What kind of powder concentrator is used for mineral powder mill
Publish: 2021-05-07 11:32:49
1.
"GEC environmental protection coin" is suspected of pyramid selling, which is deceptive
"GEC environmental protection coin" trading mode has been widely spread, which takes "ecological environment protection", "zero investment", "zero risk" and "high income" as labels, and draws people into the partnership to pull down the development capital chain. Instry experts pointed out that the environmental protection coin can basically be classified as a circle. The appearance of disk circle is virtual currency, and the core is capital disk. The former's income comes from the later's capital. This model is not only suspected of ICO in disguise, but also suspected of MLM
extended information:
"GEC environmental protection coin" is obviously in line with the nature of pyramid scheme
one is to solicit customers with extremely high returns and declare that they only go up but not down, which has great attraction to investors
the second is to build the head MLM framework, build the membership mode, and realize the viral sales of GEC
Third, its sales and operation dare not be exposed to the "sunshine", but only through private means such as wechat group, which has the attributes of high concealment and avoiding supervision. Above all, the income model of "GEC environmental protection coin" has seriously deviated from the nature of bitcoin like assets, and even violated relevant laws and regulations. It is suggested that investors should guard against similar virtual currency investment model. He Nanye further stressed that this kind of mode can be identified as ICO, the core is illegal ICO, and the means is MLM mode2.
bus line: 154 → K22, the whole journey is about 12.7km
1. Walk about 210m from Kunming station to Kunming Station (Yongsheng Road)
2. Take No. 154, pass 8 stops, and reach Shuangfeng intersection (Guangfu Road)
3. Take No. K22, pass 9 stops, and reach No. 13 Hall Station of Dianchi Convention and Exhibition Center
4. Walk about 520m, Arrive at Kunming Dianchi International Exhibition Center
3. HTC is going to close down, not focusing on customer experience is doomed to be the end
4. First of all, I want to understand what you are grinding
2 and how long will it take for you to grind 300000 tons of mineral powder? You have to refine it
3 your grinding requirement is to what extent
only when I understand the above three points can I give a complete answer and find the right medicine to the case
generally speaking, the high-pressure roller mill and ball mill are used now, which are the most mainstream grinding equipment
I specialize in mining machinery and equipment, including high-pressure roller mill, ball mill, magnetic separator, jaw crusher, vibrating screen, beneficiation shaker, belt conveyor, flotation machine, dryer, classifier, electromagnetic vibration feeder, spiral chute and other grinding and beneficiation equipment and supporting machines. As well as waste heat power generation project and fan procts, welcome to inquire and negotiate.
2 and how long will it take for you to grind 300000 tons of mineral powder? You have to refine it
3 your grinding requirement is to what extent
only when I understand the above three points can I give a complete answer and find the right medicine to the case
generally speaking, the high-pressure roller mill and ball mill are used now, which are the most mainstream grinding equipment
I specialize in mining machinery and equipment, including high-pressure roller mill, ball mill, magnetic separator, jaw crusher, vibrating screen, beneficiation shaker, belt conveyor, flotation machine, dryer, classifier, electromagnetic vibration feeder, spiral chute and other grinding and beneficiation equipment and supporting machines. As well as waste heat power generation project and fan procts, welcome to inquire and negotiate.
5.
Two e10.3 is enough for normal use
e10.3 theoretical power consumption is 2400W (measured: e10.1 power consumption is about 2200W, e10.3 power consumption is 3300W
at present, e10.1 model is more popular in the market. The old E10 is also good. Wing bit e10.3 as far as the current market is concerned, the heat is not high, mainly in terms of power consumption. It often appears that two 1800W power supplies can not afford one e10.3, and the computing power is not enough. E10.1 is more suitable for mining because the power consumption amplitude is not very large
6. Fluorite mill configuration is very diverse and flexible, the specific configuration depends on your proction requirements. 120 mesh fluorite powder (hcq1290) proction line fine powder mill high-yield flexible configuration, by the host, feeder, classifier, blower and other combination configuration, specific you can see
7.
With regard to the question of what kind of proction line equipment should be used for the 325 mesh cooked bauxite mill, the first thing to understand is the equipment required for the 325 mesh cooked bauxite mill. Then, what are the principles for the selection of these different equipment? Combined with these aspects, when the 325 mesh cooked bauxite mill is configured, The main proction line equipment that can be selected are as follows:
first of all, the proction of cooked bauxite mill must be inseparable from the mill, which requires 325 mesh. Therefore, the mill equipment that can be selected include vertical mill, suspension roller mill, etc. these different mills can meet the processing requirements of 325 cooked bauxite. In addition to the mill, when the cooked bauxite is processed, Also need some auxiliary equipment, such as belt conveyor, feeder, etc., these different equipment together group mature bauxite processing proction line
Secondly, in addition to the selection of equipment type, we should also pay attention to the proction requirements, such as the requirements for proction capacity. Generally speaking, different proction capacity requirements lead to different proction line equipment to be selected. At the same time, we also need to pay attention to the cost input of the 325 mesh proction line equipment, As well as the manufacturer's after-sales problemsthis paper mainly introces the problem of which proction line equipment is good for the 325 mesh of cooked bauxite grinding. The analysis of this problem is mainly carried out from two aspects: one is the problems of the 325 mesh of cooked bauxite grinding proction line equipment, the other is the principles to be followed in the selection of these proction line equipment, Combined with these aspects, we can choose the appropriate proction line equipment for cooked bauxite grinding. For other questions about the proction line equipment for 325 mesh of cooked bauxite grinding, please consult: www.shibangchina.com Hope to help you
8. I don't know, but the ball mill is certain, and then there are some metering and conveying equipment,
there are powder concentrators, which can also be used, but a large number of concrete should be trial mixed
there are powder concentrators, which can also be used, but a large number of concrete should be trial mixed
9. This requires a pulverizing equipment, which can be broken into 1-5mm particles by sand making machine, 1-200 mesh finished procts by ball mill, and 1000 mesh procts by ultra-fine grinding. Specific processing requirements need you to provide, and then according to the needs to select equipment.
10. 1. The characteristics of st-containing waste gas in slag grinding system
in order to give full play to the potential of slag, it is necessary to grind the slag. According to the standard of granulated blast furnace slag powder used in cement and concrete (GB / T18046-2000), if the specific surface area of slag is controlled at 420-450m2 / kg, it can meet the requirements of grade S95 in the standard. This not only meets the requirements of 42.5-52.5 grade slag cement (slag content 30% - 50%) provided by cement manufacturers, but also meets the requirements of ready mixed concrete company to configure more than C60 concrete. According to the existing equipment, vertical mill, roller press, ball mill and vibration mill can be used for final grinding, or the combined grinding process of vertical mill + ball mill and roller press + ball mill can be used. In recent years, the final grinding process using vertical mill to proce slag powder is the most common and developing rapidly
2. The waste gas of slag grinding system generally has the following characteristics:
(1) fine st particles. Only when ground to a certain fineness (specific surface area) can the ground slag fully participate in the hydration reaction and improve its activity, but it is also related to the composition of the particles. The more fine particles, the larger specific surface area. Under the specific surface area specified in the standard, the slag is less than 10 μ The particle size of p.0525 is 58%, which is more than that of fly ash and p.0525 cement. It can be seen that the particle size of slag powder is small and it has strong suspension in waste gas, which brings great difficulty to st removal
(2) high st concentration. No matter it is ball mill or vertical mill, the st concentration of waste gas containing st in slag grinding system is relatively high, generally 400-1000g / m3, e to the cancellation of cyclone st collector for secondary st removal
(3) high moisture content of st. Because the water content of water quenched slag is high, sometimes as high as 15% - 20%, the water is difficult to remove before grinding, and a lot of heat will be generated in the grinding process. The vertical mill is also equipped with hot blast stove to supply heat to the mill, and the water content of the final fine powder is controlled at 0.5% - 1.2%< With the continuous development of bag filter technology, especially the research and application of new filter materials and the development of ash cleaning technology, bag filter has been more widely used in the st removal of slag grinding system. According to the characteristics of slag grinding process system and st-containing waste gas, two kinds of bag filter, reverse blowing type and pulse injection type, have been developed and applied at home and abroad. Among them, pulse injection type has air box pulse bag filter, low pressure long bag pulse bag filter and box pipe combined with low resistance and high efficiency bag filter
the back blowing bag filter is an internal filter bag filter which uses high-pressure back blowing machine for st cleaning, and has the following characteristics:
(1) the energy of st cleaning is low, the filtering wind speed must be low, and the design filtering wind speed is normally selected as 0.4 ~ 0.5m/min, so it has the advantages of large equipment volume, high steel consumption, high energy consumption It has the disadvantages of large area and high investment
(2) for the normal treatment of low concentration st gas, the allowable inlet st concentration is less than 150g / m3. For the high concentration waste gas, the secondary st collection must be used, so the process is more complex
(3) high st removal efficiency, such as low filtering wind speed, can also achieve emission concentration & lt; 50 mg / Nm3, but it is difficult to achieve the emission concentration & lt; 30mg/Nm3
(4) it is difficult to remove the st thoroughly by using reverse air blowing, the design resistance of the equipment is less than 1770pa, and a large amount of fresh cold air is introced ring ash removal, which is not concive to anti condensation
(5) e to large equipment volume, complex process and large floor area, it is not suitable for slag grinding proction line with large scale and large air volume. According to the analysis of the above characteristics, the application of this technology will be less and less until it is eliminated
with the improvement of the performance of new filter materials and the development of pulse st removal technology, pulse jet bag filter has been applied in slag grinding system to a certain extent. Compared with the reverse blowing bag filter, the pulse blowing bag filter has better performance, and its performance characteristics are as follows:
(1) the external filtering type is adopted, and the designed filtering wind speed is 0.8 ~ 1.0m/min, so it has the advantages of smaller equipment volume, lower steel consumption, small floor area and less investment
(2) it can deal with the high concentration st gas below 1000g / m3, whether it is matched with vertical mill or ball mill, it only needs one-stage st collection, and the process flow is simple
(3) the electromagnetic pulse valve is used for pulse ash cleaning, with high energy and thorough ash cleaning
(4) the polyester needle felt membrane filter material has good anti-wear, anti bending and anti condensation properties
however, when the low-pressure long bag pulse st collector is used in the slag grinding system, because the slag powder st particles are fine, the moisture content is high, the viscosity is strong, and the ash cleaning is difficult, it will cause high resistance of the whole machine and affect the proction and operation cost of the system. The st collector belongs to pulse jet, which has the characteristics of st secondary flying, fast resistance rising, more st cleaning times, and shortens the service life of pulse valve and filter bag
in order to effectively avoid the disadvantages of high resistance, short filter bag life and high power consumption of the bag filter, relevant domestic research and design institutes have successively developed FGM type air box pulse bag filter for slag and kdmc large-scale low resistance bag filter. Among them, FGM type air box pulse bag filter for slag is improved on the basis of original air box pulse bag filter, which is suitable for treating air volume below 200000 m3; Kdmc large-scale low resistance bag filter is based on the original air box pulse bag filter to optimize the design of large air volume, low resistance and air equalizing structure. It adopts "box pipe pulse" st cleaning device, which is suitable for treating air volume above 200000 m3. The two kinds of bag filter have optimized the selection of filter materials, At present, these two kinds of bag filters have become the first choice of domestic st removal equipment in slag grinding system< 4. Introction of new st removal technology of slag grinding system
4.1 FGM air box pulse bag filter for slag
FGM air box pulse bag filter is mainly composed of box, bag chamber, ash hopper, air inlet and outlet, filter bag, bag cage, pillar, ladder, railing, air circuit system, lifting valve system, ash discharging device, ash cleaning controller, etc. The air inlets and outlets are connected as a whole to form an air ct. The air inlets and outlets are respectively arranged on the two opposite sides of the bag room, and the middle part is separated into two mutually impermeable parts by an inclined clapboard, so that the air flow is evenly distributed and the pre st collection effect is good
its working principle is: the st containing flue gas first enters from the air inlet. Under the guidance of the inclined baffle of the air ct, the cross section of the air ct expands and the wind speed decreases. Some larger st particles fall into the ash hopper e to inertial collision, natural settlement and other reasons, and most of the st particles enter the bag chamber with the air flow. After filtering by the filter bag, the st particles are blocked outside the filter bag, The purified flue gas enters the air purification box from the inside of the filter bag, and then is discharged into the atmosphere through the valve plate hole and the air outlet to achieve the purpose of st collection; With the continuous filtration process, the accumulation of st outside the filter bag is graally increasing, so that the running resistance of the st collector is graally increasing. When the resistance increases to the preset value (1245-1470pa) or the set time, the ash cleaning controller sends out a signal. First, it controls the lift valve to close the valve plate hole to cut off the filtering flue gas flow of the unit and stop the filtering process. Then, the electromagnetic pulse valve is opened to inject compressed air with a pressure of 0.5-0.7mpa into the clean gas box in a very short time (0.1-0.15s), The compressed air expands rapidly in the clean air box and pours into the inside of the filter bag, causing deformation and vibration of the filter bag. With the effect of counter air flow, the st outside the bag room is removed and falls into the ash hopper. After the ash cleaning, the lifting valve is opened again and the st collector enters the filtering state again. The st cleaning action is automatically controlled by PLC, and the st cleaning controller has two types: timing type and constant pressure type
its performance characteristics are as follows:
(1) it can deal with high concentration of st gas, as long as the primary st collection, the process flow is simple
(2) it has the advantages of small equipment volume, low steel consumption, small floor area and less investment
(3) the kinetic energy of ash cleaning is large and the ash cleaning is complete
(4) the running resistance of the equipment is low, less than 1500pa
(5) the filter bag has long service life and good anti condensation performance
5. Selection of bag filter for slag grinding
according to the process design scheme and original parameters, the main steps include: Determination of treatment air volume, determination of bag filter type, selection of filter air speed, calculation of filter area, selection of filter specification, etc
5.1 determination of treated air volume
e to different processes adopted in slag grinding system, different moisture content of raw materials and different quality requirements of procts, the treated air volume per unit output is different. In the practice of instrial operation, most of the vertical mill finishing grinding process is used. All the finished materials are transported by wind. The treatment air volume is usually calculated by "the minimum air volume required to take away the ore powder". The minimum air volume required to take away the ore powder can be calculated according to the inlet st concentration of 220-270g / m3. The treated air volume can also be calculated by the output per unit hour of the mill. The treated air volume q = (4200 ~ 4800) g, where G is the output per unit hour of the mill (unit: T / h). The results of the two calculation methods are basically consistent. The treatment air volume of bag filter should be selected according to theoretical calculation combined with empirical data, according to the maximum amount of waste gas generated in general proction, and 5% of system air leakage should be considered
5.2 determination of bag filter type
according to the above structure and principle analysis, FGM pulse bag filter for slag and kdmc large low resistance bag filter have their respective application scope. FGM type pulse bag filter with air box for slag can be selected for treatment air volume less than 200000 m3; Kdmc large low resistance bag filter can be selected for the treatment air volume above 200000 m3
ordinary polyester needle felt and polyester needle felt membrane covered filter material can be used for FGM type slag pulse bag filter with small air volume. If 550G / m2 polyester needle punched felt membrane filter material is selected, the filtering wind speed is less than 1.0m/min; If 550G / m2 polyester needle felt filter material is selected, the filtering wind speed should be 0.8 ~ 0.9m/min. For kdmc large-scale low resistance bag filter with large air volume, the characteristics of slag powder, operation resistance and service life of filter bag should be comprehensively considered. 550G / m2 polyester needle punched felt membrane filter material should be selected, and the filtering wind speed should be less than 1.0m/min
6. Conclusion
the selection of bag type st collector for slag grinding should mainly consider the determination of treatment air volume, the determination of bag type st collector, the selection of filtering air speed, the calculation of filtering area, the selection of st collector specification, etc. At present, FGM bag filter for slag and kdmc large-scale low resistance bag filter have been widely used. With the increasing scale of slag powder proction line, kdmc large-scale low resistance bag filter has good economic, social and environmental benefits, which has become the preferred proct of owners and design institutes.
in order to give full play to the potential of slag, it is necessary to grind the slag. According to the standard of granulated blast furnace slag powder used in cement and concrete (GB / T18046-2000), if the specific surface area of slag is controlled at 420-450m2 / kg, it can meet the requirements of grade S95 in the standard. This not only meets the requirements of 42.5-52.5 grade slag cement (slag content 30% - 50%) provided by cement manufacturers, but also meets the requirements of ready mixed concrete company to configure more than C60 concrete. According to the existing equipment, vertical mill, roller press, ball mill and vibration mill can be used for final grinding, or the combined grinding process of vertical mill + ball mill and roller press + ball mill can be used. In recent years, the final grinding process using vertical mill to proce slag powder is the most common and developing rapidly
2. The waste gas of slag grinding system generally has the following characteristics:
(1) fine st particles. Only when ground to a certain fineness (specific surface area) can the ground slag fully participate in the hydration reaction and improve its activity, but it is also related to the composition of the particles. The more fine particles, the larger specific surface area. Under the specific surface area specified in the standard, the slag is less than 10 μ The particle size of p.0525 is 58%, which is more than that of fly ash and p.0525 cement. It can be seen that the particle size of slag powder is small and it has strong suspension in waste gas, which brings great difficulty to st removal
(2) high st concentration. No matter it is ball mill or vertical mill, the st concentration of waste gas containing st in slag grinding system is relatively high, generally 400-1000g / m3, e to the cancellation of cyclone st collector for secondary st removal
(3) high moisture content of st. Because the water content of water quenched slag is high, sometimes as high as 15% - 20%, the water is difficult to remove before grinding, and a lot of heat will be generated in the grinding process. The vertical mill is also equipped with hot blast stove to supply heat to the mill, and the water content of the final fine powder is controlled at 0.5% - 1.2%< With the continuous development of bag filter technology, especially the research and application of new filter materials and the development of ash cleaning technology, bag filter has been more widely used in the st removal of slag grinding system. According to the characteristics of slag grinding process system and st-containing waste gas, two kinds of bag filter, reverse blowing type and pulse injection type, have been developed and applied at home and abroad. Among them, pulse injection type has air box pulse bag filter, low pressure long bag pulse bag filter and box pipe combined with low resistance and high efficiency bag filter
the back blowing bag filter is an internal filter bag filter which uses high-pressure back blowing machine for st cleaning, and has the following characteristics:
(1) the energy of st cleaning is low, the filtering wind speed must be low, and the design filtering wind speed is normally selected as 0.4 ~ 0.5m/min, so it has the advantages of large equipment volume, high steel consumption, high energy consumption It has the disadvantages of large area and high investment
(2) for the normal treatment of low concentration st gas, the allowable inlet st concentration is less than 150g / m3. For the high concentration waste gas, the secondary st collection must be used, so the process is more complex
(3) high st removal efficiency, such as low filtering wind speed, can also achieve emission concentration & lt; 50 mg / Nm3, but it is difficult to achieve the emission concentration & lt; 30mg/Nm3
(4) it is difficult to remove the st thoroughly by using reverse air blowing, the design resistance of the equipment is less than 1770pa, and a large amount of fresh cold air is introced ring ash removal, which is not concive to anti condensation
(5) e to large equipment volume, complex process and large floor area, it is not suitable for slag grinding proction line with large scale and large air volume. According to the analysis of the above characteristics, the application of this technology will be less and less until it is eliminated
with the improvement of the performance of new filter materials and the development of pulse st removal technology, pulse jet bag filter has been applied in slag grinding system to a certain extent. Compared with the reverse blowing bag filter, the pulse blowing bag filter has better performance, and its performance characteristics are as follows:
(1) the external filtering type is adopted, and the designed filtering wind speed is 0.8 ~ 1.0m/min, so it has the advantages of smaller equipment volume, lower steel consumption, small floor area and less investment
(2) it can deal with the high concentration st gas below 1000g / m3, whether it is matched with vertical mill or ball mill, it only needs one-stage st collection, and the process flow is simple
(3) the electromagnetic pulse valve is used for pulse ash cleaning, with high energy and thorough ash cleaning
(4) the polyester needle felt membrane filter material has good anti-wear, anti bending and anti condensation properties
however, when the low-pressure long bag pulse st collector is used in the slag grinding system, because the slag powder st particles are fine, the moisture content is high, the viscosity is strong, and the ash cleaning is difficult, it will cause high resistance of the whole machine and affect the proction and operation cost of the system. The st collector belongs to pulse jet, which has the characteristics of st secondary flying, fast resistance rising, more st cleaning times, and shortens the service life of pulse valve and filter bag
in order to effectively avoid the disadvantages of high resistance, short filter bag life and high power consumption of the bag filter, relevant domestic research and design institutes have successively developed FGM type air box pulse bag filter for slag and kdmc large-scale low resistance bag filter. Among them, FGM type air box pulse bag filter for slag is improved on the basis of original air box pulse bag filter, which is suitable for treating air volume below 200000 m3; Kdmc large-scale low resistance bag filter is based on the original air box pulse bag filter to optimize the design of large air volume, low resistance and air equalizing structure. It adopts "box pipe pulse" st cleaning device, which is suitable for treating air volume above 200000 m3. The two kinds of bag filter have optimized the selection of filter materials, At present, these two kinds of bag filters have become the first choice of domestic st removal equipment in slag grinding system< 4. Introction of new st removal technology of slag grinding system
4.1 FGM air box pulse bag filter for slag
FGM air box pulse bag filter is mainly composed of box, bag chamber, ash hopper, air inlet and outlet, filter bag, bag cage, pillar, ladder, railing, air circuit system, lifting valve system, ash discharging device, ash cleaning controller, etc. The air inlets and outlets are connected as a whole to form an air ct. The air inlets and outlets are respectively arranged on the two opposite sides of the bag room, and the middle part is separated into two mutually impermeable parts by an inclined clapboard, so that the air flow is evenly distributed and the pre st collection effect is good
its working principle is: the st containing flue gas first enters from the air inlet. Under the guidance of the inclined baffle of the air ct, the cross section of the air ct expands and the wind speed decreases. Some larger st particles fall into the ash hopper e to inertial collision, natural settlement and other reasons, and most of the st particles enter the bag chamber with the air flow. After filtering by the filter bag, the st particles are blocked outside the filter bag, The purified flue gas enters the air purification box from the inside of the filter bag, and then is discharged into the atmosphere through the valve plate hole and the air outlet to achieve the purpose of st collection; With the continuous filtration process, the accumulation of st outside the filter bag is graally increasing, so that the running resistance of the st collector is graally increasing. When the resistance increases to the preset value (1245-1470pa) or the set time, the ash cleaning controller sends out a signal. First, it controls the lift valve to close the valve plate hole to cut off the filtering flue gas flow of the unit and stop the filtering process. Then, the electromagnetic pulse valve is opened to inject compressed air with a pressure of 0.5-0.7mpa into the clean gas box in a very short time (0.1-0.15s), The compressed air expands rapidly in the clean air box and pours into the inside of the filter bag, causing deformation and vibration of the filter bag. With the effect of counter air flow, the st outside the bag room is removed and falls into the ash hopper. After the ash cleaning, the lifting valve is opened again and the st collector enters the filtering state again. The st cleaning action is automatically controlled by PLC, and the st cleaning controller has two types: timing type and constant pressure type
its performance characteristics are as follows:
(1) it can deal with high concentration of st gas, as long as the primary st collection, the process flow is simple
(2) it has the advantages of small equipment volume, low steel consumption, small floor area and less investment
(3) the kinetic energy of ash cleaning is large and the ash cleaning is complete
(4) the running resistance of the equipment is low, less than 1500pa
(5) the filter bag has long service life and good anti condensation performance
5. Selection of bag filter for slag grinding
according to the process design scheme and original parameters, the main steps include: Determination of treatment air volume, determination of bag filter type, selection of filter air speed, calculation of filter area, selection of filter specification, etc
5.1 determination of treated air volume
e to different processes adopted in slag grinding system, different moisture content of raw materials and different quality requirements of procts, the treated air volume per unit output is different. In the practice of instrial operation, most of the vertical mill finishing grinding process is used. All the finished materials are transported by wind. The treatment air volume is usually calculated by "the minimum air volume required to take away the ore powder". The minimum air volume required to take away the ore powder can be calculated according to the inlet st concentration of 220-270g / m3. The treated air volume can also be calculated by the output per unit hour of the mill. The treated air volume q = (4200 ~ 4800) g, where G is the output per unit hour of the mill (unit: T / h). The results of the two calculation methods are basically consistent. The treatment air volume of bag filter should be selected according to theoretical calculation combined with empirical data, according to the maximum amount of waste gas generated in general proction, and 5% of system air leakage should be considered
5.2 determination of bag filter type
according to the above structure and principle analysis, FGM pulse bag filter for slag and kdmc large low resistance bag filter have their respective application scope. FGM type pulse bag filter with air box for slag can be selected for treatment air volume less than 200000 m3; Kdmc large low resistance bag filter can be selected for the treatment air volume above 200000 m3
ordinary polyester needle felt and polyester needle felt membrane covered filter material can be used for FGM type slag pulse bag filter with small air volume. If 550G / m2 polyester needle punched felt membrane filter material is selected, the filtering wind speed is less than 1.0m/min; If 550G / m2 polyester needle felt filter material is selected, the filtering wind speed should be 0.8 ~ 0.9m/min. For kdmc large-scale low resistance bag filter with large air volume, the characteristics of slag powder, operation resistance and service life of filter bag should be comprehensively considered. 550G / m2 polyester needle punched felt membrane filter material should be selected, and the filtering wind speed should be less than 1.0m/min
6. Conclusion
the selection of bag type st collector for slag grinding should mainly consider the determination of treatment air volume, the determination of bag type st collector, the selection of filtering air speed, the calculation of filtering area, the selection of st collector specification, etc. At present, FGM bag filter for slag and kdmc large-scale low resistance bag filter have been widely used. With the increasing scale of slag powder proction line, kdmc large-scale low resistance bag filter has good economic, social and environmental benefits, which has become the preferred proct of owners and design institutes.
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