commissioning: through clearance operation and continuous operation, check whether the single equipment can achieve all the functions required by the design under no-load
2) equipment linkage test run: it can be divided into single linkage test run and large linkage test run. The purpose is to assess the linkage requirements required by equipment proction and ensure the reliability and safety of equipment operation< (3) cold load test: at this time, there is no need to ignite and sinter, just check whether the material flow is smooth in the main process, and test the total processing time of the whole process. Let the material fill the chute and funnel of each part to form a dead material protective layer. The reliability of equipment, program and interlock is further tested by cold continuous operation. And can adjust the parameters of equipment and instrument< (4) thermal load test run: the test run is prepared for formal proction, including whether the fuel crushing system can supply qualified fuel in time and meet the process requirements, the accuracy of batching scale and water meter of mixing system, the igniter effect of sintering cooling system, the adjustment of thermal expansion gap and process parameters of trolley, and the smoothness of finished proct screening system
since there is no bedding material in the new workshop, it is necessary to start without bedding material. At this time, it is very easy to stick to the trolley accident. The key points of preventing sticking to the trolley are as follows: 1. The sintering machine material layer should be controlled at 650-700mm, and the pressing operation should not be carried out. 2. Properly rece the fuel ratio (coal ratio reced by 0.2-0.4). 3. The nine roller speed should be reced to prevent the large particle fuel from reaching the bottom of the bed. 4. The sintering end point is controlled at the last air box of the tail, and there is 10-20 mm raw material in the tail section. 5. A special person shall be assigned at the tail of the machine to deal with the sticky material found on the trolley in time (cold water can be applied to the castor bar of the second floor trolley, and the trolley can be vibrated). 6. Ensure the normal operation of the five blowers< During the three-month internship, I have experienced two overhauls (one is the planned overhaul on September 25, and the other is the unplanned overhaul on October 24). The shutdown operation and overhaul key points are summarized as follows:
shutdown: 1. Inform the raw materials in advance to cut off, central control to stop the batching system (emergency stop type), and the 1H-1 belt will stop automatically when the material is empty. 2. Stop mixing system (forward stop type), primary mixer, 2h-1 belt, secondary mixer and Z4 belt stop with empty material in turn, the whole process is about 25 minutes. When parking, a special person should be assigned here to pay close attention to the moisture change in the mixer and adjust the water addition in time. And for the convenience of maintenance and cleaning after stopping, the belt to be replaced and the mixer to be cleaned should be stopped at the designated position. 3. Because the mixing bin is not feeding at this time, the material level of the bin will slowly decrease. Depending on the material level of the mixing bin, graally rece the machine speed so that the material can be spread over the trolley and the mixing bin can be emptied. 4. After the mixture bin is emptied, stop the nine rollers and round rollers, and turn off the gas after the charging trolley goes out of the ignition furnace (first, the central control adjusts the small gas valve, and then the ball valve and pull rod valve are closed on site in turn, the central control closes the gas shut-off valve and regulating valve, opens the gas pipe end to release, carries out nitrogen purging, and turns off the gas eye valve to seal the gas). 5. Turn off the flap valve of the lower air box of the trolley in turn with the unloading trolley. At this time, the mixing system can be opened to enter the mixing bin, and the return ore can be used as a stepping stone to clean the upper part of the bin, so as to ensure the safety of personnel and prevent falling down the bottom of the bin. 6. When the trolley is empty, the sintering machine and the annular cooler stop the sintering trolley without linkage, and open the cooling air valve to cool the trolley, so as to achieve the purpose of cooling and rapid maintenance of the trolley. 7. Stop the ring cooler after the feed passes through the ring cooler, and stop the blower after more than ten minutes. 8. Stop the screening system after the screening of sinter. The on-site personnel set the switch on the operation post to the zero position. 9. Shut down the water pump, st removal and main exhaust fan after the air valve is opened to the minimum (12%) for one hour. 10. When the power is cut off and the maintenance is carried out, the lighting voltage used for maintenance must be safety voltage. The parking is finished
the main contents of maintenance are: 1. Replace the idler, replace the belt; 2. Clean the mixer and mixing bin; 3. Change the trolley and arrange the castor strips; 4. Maintain the fan and finished proct equipment
driving: 1. Inform the on-site personnel to prepare for driving and pay attention to safety. 2. When the power is on, the operator will turn the switch to the automatic position. 3. Start the water pump. 4. Start the main exhaust fan (two fans are started at intervals of about 20 minutes, and the damper is fully closed when starting). 5. Start ignition fan and combustion fan. 6. Nitrogen cleaning, gas introction and blasting experiment (see Annex 1 for details). After qualified, ignite the ignition burners on both sides. 7. Start the ring cooling blower (when starting, the damper is fully closed, and 5 sets are started one by one), and start the st removal system. 8. Start the finished proct screening system. 9. Open bulk material system. 10. Set the ratio, moisture content, machine speed and other process parameters to start mixing. 11. Add water according to the situation of the material into the mixer to prevent wet material and dry material. 12. When the material level in the mixing bin reaches 20-30, open the round roller, nine roller, bedding material and mixture, and drive the sintering trolley (the machine speed starts to slow down about 1.5m / min). 13. Synchronize with 12 to ignite the main burner. The gas and air flow increases slowly, and the air coal ratio is 4.7. 14. Pneumatic ash conveying system. The fuel crushing system is a separate part, depending on the level of fuel bunker. So far, the driving is over< 4. Analysis and treatment of typical and common accidents
1. Change the trolley
1. If the pyrotechnics find that the trolley wheel is damaged, the trolley baffle or heat insulation pad is damaged, and the trolley must be replaced, the workshop, central control and maintenance personnel shall be informed immediately. 2. Determine the number of the broken trolley at the head and tail of the machine. 3. When the crown block is in place, the spare trolley and necessary tools shall be prepared and placed at the rear of the machine. 4. When the trolley needs to be changed to pass through the round roller distributor, stop the round roller so that the trolley needs to be changed and the front and rear half of the trolley does not distribute. 5. By speeding up the speed or recing the comprehensive feeding amount in advance, the material level of the mixing bin is controlled at the low limit. 6. When the car needs to be changed out of the ignition furnace, close and open the flap valve of the bellows in turn to rece air leakage. 7. When the truck needs to be changed and it is close to the 21 ° bellows, the mixing system shall be stopped in advance. As far as possible, the mixing silo shall be discharged to prevent material sticking. 8. Stop at the left and right of 22 ° bellows and close several bellows flap valves nearby. 9. At the same time, the gas volume should be reced, as long as the fire can burn. 10. The crane hoists the broken trolley away (at this time, the castor bar is needed to block the wheels of the front and rear trolley) and replaces it with the standby trolley. 11. Turn up gas, start mixing, roll and trolley
2. Replace the castor bar
1. When it is found at the head and tail of the initiating explosive device or judged by the central control through the computer screen, confirm on site. 2. Prepare new castor strips and put them on the machine head. 3. Because it takes 100 minutes for the trolley to turn around, confirm the number of the trolley first, wait for it to turn to the head, stop the trolley, turn down the gas, and rece the total feeding amount a few minutes in advance. 4. Pull out the pressing block and plug of castor bar, and install the castor bar again. 5. Start up, turn on the gas, and the feeding quantity returns to normal
3. Red run material treatment
Red run material refers to the situation that the material is not fully burned on the sintering trolley and continues to burn when it falls onto the annular cooler (out of the annular cooling flue gas hood). At this time, 1. The speed of the circular cooler should be reced appropriately to make the sinter get more cooling time, but the ratio of the speed of the circular cooler to the speed of the trolley should not be less than 1.25. The speed of annular cooler should not be lower than 200R / min. 2. Turn on the tap at the curved rail to draw water for the material layer of the ring cooling car, and pay attention to the amount of water, because too much water will have a negative impact on the sinter pulverization performance. 3. Adjust the speed of plate feeder properly to prevent red ore from burning Z3 belt. 4. When there is still red material, you can also draw water on Z3. 5. At this time, the return ore will increase, so it is necessary to prevent the return ore fluctuation from affecting the second round fluctuation. 6. Analyze and summarize the cause of the accident in time
4. Wet material handling of the primary mixer
1. Turn off the water adding switch of the secondary mixer immediately. 2. Find out the reason and adjust the moisture rate setting value in time to ensure the moisture stability. 3. The tail of 2h-1 machine is marked to prevent the belt from pressing material e to excessive moisture. 4. According to the wet material time to rece the amount of comprehensive feeding, the longer the time, the greater the range. 5. Speed up the sintering trolley appropriately, control the lower limit of the material level of the mixing bin as far as possible, and prevent the wet material from entering the bin. 6. Bottom layer sintering. 7. The unloading level should also be kept low to prevent material sticking. 8. Wet material can't be put into the bedding material to prevent adhesion
5. Belt deviation adjustment
when belt deviation occurs, after the belt contacts the deviation detector, the deviation of the contact roller of the deviation detector reaches 30% °， The micro switch in the detector acts to stop the belt conveyor in linkage operation. 1. Generally, the head pulley is not adjusted when the belt deviates. When the belt deviates at the tail, the tail pulley is adjusted according to the forward direction of the belt. 2. When the belt deviates from the outer side of the upper idler, the upper idler frame moves according to the belt forward direction (the standing side is the inner side). 3. When the belt deviates from the outer side of the upper idler, the upper idler shall be adjusted in the opposite direction of the forward direction. 4. When the belt is too thin or stretched and deviates, adjust the tensioning device. 5. Due to improper cementation, re cementation is needed
6. Operation in case of coal breaking
1. Find out the reasons in time, such as the weighing belt slipping, no feeding, blanking funnel blocked, and deal with and adjust in time. 2. When the material is ready to leave the ring cooler, the comprehensive feeding amount is greatly reced. 3. When the plate feeder is discharged, the sintering rate is greatly reced
8.
Trough feeder
provided by star equipment
9. Mine first, then take the mine and go directly to the mints of various countries to make it. The mint is next to the governor.
10. 1. Gravity separation method gravity separation method is used to separate minerals according to the difference of relative density (usually called specific gravity). The mineral particles with different densities in the moving medium (water, air and heavy liquid) are affected by hydrodynamic and various mechanical forces, resulting in suitable loose stratification and separation conditions, so that the mineral particles with different densities can be separated. 2. Flotation flotation is based on the difference of physical and chemical properties of mineral surface, through flotation reagent treatment, the useful minerals can selectively adhere to the bubble to achieve the purpose of separation. Non ferrous metal ores such as copper, lead, zinc, sulfur and molybdenum are mainly treated by flotation; Some ferrous metals, rare metals and some non-metallic ores, such as graphite ore and apatite, are also separated by flotation. 3. Magnetic separation magnetic separation is based on the different magnetic properties of minerals. Different minerals are subject to different forces in the magnetic field of the magnetic separator, so as to be separated. It is mainly used to separate ferrous metal ores (iron, manganese and chromium); It is also used for the separation of nonferrous and rare metal ores. 4. Electric separation. Electric separation is based on the difference of mineral conctivity. When the mineral passes through the high voltage electric field of the electric separator, the electrostatic force acting on the mineral is different e to the different electrical conctivity of the mineral, so the mineral can be separated. Electric separation is used for the separation of rare metals, non-ferrous metals and non-metallic ores. At present, it is mainly used for separation and cleaning of mixed coarse concentrate; Such as the separation of scheelite and cassiterite; The separation of zircon and tantalum niobium ore, etc. Beneficiation equipment includes: ball mill, magnetic separator, dry magnetic separator, wet magnetic separator, magnetite beneficiation equipment, flotation machine, mine flotation machine, classifier, spiral classifier, high weir spiral classifier, dryer, rotary kiln, shaker, elevator, high frequency screen, finished proct screen, high efficiency thickener, spiral chute, disc granulator, trough feeder, Energy saving ball mill.
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