Rare earth ore dryer
rotary dryer is generally suitable for powdery and granular materials, and can also be used for drying sticky paste materials or materials with high water content by partially mixing materials. Its advantages are large proction capacity, wide application range, small flow resistance, large allowable fluctuation range and convenient operation
working principle
the dry wet materials are sent to the hopper by belt conveyor or bucket elevator, and then enter the feeding end through the feeding pipe through the hopper feeder. The inclination of the feeding pipe should be greater than the natural inclination of the material, so that the material can flow into the dryer smoothly. The cylinder of the sleeve dryer is a rotating cylinder slightly inclined to the horizontal line. When the material is added from the higher end, the heat carrier enters from the lower end and contacts with the material in a counter current, and the heat carrier and the material flow into the cylinder in parallel. With the rotation of the cylinder, the material moves to the lower end under the action of gravity
when the wet material moves forward in the cylinder, it is directly or indirectly heated by the heat carrier to dry the wet material, and then it is sent out by the belt conveyor or screw conveyor at the discharge end. The inner wall of the cylinder is equipped with a board, which is used to and scatter the material, so as to increase the contact surface between the material and the air flow, so as to improve the drying rate and promote the material forward. The heat carrier is generally divided into hot air, flue gas and so on. After the heat carrier passes through the drum dryer, the cyclone st collector is generally required to capture the materials in the gas. If it is necessary to further rece the st content of tail gas, it should be discharged after the bag filter or wet filter<
hot air dryer
purpose
typical applications of hot air mixer dryer include sludge drying, gypsum drying, ore mud drying, pengruntu drying, distiller's grains drying, fruit resie drying, medicine resie drying, soybean resie drying, sugar resie drying, sauce resie drying, peat drying, rare earth and other high humidity materials drying, organic, inorganic compounds and chemical raw materials and other muddy, powdery Drying of flake high humidity materials. After drying by hot air dryer (hot air dryer), the particle size of the material is 2-5mm, and the temperature of the material is not high ring the drying process, so it is suitable for heat sensitive materials<
working principle
the hot air dryer (hot air stirring dryer) adopts a double shaft stirring and screw driven high humidity and viscous material fast dryer, which is suitable for drying high viscosity and high humidity materials. The hot air dryer can dry high humidity materials with initial moisture content less than 65% to final moisture content less than 5-12% at one time, and the drying time is short, generally 2-20 minutes. Due to the high-speed stirring blades of the heat separation dryer agitate the wet materials intensely, the wet materials can be in good contact with the hot air. The moisture in the first half of the hot air dryer evaporates quickly, and the temperature of the hot air in the dryer drops sharply. Therefore, even if the hot air is used in the hot air mixing dryer, the temperature rise of the material is not high<
steam dryer
purpose
steam dryer is suitable for 50-1000t / D oil pressing plant and oil leaching plant. It is mainly used for softening (and drying) of raw materials, improving the plasticity of raw materials, making the embryo proced by the embryo binding machine thin and unbroken, meeting the requirements of subsequent processes, so as to achieve the effect of embryo pressing, steam frying, pressing and leaching. The appearance of yrhg horizontal softener fills in the domestic blank and overcomes the shortcomings of other softeners
performance characteristics
high energy saving and low consumption: compared with the vertical softening pot, the power consumption is 1 / 4 ~ 1 / 3 of the vertical softening pot, and the gas consumption is 1 / 2 ~ 2 / 3 of the vertical softening pot. Compared with the current horizontal softener, the solar term is 10% ~ 15%, the length is 20% ~ 30% shorter, and a lot of lubricating oil and maintenance costs are saved in one year
excellent softening effect: adopting horizontal roller structure, low energy consumption, small power, uniform turning of materials in the machine, overcoming dead angle and good softening effect
convenient process adjustment: stepless speed regulation mechanism is selected, which can be adjusted effectively and conveniently according to different moisture content of materials and process parameters. Unique transmission mode: the power transmission adopts unique soft transmission or gear transmission, which makes the equipment smooth and low noise
safety of ice condensate discharge: the unique condensate discharge setting enables the equipment to effectively discharge condensate ring use, greatly improving the heating effect of steam<
airflow dryer
purpose
airflow dryer uses the principle of airflow instant drying, which has the characteristics of high drying intensity, short drying time, low energy consumption, simple operation and good proct quality. The starch dried by this equipment has the advantages of clean appearance, luster, high fineness, stable water content and little impurity pollution. Air flow dryer is suitable for starch, rice flour, food, medicine, chemical instry and other instries drying powder, flake, heat sensitive materials ideal equipment. Using this equipment can get the best economic benefit with the least investment, the least energy consumption, the least manpower and space, the fastest speed
performance characteristics
e to the high air velocity and good dispersion of materials in the gas phase, the air flow dryer can take all the surface of materials as the effective drying area, so the limited drying area is greatly increased. At the same time, e to the dispersion and agitation ring drying, the gasification surface is constantly updated, so the heat transfer intensity of drying process is high.
There are mainly two kinds of sludge dryers: single channel rotary dryer and hot air rotary dryer. The most commonly used sludge drying equipment is single channel rotary dryer:
suitable for urban sludge drying. Single channel rotary dryer is a new type of equipment developed from ordinary rotary dryer. The internal installation of depolymerization mechanism, movable grate wing plate, cleaning device and crushing device can dry sticky materials which can not be processed by ordinary rotary dryer. Single channel dryer is the best choice for sludge with certain viscosity and small particle size. Using single channel rotary dryer, downstream process and specially designed feeding device, the sludge can quickly exchange heat with high-temperature hot flue gas at the moment when it enters the dryer, forming a hard shell on its surface, which greatly reces the phenomenon of sludge sticking to the cylinder and material blocking. In the first quarter section of the dryer, in addition to the lifting plate, the depolymerization mechanism for enhanced evaporation and the linked grate wing plate are installed at the same time, which can not only transmit heat, but also prevent the sludge from sticking to the cylinder and lifting plate. Taking full advantage of the fast drying rate at the feed end, the method of layer by layer "stripping" is realized to make it dry rapidly. Hot air rotary dryer is generally used for high viscosity sludge drying equipment: according to different sludge viscosity, double axis rotary dryer (vertical, horizontal) and three axis rotary dryer (horizontal) can be used to dry high humidity materials with initial moisture content less than 85% to final moisture content less than 12% at one time, with short drying time, generally 2-10 minutes. Because of the high-speed stirring blades
agitating wet materials intensively, the wet materials can be in good contact with hot air. The moisture of materials in the first half of the machine evaporates rapidly, and the temperature of hot air in the machine drops sharply. Therefore, even if high temperature hot air is used, the temperature of materials is not high. Typical applications include electroplating sludge drying, papermaking sludge drying, oilfield sludge drying, chemical sludge drying, mineral sludge drying, fruit resie drying, soybean resie drying, sugar resie drying, peat drying, rare earth and other high humidity materials drying, organic and inorganic compounds and chemical raw materials and other muddy, powdery and flaky high humidity materials drying
commonly used sludge drying equipment the most commonly used sludge drying equipment is single channel rotary dryer:
suitable for urban sludge drying. Single channel rotary dryer is a new type of equipment developed from ordinary rotary dryer. The internal installation of depolymerization mechanism, movable grate wing plate, cleaning device and crushing device can dry sticky materials which can not be processed by ordinary rotary dryer. Single channel dryer is the best choice for sludge with certain viscosity and small particle size. Using single channel rotary dryer, downstream process and specially designed feeding device, the sludge can quickly exchange heat with high-temperature hot flue gas at the moment when it enters the dryer, forming a hard shell on its surface, which greatly reces the phenomenon of sludge sticking to the cylinder and material blocking. In the first quarter section of the dryer, in addition to the lifting plate, the depolymerization mechanism for enhanced evaporation and the linked grate wing plate are installed at the same time, which can not only transmit heat, but also prevent the sludge from sticking to the cylinder and lifting plate. Taking full advantage of the fast drying rate at the feed end, the method of layer by layer "stripping" is realized to make it dry rapidly<
high viscosity sludge drying equipment: hot air rotary dryer is generally used in high viscosity sludge drying equipment:
according to different sludge viscosity, two axis rotary dryer (vertical, horizontal) and three axis rotary dryer (horizontal) can be used to dry high moisture materials with initial moisture content less than 85% to final moisture content less than 12% at one time, with short drying time, generally 2-10 minutes. Due to the high-speed stirring blade stirring wet materials, wet materials can be in good contact with hot air. The moisture of the material evaporates quickly in the first half of the machine, and the temperature of the hot air in the machine drops sharply. Therefore, even if high temperature hot air is used, the temperature rise of the material is not high. Typical applications include electroplating sludge drying, papermaking sludge drying, oilfield sludge drying, chemical sludge drying, mineral sludge drying, fruit resie drying, soybean resie drying, sugar resie drying, peat drying, rare earth and other high humidity materials drying, organic and inorganic compounds and chemical raw materials and other muddy, powdery and flaky high humidity materials drying.
The sludge dryer can dry the material with 90% water content to the finished proct at one time. According to the characteristics of sludge easy to agglomerate in the drying process, the material plate structure of the general single channel dryer is changed, and the combined self-cleaning device is adopted, which greatly expands the application scope of the single channel dryer. It can not only dry all kinds of sludge, but also dry all kinds of high viscosity materials
the sludge enters the guide plate in the dryer through the chute of the feeder. With the rotation of the cylinder, the sludge is led to the inclined lifting plate, that is, it is lifted to the center of the cylinder, and graally falls to form the material curtain, through which the high-temperature air flows to preheat the sludge and evaporate part of the water. When the sludge spills and moves to the movable grate wing plate, the material is mixed with the preheated grate wing plate to transfer heat to the material and make part of the water evaporate. At the same time, the material carried by the wing plate is lifted, spilled and repeated for many times, and the material and hot air flow carry out convection and contact heat exchange. At the same time, the cleaning device buried in the material also slides down along the inner side of the arc-shaped lifting plate to clean the material adhered to the inner wall of the lifting plate. When the cleaning device turns the vertical line with the cylinder, it drags on the back of the arc lifting plate to clean the material adhered to the outer wall of the lifting plate. With the continuous rotation of the cylinder, part of the water evaporates and the sludge is further dried. At the same time, the cleaning device also plays a role in breaking the sludge ball, improving the drying speed. Finally, after the sludge is dried, it becomes loose material with low moisture and is discharged from the discharge port
the most commonly used sludge drying equipment is single channel rotary dryer:
it is suitable for urban sludge drying. Single channel rotary dryer is a new type of equipment developed from ordinary rotary dryer. The internal installation of depolymerization mechanism, movable grate wing plate, cleaning device and crushing device can dry sticky materials which can not be processed by ordinary rotary dryer. Single channel dryer is the best choice for sludge with certain viscosity and small particle size. Using single channel rotary dryer, downstream process and specially designed feeding device, the sludge can quickly exchange heat with high-temperature hot flue gas at the moment when it enters the dryer, forming a hard shell on its surface, which greatly reces the phenomenon of sludge sticking to the cylinder and material blocking. In the first quarter section of the dryer, in addition to the lifting plate, the depolymerization mechanism for enhanced evaporation and the linked grate wing plate are installed at the same time, which can not only transmit heat, but also prevent the sludge from sticking to the cylinder and lifting plate. Taking full advantage of the fast drying rate at the feed end, the method of layer by layer "stripping" is realized to make it dry rapidly. Hot air rotary dryer is generally used in high viscosity sludge drying equipment:
according to different sludge viscosity, two axis rotary dryer (vertical, horizontal) and three axis rotary dryer (horizontal) can be used to dry high humidity materials with initial moisture content less than 85% to final moisture content less than 12% at one time, with short drying time, generally 2-10 minutes. Due to the high-speed stirring blade stirring wet materials, wet materials can be in good contact with hot air. The moisture of the material evaporates quickly in the first half of the machine, and the temperature of the hot air in the machine drops sharply. Therefore, even if high temperature hot air is used, the temperature rise of the material is not high. Typical applications include electroplating sludge drying, papermaking sludge drying, oilfield sludge drying, chemical sludge drying, mineral sludge drying, fruit resie drying, soybean resie drying, sugar resie drying, peat drying, rare earth and other high humidity materials drying, organic and inorganic compounds and chemical raw materials and other muddy, powdery and flaky high humidity materials drying
3. Electric bell: when the circuit is closed, the electromagnet attracts the elastic piece to make the hammer move towards the iron bell, and the hammer strikes the iron bell and makes a sound. At the same time, the circuit is disconnected, the electromagnet has no magnetism, and the hammer is bounced back, and the circuit is closed. So repeatedly, the bell rings continuously< 4. Maglev train: maglev train is a kind of Maglev high-speed train system which adopts contactless electromagnetic suspension, guidance and drive system. Its speed can reach more than 500 kilometers per hour. It is the fastest ground passenger transport in the world. It has the advantages of high speed, strong climbing ability, low energy consumption, low noise, safety and comfort, no fuel, less pollution and so on. And it uses elevated way, occupies little arable land
maglev train means that these trains use the basic principle of magnetism to suspend on the guide rail instead of the old steel wheel and rail train. Magnetic levitation technology uses electromagnetic force to lift up the whole train carriage, get rid of the annoying friction and unpleasant clang, and realize fast "flight" without contact with the ground and fuel< Loudspeaker: loudspeaker is a device that converts electrical signal into acoustic signal. The utility model is mainly composed of a fixed permanent magnet, a coil and a conical paper basin
when sound passes through the coil in the loudspeaker in the form of audio current, the magnetic field generated by the magnet on the loudspeaker will exert a force on the coil, and the coil will vibrate at different frequencies e to the change of current strength, thus driving the paper basin to emit different frequencies and intensities of sound. The paper basin propagates the vibration through the air, which proces the sound we hear
6. Household appliances, such as refrigerators and vacuum cleaners, have electromagnets. Electromagnets are also used in motors, generators and electromagnetic relays. The water inlet and drainage valves of the automatic washing machine and the inctive flush valve in the toilet are also controlled by electromagnets
extended data:
electromagnet principle: when the iron core is inserted into the solenoid, the iron core is magnetized by the magnetic field of the solenoid. The magnetized iron core also becomes a magnet, so the magnetic field of the solenoid is greatly enhanced e to the superposition of the two magnetic fields. In order to make the electromagnet more magnetic, the iron core is usually made into a shoe shape
however, it should be noted that the winding direction on the shoe iron core is opposite, one side must be clockwise, the other side must be counterclockwise. If the winding direction is the same, the magnetization of the two coils to the iron core will cancel each other, so that the iron core will not show magnetism. In addition, the iron core of electromagnet is made of soft iron, not steel. Otherwise, once the steel is magnetized, it will remain magnetic for a long time and can not be demagnetized, so the strength of its magnetism can not be controlled by the size of the current, and it will lose the advantages of electromagnet.
The mine dry magnetic separator is a mineral processing machine for dry magnetic minerals. The pyrite magnetic separator requires that the separated minerals be dry, and the particles can move freely and form an independent free state. Otherwise, the magnetic separation effect will be affected. The permanent magnet dry magnetic separator has the characteristics of advanced structure, light weight, reliable operation and convenient maintenance
mine magnetic separator is a new type of magnetic separation equipment specially designed and developed for the low content of ferromagnetic materials in pyrite. The main function of this equipment is to improve the grade of iron ore with low iron content after magnetic separation, thus greatly saving the cost for ball milling and cleaning
The sand iron ore magnetic separator developed by the company is made of Nd-Fe-B composite strong magnetic system. The dry magnetic separator has been improved and finalized by our company for many times in user practice, and has the characteristics of large processing capacity and high recovery rate. The grade of coarse iron powder recovered by the first magnetic separation is between 30-40. After grinding by cone energy-saving ball mill and separation by magnetic separator, the iron concentrate with grade above 63% can be obtainedour company can provide: ore sample analysis - process recommendation - equipment selection - commissioning and commissioning - after-sales service and other mining equipment whole line beneficiation scheme, welcome customers to visit our company! Please refer to personal data,
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Ball mill is the key equipment to crush the material after it is crushed
ball mill is one of the high fine grinding machines widely used in instrial proction
there are many kinds of ball mills, such as hand ball mill, horizontal ball mill, ceramic ball mill, ball mill bearing bush, energy-saving ball mill, overflow ball mill, lattice ball mill, enamel ball mill
ball mill is suitable for grinding all kinds of ores and other materials. It is widely used in mineral processing, building materials and chemical instry. It can be divided into dry grinding and wet grinding. According to the different ways of ore discharge, it can be divided into grid type and overflow type
the classifier (spiral classifier) is widely used in ore dressing plants to form a closed-circuit cycle with ball mill to separate ore sand, or in gravity dressing plants to grade ore sand and fine mud, and in metal dressing processes to grade ore pulp particle size, as well as in ore washing operations such as desliming and dewatering. The machine has the characteristics of simple structure, reliable operation and convenient operation. The classifier is based on the principle that the size and specific gravity of solid particles are different, so the settling speed in liquid is different. Fine ore particles float in water and overflow, while coarse ore particles sink at the bottom of the tank. It is a kind of classification equipment for mechanical classification by pushing the screw upward to discharge. It can filter the powder from the mill, and then screw the coarse material into the feed port of the mill by using the screw, and discharge the filtered fine material from the overflow pipe. The base of the machine is made of channel steel and the body is made of steel plate by welding. The head of screw shaft and shaft head are made of pig iron sleeve, which is wear-resistant and rable. The lifting device can be divided into electric and manual. Magnetic separator can separate many minerals, such as magnetite, limonite, hematite, manganese siderite, ilmenite, wolframite, manganese ore, manganese carbonate, metallurgical manganese ore, manganese oxide, iron ore, kaolin, rare earth ore, etc. Magnetic separation process is in the magnetic field of magnetic separator, with the help of magnetic and mechanical force on the role of ore particles to achieve separation. Different magnetic particles move along different trajectories and are separated into two or several separate mineral processing procts
the new electromagnetic high gradient magnetic separator effectively solves the problem of the rising price of permanent magnet rare earth, etc. the high gradient magnetic separation equipment integrates large cavity kaizhuang high-performance physical magnet technology,
new multi spinel non embroidered magnetic aggregate steel wool material technology, solid-liquid gas three-phase flow membrane separation technology, high-power low-voltage high current rectification technology, PLC electric control technology and flow, temperature, temperature, etc Pressure testing technology
the sorting magnetic field is high (up to 2.2t), the magnetic field gradient is high, and the magnetic field size can be freely adjusted according to the needs
it adopts programmable control, and the whole proction process is fully automatic, which is convenient to change the process
the electromagnetic high gradient magnetic separator is a sort tank with a certain number of magnetic stainless steel wool (or steel mesh) placed in the pin mounted solenoid coil. After the coil is excited, the magnetic stainless steel wool is magnetized, and a highly uneven magnetic field is generated on its surface, that is, a high gradient magnetic field. When paramagnetic materials pass through the steel wool in the sort tank, the magnetic field is very uneven, A magnetic force proportional to the proct of the applied magnetic field and the magnetic field gradient will be absorbed on the surface of the steel wool, and the non-magnetic materials will directly pass through the magnetic field, pass through the non-magnetic valve and pipe, and flow into the non-magnetic proct tank. When the weak magnetic material collected by the steel wool reaches a certain degree (determined by the process requirements), the feeding is stopped. The excitation power supply is disconnected and the magnetic material is washed. The magnetic material flows into the magnetic proct tank through the magnetic material valve and pipeline. Then the second operation, such a cycle, cycle
the motion track of the vibrating screen is circular, and the circular vibrating screen does circular motion. It is a new type of vibrating screen with multi layers and high efficiency. The circular vibrating screen adopts cylinder eccentric shaft vibration exciter and eccentric block to adjust the amplitude. The material screen has a long flowing line and many screening specifications. It is specially designed for quarries to screen materials. It can also be used for proct classification in mining, coal preparation, mineral processing, building materials, electric power and chemical instry departments. It has the advantages of reliable structure, strong exciting force, high screening efficiency, low vibration noise, strong rability, etc
the flotation machine is suitable for the separation of non-ferrous metals, as well as non-metallic materials such as coal fluorite and talc. The flotation machine is driven by the trigonometric generation of the motor to drive the impeller to rotate, resulting in centrifugal action to form negative pressure. On the one hand, the sufficient air is mixed with the slurry, and the slurry is mixed with the medicine on the one hand, and the foam is refined at the same time, so that the mineral adheres to the foam and floats to the slurry surface to form a mineralized foam. Adjust the height of the gate and control the liquid level, so that the useful foam is scraped out by scrapers. All of these belong to the more important equipment in the mineral processing equipment. The equipment listed below is all the auxiliary equipment of some mineral processing equipment, so the introction will not be introced again. Vibrating feeder is also called vibrating feeder. In the proction process, the vibrating feeder can evenly, regularly and continuously feed the massive and granular materials from the storage bin to the receiving device. In the sand proction line, it can continuously and evenly feed the crushing machinery and coarse screen the materials. It is widely used in the crushing and screening combined equipment in metallurgy, coal mine, mineral processing, building materials, chemical instry, abrasive and other instries
the vibrating feeder is used to supply materials from the storage bin or other storage equipment to the receiving equipment evenly or quantitatively. It is a necessary equipment for the implementation of flow process automation. Vibration feeder can be divided into open type and closed type. According to the requirements of the proction of motor vibration feeder, hopper, conveyor
vibration feeder is generally used in mining instry. It is a new type of quantitative feeding equipment, which can adapt to the requirements of continuous proction, so it has been widely used in mining, metallurgy, coal and other instries. The agitator drum is used to agitate the pulp before flotation operation, so that the pulp can be fully mixed with the reagent, creating conditions for the optional ore operation.
working principle and application scope of the agitator drum:
this machine is a necessary equipment driven by the motor V-belt instead of the impeller, which can fully mix the medicine and pulp, increase the reaction time of the reagent, and strengthen the quality of the drug reaction, This machine is suitable for mineral processing, also can be used for various kinds of chemical instry. The mixing barrel is suitable for all kinds of metal ores, mainly used for mixing before flotation. It can fully mix the reagent and pulp, and can also be used for mixing other non-metallic minerals. It is used in the case that the concentration of fixed components is less than 30% (by weight) and the particle size is less than 1 mm. Instructions for use of mixing drum: before use, tighten the bolts on the pump body, rotate the pump shaft to check whether it is flexible, and then start the machine to run. The others are the same as the flotation machine. Vulnerable parts: impeller, stator. Dryer mainly includes: rotary dryer, rotary dryer, instrial dryer
tunnel dryer
dryer is mainly used for drying materials with certain humidity or particle size in mineral processing, building materials, metallurgy, chemical instry, printing and other departments. Rotary dryer has strong adaptability to materials, can dry all kinds of materials, and the equipment operation is simple and reliable, so it is widely used< It is widely used in building materials, metallurgy, chemical instry and cement instry to dry slag, limestone, pulverized coal, slag, clay and other materials. The machine is mainly composed of revolving body, lifting plate, transmission device, supporting device and sealing ring. The utility model has the advantages of reasonable structure, excellent proction, high output, low energy consumption, convenient operation, etc. Thickener: suitable for concentrate and tailings dewatering treatment in concentrator, widely used in metallurgy, chemical instry, coal, non-metallic mineral processing, environmental protection and other instries. In fact, the high-efficiency thickener is not a simple settling equipment, but a new type of dewatering equipment combined with the filtration characteristics of the mud layer
the thickener is characterized by: (1) adding flocculant to increase the particle size of settling solid particles, so as to speed up the settling speed 2) The inclined plate is installed to shorten the settlement distance and increase the settlement area 3) Play the role of flocculation, filtration, compression and increase the treatment capacity of the thick layer of mud deposition 4) Equipped with complete automatic control facilities
thickener - & gt; High efficiency thickener - & gt; Proct details:
Thickener (high-efficiency thickener) is generally composed of concentration tank, cake rack, transmission device, cake rack lifting device, feeding device, discharging device and signal safety device
the main feature of Thickener (high-efficiency thickener) is to add a certain amount of flocculant to the slurry to be concentrated, so as to make the ore particles in the slurry form flocs and speed up its sedimentation speed, so as to improve the concentration efficiency
Thickener (high-efficiency thickener) is widely used in the treatment of slime, wastewater and waste resie in metallurgy, mining, coal, chemical instry, building materials, environmental protection and other departments, which is of great significance to improve the utilization rate of backwater and underflow transport concentration and protect the environment
thickener classification: central drive thickener, peripheral drive thickener, high efficiency thickener, sludge thickener, intermittent thickener, vertical flow thickener and radial flow thickener. Rotary kiln refers to rotary calcining kiln (commonly known as rotary kiln), which belongs to building materials and equipment. Rotary kiln can be divided into cement kiln, metallurgical chemical kiln and lime kiln according to different materials. In building materials, metallurgy, chemical instry, environmental protection and many other proction instries, rotary kiln is widely used for mechanical, physical or chemical treatment of solid materials. This kind of equipment is called rotary kiln
the application of rotary kiln originated from cement proction. In 1824, J ASPP, a British cement worker, invented the earth shaft kiln with intermittent operation; In 1883, German Dietrich invented the multi-layer vertical kiln with continuous operation; In 1885, eransome, an Englishman, invented the rotary kiln and put it into proction after obtaining patents in the United Kingdom and the United States. The invention of rotary kiln not only makes the cement instry develop rapidly, but also promotes people's research on the application of rotary kiln. Soon, rotary kiln is widely used in many instrial fields, and becomes more and more important in these proction, becoming the core equipment of corresponding enterprises. Its technical performance and operation, to a large extent, determine the quality, output and cost of enterprise procts“ As long as the kiln turns, there will be tens of millions. "This ballad is a vivid description of the importance of rotary kiln in proction. In the application field of rotary kiln, cement instry has the largest number. The whole proction process of cement is summarized as "two grinding and one burning", in which "one burning" is the process of burning raw meal prepared by grinding into clinker under the high temperature of rotary kiln. Therefore, rotary kiln is the main machine in cement proction, commonly known as the "heart" of cement plant. In the building materials instry, in addition to calcining cement clinker, rotary kiln is also used for calcining clay, limestone and slag drying; In the proction of refractories, the raw materials are calcined in rotary kiln to make the size stable, the strength increased and then processed. In nonferrous and ferrous metallurgy, iron, aluminum, copper, zinc, tin, nickel, tungsten, chromium, files and other metals are sintered and roasted in rotary kiln. For example: in aluminum proction, it is used to calcine aluminum hydroxide into alumina; In ironmaking, it is used to proce pellets for blast furnace ironmaking; The foreign "SL / RN" and "Krupp" methods use them for direct rection of iron ore; It is used to extract tin and lead by chlorination volatilization roasting method. In the process of mineral processing, the lean iron ore is magnetized and roasted in a rotary kiln
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the gold ore processing technology mainly includes three processes: crushing, grinding and mineral processing. In the process of crushing, the three-stage closed-circuit crushing is the most modern one, which is suitable for crushing high hardness gold ore and can complete the crushing and partial dissociation of ore, so as to improve the subsequent grinding efficiency; In the grinding process, the two-stage and one closed grinding is an efficient grinding process, which can make the gold ore grinding more fully; In recent years, there are some successful new mineral processing technologies, such as gravity separation, mixed mercury separation, cyanidation, flotation, etc
the first stage: crushing and screening
the large gold ore is evenly sent to jaw crusher or mobile jaw crusher station (primary crushing) for coarse crushing by vibrating feeder; After coarse crushing, the gold ore is screened by vibrating screen and sent to single cylinder hydraulic cone crusher (secondary crushing) by belt conveyor for medium crushing; The medium crushed gold ore material is sent to the multi cylinder hydraulic cone crusher for fine crushing
the second stage: grinding
the 0-12mm gold powder screened by the vibrating screen is evenly sent to the ball mill for grinding, and screened by the spiral classifier, and the unqualified gold powder is sent to the ball mill for grinding
the third stage: magnetic separation
the gold powder meeting the requirements of mineral processing is sent to the flotation machine for strong flotation to remove impurities
the fourth stage: drying
the obtained gold powder is sent to the dryer for drying, and then the refined gold powder can be obtained
reference: http://www.shibangchina.com/anli/wuliao/ksps/jinkuangshi.html
2. The latest research on the technology of extracting gold from gold ore
cyanidation has been widely used and has always occupied a dominant position. However, e to its high price, high toxicity and environmental pollution, especially in the case of refractory refractory gold ore, Its economic index and technical effect are doubted and challenged. Therefore, how to improve the cyanidation process and make it more widely used in refractory gold ore has become an urgent task. In order to solve this problem, oxidation pretreatment method is proposed for refractory gold ore
in the proction line of gold mine, the basic characteristics of refractory gold ore in the proction process of gold mine are that the particle size of gold and its carrier minerals is fine, and gold is wrapped in pyrite, arsenopyrite, antimony sulfide or disseminated in the crystal of sulfide minerals in the form of fine particles or micro morphology; Arsenic and organic carbon are harmful impurities, which are closely related to gold. Since the mid-1970s, this kind of gold ore has been discovered in Guangxi, Yunnan, Guizhou, Sichuan, Anhui, Gansu and Northeast China. The proved reserves are about 700T and the prospective reserves are more than 1000t< br />
3、 Methods
1) chlorination leaching of gold ore in aqueous solution http://www.shibangchina.com/kuangshi/jinkuangshi/6695.html
2) cyanide leaching ion exchange resin adsorption method
reference: http://www.shibangchina.com/kuangshi/jinkuangshi/6655.html
3) gold thermal rection method for preparation of rare earth gold ore
reference: http://www.shibangch ina.com/kuangshi/jinkuangshi/3640.html