Wet mica processing machine
1. Raymond grinding
mineral processing - Roughing - processing - grinding - grading - Packaging - finished procts
the mica powder content of the proct can reach more than 70%, which is suitable for medium and low-grade paint, exterior wall paint, anti-corrosion and arson paint, ship paint, rubber, welding electrode, cable and other instries, with good effect
2. A new process, air flow purification and classification processing, is adopted.
mica is an inorganic mineral. Our factory uses advanced crushing, grading technology and surface modification technology to proce and process mica with complete proct specifications. The main proct specifications are: 20 mesh, 40 mesh, 60 mesh, 80 mesh, 100 mesh, 200 mesh, 325 mesh, 400 mesh, 500 mesh, 600 mesh, 800 mesh, 1000 mesh, 1250 mesh, 2500 mesh
mica has the outstanding functions of insulation, high temperature resistance and chemical corrosion resistance. It can be widely used in oilfield drilling compound plugging materials, fire-fighting agents, fireproof coatings, paints, asbestos substitute materials, rubber and plastic procts, asphalt waterproof materials, cosmetics, welding electrodes, mica ceramics, insulation procts, electrical components, heat insulation procts and many other fields
What are mica and mica powder
the mica mainly crystallizes in monoclinic system, and the crystals are in the shape of pseudo hexagonal flakes, scales, plates, and sometimes pseudo hexagonal columns. Hardness 2 ~ 3, specific gravity 2.70 ~ 3.20. The refractive index of mica increases with the increase of iron content, from low to middle positive protuberance. The higher the iron content is, the darker the color is. At the same time, the polychromatic and absorptive properties are enhanced
the strata in Lingshou county are Archean double quality strata, which are rich in mica minerals. After exploration by the texture department, the reserves of broken mica reach 1.7 million tons, and the ore grade is high and the quality is good. It is the only broken mica procing area in China. Mica powder has unique acid and alkali resistance, chemical stability, heat resistance, non flammability and good insulation. It is widely used in international and domestic markets. It can be used in building materials instry instead of asbestos procts
Application of mica: Muscovite is the most widely used in instry, followed by phlogopite. It is widely used in building materials instry, fire instry, fire extinguishing agent, welding rod, plastic, electrical insulation, paper, asphalt paper, rubber, pearlescent pigment and other chemical instries. Ultrafine mica powder is used as functional filler for plastic, paint, paint, rubber and so on, which can improve its mechanical strength, enhance toughness, adhesion, anti-aging and corrosion resistance. In addition to high electrical insulation, acid-base corrosion resistance, elasticity, toughness and sliding performance, heat and sound insulation, low coefficient of thermal expansion and other properties, it is the first to introce the characteristics of smooth surface, large diameter thickness ratio, regular shape, strong adhesion and so on
in instry, it is mainly used as insulation material for electrical equipment and electrical apparatus e to its insulation and heat resistance, as well as acid resistance, alkali resistance, compression resistance and stripping resistance; Secondly, it is used to manufacture the window of steam boiler and smelting furnace and mechanical parts
broken mica and mica powder can be processed into mica paper, and can also replace mica sheet to proce various low-cost and uniform thickness insulating materials
the function of mica powder
1. Oil well drilling mud additive acts as sealant
2. In roofing materials, it plays the role of rain proof, heat insulation and decoration
3. Mica powder is used for mineral wool resin and coating, and can be used as decorative coating for concrete, stone and brick
4. Mica powder is used as protective coating for welding electrodes, wires and cables
5. Mica powder is used as filler for oil consumption, pipeline mortar and cementing agent, making decorative coatings and sound-absorbing putty; Ceiling and concrete filler and cement mortar filler, improve the strength of cement mortar
6. It is used as lubricant and filler for high strength electrical insulation, heat-resistant, acid and alkali resistant procts in rubber procts, as covering agent in tire retreading, and as lubricant between inner and outer tires in tire proction. In the use of rubber plastic, it can improve its mechanical strength, enhance toughness, adhesion, anti-aging and corrosion resistance.
market price of mica powder
580-4500rmb / T
the use and application of mica powder
Muscovite powder is characterized by insulation, high temperature resistance, luster, stable chemical properties, good insulation, elasticity and toughness. The processed mica powder also has better sliding performance, stronger covering and adhesion
(a) daily chemical raw materials: mainly used for cosmetics, carmine and pearl pigments, etc. Can increase luster
(b) mica ceramic raw material: it can be used as additive of mica ceramic, with good scalability, insulation and high temperature resistance
(c) paint additive: mica is used as additive in pearlescent paint, which can enhance the transparency and luster of the paint and rece the cost
(D) plastic and rubber filler: adding mica powder in plastic and rubber can enhance the aging resistance of plastics and rubber, increase strength and rece proction cost.
(E) building materials: mica powder is widely used in building materials, such as roofing materials, playing the role of waterproof, fireproof, thermal insulation and decoration. It can be used in linoleum, pipeline, mortar and cementing agent to improve the performance and so on
1. Mineral processing → coarse crushing → processing → grinding → classification → packaging → finished proct. The sericite content of the proct can reach more than 70%. It is suitable for middle and low grade paint, exterior wall paint, anti-corrosion and fireproof paint, ship paint, rubber, welding electrode, cable and other instries, with good effect
2. Mineral processing → coarse crushing → semi-finished procts processing → purification → grinding → classification → packaging → finished procts. In this process, sericite and quartz are separated, sericite powder is highly purified, and sericite content can reach more than 95%
is it possible to solve your problem?
The raw mica ore mined from the mine is selected by hand for the first time, and then processed for many times to form finished mica pieces of various specifications. During the whole processing, a large number of mica scraps are proced. Taking Muscovite as an example, only about 30% of instrial raw material mica (≥ 4cm < sup > 2 < / sup >) can be selected after the first processing of mica raw ore mined from the mine, and the rest will become mica slag and other wastes. After the second processing, only about 15% thick mica can be selected. Further stripping into thin sheets, processing into various parts, there are a lot of losses. From mining to processing, the utilization rate of mica is less than 3% ～ 10%. More than 90% of the rest are mica slag
in China, the mica resie after peeling and the mica leftover materials after processing mica parts are partly discarded except for paper making and mica powder making. Long term accumulation, waste of resources, but also cause environmental pollution
in mica instry, the so-called comprehensive utilization means that in addition to using large pieces of mica, it also makes full use of all the fine mica mined out, including the fine mica in synthetic mica, so as to improve the economic benefits of enterprises. There are many ways of comprehensive utilization of mica, which can be summarized as follows: 1; ② Proction of mica powder; ③ Proction of mica ceramics; ④ Proction of mica melting procts; ⑤ Proction of mica pearlescent pigment; ⑥ Proction of mica reinforced plastics
Due to the expansion of comprehensive utilization and the increase of varieties of mica procts, the proct structure of mica enterprises has graally shifted from the proct structure of procing large pieces of mica in the past to the proct structure of processing broken mica in the present. For example, the mass proction of mica paper has largely replaced mica sheet procts in large motors. Another feature of proct structure transformation is that the proction of electrical materials turns to non electrical application materials For a long time, mica has been an indispensable insulating material in electrical instry. For example, 1000 kg mica tape should be used for a 100000 kW, 10 kV two pole turbogenerator, of which about 450 kg mica tape is used. At present, there are many new materials, but no insulating material can replace mica. With the development of electrical instry, the demand for mica is increasing. However, it is difficult to mine mica, and the rate of mica proction is very low e to manual operation. The effective way to solve this contradiction is the manufacture and utilization of mica paper Mica paper was first developed in France and put into proction in 1947. Mica paper manufacturing technology keeps pace with large-scale integrated circuits, high-temperature plastics and optical fibers, and is known as one of the four major technologies that have made important contributions to the contemporary electrical and electronic instries abroad. It can be seen that the manufacture of mica paper plays an important role in modern technology Since the 1960s, China has also successfully developed mica paper relying on its own technical strength, and has successively developed new materials such as large scale mica paper and synthetic mica paper since the 1970s. At present, mica paper is almost used as the main insulator in large motors The biggest difference between the whole proction process and equipment of mica paper and other kinds of paper is the pulping process. The proction process of mica paper is as follows:manufacture of mica paper pulp → mica paper making → finished proct finishing → adhesive → reinforcing material → mica paper procts
(2) manufacture of mica paper pulp
crush the broken mica with the thickness of mm into fine mica scales with the thickness of less than micron, and then separate the mica scales suitable for manufacturing mica paper, The process of mixing with a certain amount of water is the manufacturing process of mica pulp
mica paper is formed by the attraction (van der Waals force, etc.) between multi-layer mica scales. Therefore, the larger the area and the thinner the thickness of mica flakes, the better the performance of mica paper. In order to ensure the quality of mica paper, the scale of mica paper pulp should meet the following requirements: the thickness of the sheet is micron; The thickness ratio of scales is more than 50-100; The scale area was uniform; There are few surface defects; The surface is clean and clean without contamination
The manufacturing methods ofmica pulp are calcined chemical pulping and hydraulic pulping
Calcined chemical pulping method: the structural water in mica structure is removed from the selected mica fragments by high temperature calcination, which makes the mica fragments expand along the direction perpendicular to the cleavage surface and soften the texture. Then the mica fragments are fully cleaved and split by chemical treatment, and then washed and stirred. This method is called calcined chemical manufacturing method, commonly known as ripening method. The process flow is as follows:
processing and development of non-metallic minerals
chemical treatment method is divided into:
(1) acid-base method
calcined mica is immersed in 2% - 10% Na < sub > 2 < / sub > CO < sub > 3 < / sub > solution for 5-30 minutes without cooling, Then, HCl or H < sub > 2 < / sub > so < sub > 4 < / sub > with the concentration of 2% ~ 3% is added to neutralize it, and a large amount of CO < sub > 2 < / sub > gas is proced, which makes the initially expanded mica further expand and rupture, and then the mica slurry is formed by mechanical stirring and water cleaning
(2) the calcined mica clinker was immersed in ammonium carbonate solution by ammonium carbonate method, and then the clinker soaked in ammonium carbonate solution was heated to 100-400 ℃ in a reactor (NH < sub > 4 < / sub >) < sub > 2 < / sub > CO < sub > 3 < / sub > and decomposed into CO < sub > 2 < / sub > and NH < sub > 3 < / sub >, the mica layer was further broken and stirred to form slurry
The mica clinker was immersed in 2% ～ 5% dilute acid, and then heated to form slurry. The treatment conditions were as follows: solid: solution: 1 ∶ 8 ～ 1 ∶ 12, treatment temperature: 90 ～ 100 ℃, treatment time: 30 ～ 60 minutes In a special chamber, mica flakes are stripped and broken into fine scales by high pressure jet water, and then the mica flakes suitable for papermaking are separated by mineral processing. The process is as follows:mica chips → separation → water washing → hydraulic pulping → hydrocyclone classification → dehydration and concentration
(3) the whole proction process and equipment of mica paper are different from other types of paper in pulp making process. As a whole, the manufacturing process and equipment of mica paper are the same as those of other kinds of paper and paperboard
composition of paper machine: net section, press section, drying section, finishing section, coiling section, transmission section, etc. The mica slurry of 2% ～ 3% concentration in the slurry tank is diluted to the concentration of 0.3% ～ 0.7% with water. Put it into the downstream overflow net slot. As soon as the round mesh cage is transferred into the slurry of the mesh slot, it starts to filter the slurry, that is, the moisture of the slurry leaks through the screen, and the mica piece is filtered on the mesh cage. When the slurry flow rate is consistent with the linear speed of the mesh cage, it can be evenly sized to form a uniform mica paper tire
the mica paper tire is continuously formed with the continuous rotation of the circular mesh cage in the mesh slot, and the formed paper tire is wrapped by endless annular blanket under the action of the couch roller. Because the specific surface area of the blanket is much larger than that of the circular cage, the wet tire paper is transferred to the blanket, held by the blanket, and further dehydrated by the vacuum suction tank and the press section, Under the protection of the blanket, the moisture removed from the mesh is about 95% ～ 98%, which is transferred to the steam dryer for partial drying, and then sent to the paper coiling section for coiling, which is the process of making mica paper
(4) the mechanical strength of mica paper procts is very low, no matter it is calcined mica paper (cooked paper) or non calcined mica paper (raw paper), so it can not be used directly. Because the mica flakes are combined by the resial bond force, and the fresh surface of mica flakes is easy to absorb water, hydroxyl and other types of ions or molecular gases, which affects the close combination of mica. Therefore, mica paper needs to be made into various procts together with adhesives and reinforcing materials, such as mica motherboard, in order to meet the requirements of different uses1. Raw materials and requirements
1) mica paper tire: qualified mica paper tire
Adhesive: the adhesive with good electrical insulation, moisture resistance, water resistance, drug resistance, good thermal stability, excellent adhesive ability and high mechanical strength should be selected. Such as shellac, modified organic silica gel, modified organic titanium epoxy, polyester, phosphate, borate, etc (3) reinforcing materials: common alkali free glass cloth, mica tape paper (made of mulberry fiber, high impregnation capacity, good mechanical properties, thickness of 0.025-0.005mm, large tensile force, light weight), telephone paper (made of unbleached sulfuric acid pulp), polyester film, all aromatic polyester ammonium acylate fiber paper, etc The mica paper and reinforcing material are cut to the required size according to the thickness of the finished proct. After coating the adhesive, the mica paper and reinforcing material are dried and melted at 100-130 ℃, pressed at 10-20kg / cm < sup > 2 < / sup > for 5-30 minutes, cooled to room temperature and discharged. The process is as follows:mica paper + reinforcing material + adhesive → consolidated by hot pressing
Common mica paper procts are divided into mica tape, soft mica board, plastic mica board, heat-resistant mica board and mica foil according to the type, dosage and reinforcing material of adhesive (1) mica tapee.g. multi glue mica tape: it contains more than 35% glue and has a thickness of 0.14-0.16mm
mica tape with less glue powder: the glue content is about 5% and the thickness is 0.14mm
The thickness of three in one mica tape was 0.14-0.16mmfireproof mica tape: thickness 0.1-0.15mm
The thickness of soft mica plate was 0.42mm The thickness of mica paper was 0.04-0.08mm(2) molding powder cloud motherboard
molding powder cloud motherboard is hard board at room temperature, slightly brittle, soft when heated, plastic, and can be made into different shapes of parts, such as pipes, under the action of external force
proction method: lay the glass cloth on the worktable, brush the prepared adhesive evenly, lay the mica paper flat, and then brush the adhesive. Increase the number of mica paper according to the thickness of the proct. If it is reinforced on both sides, a layer of glass fiber cloth is added, and then the finished molding powder mica board blank is put on the wire mesh and dried at 140-150 ℃ for 2 h. The dried blanks are stacked into slabs according to the thickness, and the materials are laid out in the same order as the soft powder cloud mother plate, while the number of slabs is determined according to the thickness requirements, and then pressed after flattening. The pressing condition is preheating at 140-160 ℃ for 20-40 minutes, and then pressing at 15-20 kg / cm < sup > 2 < / sup > pressure for 15-20 minutes
(3) heat resistant mica master board the improved heat resistant mica master board mainly depends on the adhesive. The heat resistance of mica is above 600 ℃. There are inorganic adhesives, organic adhesives (special type) and organic-inorganic mixed adhesives. Such as: heat resistant organic silica gel, ammonium phosphate, aluminum phosphate, borate, silicate
(4) mica foil is made of mica paper, adhesive and reinforced glass fiber cloth or telephone paper by drying, melting and pressing. It has plasticity at a certain temperature, and can be used as winding insulation material for motor and electric Mica ceramics can be divided into natural mica ceramics and synthetic mica ceramics. Natural mica ceramics are also called glass bonded micaAccording to statistics, there are 10 categories and more than 100 varieties of mica procts in the world. There are nearly 30 kinds of mica procts in China, including mica sheet, mica powder, mica paper, mica capacitor, mica insulating procts and mica electric heating elements< At present, there are more than 100 mica mining and processing enterprises in China, but the scale is generally small. There are more than 10 mica mining enterprises in China, including Sichuan Danba mica mine and Xinjiang mica mine. The annual proction capacity of mica is 130000 tons; The main proction enterprises of mica paper in China include: Sichuan Ya'an mica Instry Co., Ltd., Sichuan Guangyuan Hongsheng mica procts Co., Ltd., Zhejiang Hangzhou mica paper factory, Inner Mongolia Zhuozi mica procts factory, Xinjiang Beitun mica paper factory, etc., with 41 mica paper proction lines, and the annual proction capacity of mica paper is about 11000 tons; There are more than 100 mica powder proction enterprises, most of which are dry mica powder enterprises. The annual proction capacity of dry mica powder is more than 40000 tons, and that of wet mica powder is about 10000 tons
the mica flake is composed of phengite, quartz, garnet and rutile. Albite, zoisite and hard chlorite can be found in the mica flake. Garnet is rich in Fe and Mg, and Si in phengite can reach 3.369, which is also a high pressure combination. It has the function of insulation and low loss thermal resistance. It is also a good blackbody
natural mica sheet is a kind of mica part with certain thickness and shape, which is made of thick mica by peeling, thickness setting, cutting, drilling or punching. The proct is suitable for TV, power capacitor, thermal relay, monitoring display, aerospace, aviation, communication, Leida, heat-resistant frame sheet and other raw and auxiliary materials. Divided into: electric heater chip, electric heater shield, gasket, electronic tube piece, light bulb piece, because its material is natural mineral procts, with pollution-free, insulation, good voltage resistance characteristics, according to customer demand punching various specifications of natural mica piece.