How is green silicon carbide produced?

Silicon carbide powder production process2009-2-9 **: China Mining and Metallurgical Equipment Network A production process of silicon carbide powder, which is characterized by the following steps: (1) take silicon carbide raw materials, crush them in the crusher, and screen them to silicon carbide particles not larger than 5mm, and then use a shaping machine to shape them to silicon carbide particles not larger than 2mm, and the oval particles account for more than 80, and then pickle and remove impurities, drying; (2) the above-mentioned dried silicon carbide particles are crushed into the silicon carbide powder of D50 with a pulverizer, and when crushing, the current of the main engine of the pulverizer is set to 65-75A, the flow rate of the fan is set to 40-50m3 min, and the speed of the analyzer is 400--600 rpm; (3) then use vortex type air flow classifier to classify silicon carbide powder, during classification, the fan flow rate of vortex type air flow classifier is 25-43m3 min, and the speed of classifying wheel is 2600--3300 rpm, the finished product A of particle size DS94 is separated from the grading port, and the semi-finished product of DS94 is separated from the cyclone port; (4) the semi-finished product separated by the vortex type air flow classifier cyclone outlet is then re-classified with the impeller type air flow classifier, and when classifying, the fan flow rate of the impeller type air flow classifier is 25-10m3 min, and the speed of the classifier wheel is 1300-1700 rpm, and the finished product B with particle size of DS94 is separated from the classification port, and the by-product is separated from the cyclone port.

Sieving Sieving is to divide particles and powders into particle segments of different sizes. A single TS vibrating screen can be equipped with 4 layers of screens, which can continuously sort 2-5 particle sizes and control a narrow particle size range. Sieving out impurities The high-performance sieve can quickly remove large or small particles with a low percentage of slurry residue separation in the process of high-flow treatment.

TS vibrating sieve can quickly remove the insoluble solid matter in all kinds of slurry, and continuously discharge the slag.

The manufacturing method of green silicon carbide is the same as that of black silicon carbide, but the purity of the raw materials used is higher, and it is also formed at a high temperature of about 2200 °C in the resistance furnace, green, translucent, hexagonal crystal shape, its SiC content is higher than that of black, and the physical properties are similar to black silicon carbide, but the performance is slightly brittle compared with black, and it also has good thermal conductivity and semiconductor characteristics.

About green silicon carbide, there may still be some people who do not know, I believe you will also be curious about how it is produced, the following is an introduction to its production process.

1. Green silicon carbide can be divided into flat grinding wheels, beveled grinding wheels, cylindrical grinding wheels, cup-shaped grinding wheels, saucer grinding wheels, etc. according to the shape; According to the binder, it can be divided into ceramic grinding wheel, resin grinding wheel, rubber grinding wheel, metal grinding wheel, etc. The characteristic parameters of the grinding wheel mainly include abrasive, viscosity, hardness, binder, shape, size, etc. Since the grinding wheel usually works at high speeds, a rotary test (to ensure that the grinding wheel will not break at the highest working speed) and a static balance test (to prevent vibration caused by the machine tool during operation) should be carried out before use.

After a grinding wheel has been in operation for a period of time, it should be dressed to restore grinding performance and correct geometry.

2. The manufacturing method of green silicon carbide is the same as that of black silicon carbide, but the purity of the raw materials used is higher, and it is also formed at a high temperature of about 2200 degrees Celsius in the resistance furnace, green, translucent, hexagonal crystal shape, its SiC content is higher than that of black, and its physical properties are similar to those of black silicon carbide, but the performance is slightly brittle compared with black, and it also has good thermal conductivity and semiconductor characteristics.

Difference Between Black Silicon Carbide and Green Silicon Carbide:

1. They are all made of quartz sand.

Petroleum coke and wood chips are used as raw materials and smelted at high temperature in a resistance furnace.

2. It's just that green silicon carbide should be smelted with salt as an additive. The crystalline body produced by smelting has high purity and high hardness, and its hardness is between diamond.

Between corundum and corundum, the black carbide auspicious cherry silicon and green carbon mechanical brightness banquet modulus is higher than corundum.

3. Black silicon carbide does not need additives, and the smelting time of black silicon carbide is lower than that of green silicon carbide. Then black silicon carbide is mainly used to deal with materials that resist tensile strength, such as glass, ceramics, stone, refractories, cast iron, non-ferrous metals, etc.;

4. Green silicon carbide has good self-sharpening, which is mainly used for processing cemented carbide, titanium alloy and optical glass, and is also used for honing cylinder liners and precision grinding high-speed steel.

Plagiarism tools and much more.

Black silicon carbide contains SiC, and its toughness is higher than that of green silicon carbide, and is mostly used in the production of Lingzi products with low tensile strength, such as glass, ceramics, stone, refractories, cast iron and non-ferrous metals. Green silicon carbide contains more than SiC99 and has good self-sharpening, and is mostly used in the production of cemented carbide, titanium alloy and optical glass products.

Black silicon carbide contains SiC, which is tougher than green silicon carbide, and is mostly used to process materials with low tensile strength, such as glass glass, ceramics, stone, refractories, cast iron and non-ferrous metals.

Green silicon carbide contains more than 99% SiC and has good self-sharpening, mostly used for processing cemented carbide, titanium alloy and optical glass, and also carries silver for honing cylinder liners and finely ground high-speed steel tools.

This problem has a lot to do with the temperature during firing.

The manufacturing method of green silicon carbide is the same as that of black silicon carbide, but the purity of the raw materials used is higher, and it is also formed at a high temperature of about 2200 °C in the resistance furnace, green, translucent, hexagonal crystal shape, its SiC content is higher than that of black, and the physical properties are similar to black silicon carbide, but the performance is slightly brittle compared with black, and it also has good thermal conductivity and semiconductor characteristics.

Industrial green silicon carbide varies with its purity due to the different types and contents of impurities it contains. The crystal structure is divided into -sic of hexagonal or rhombohedral and -sic of cube.

More than 70 varieties of SiC have been found due to the different stacking sequences of carbon and silicon atoms in their crystal structures. -SiC is converted to -SiC, green silicon carbide above 2100.

The industrial manufacturing method is to use high-quality quartz sand and petroleum coke to refine in a resistance furnace. The green silicon carbide blocks obtained are crushed, acid-alkali washing, magnetic separation and screening or water separation to make products of various particle sizes.

Specific uses of green silicon carbide:

1. As an abrasive, it can be used to make abrasives, such as grinding wheels, oil stones, grinding heads, sand tiles, etc.

2. As a metallurgical deoxidizer and high-temperature resistant material.

3. High-purity single crystal, which can be used to manufacture semiconductors and silicon carbide fibers.

4. It is mainly used in crystal grinding, monocrystalline silicon wire cutting, ceramic polishing, as well as the manufacture of precision grinding wheels, filling and modification of plastic products, and many other fields.

5. It can be used for crystal cutting and precision grinding, precision grinding of hard glass, slicing of monocrystalline silicon and polycrystalline silicon rods, precision grinding of monocrystalline silicon wafers, processing of superhard metals, processing of soft metals such as copper and copper alloys, processing of various resin materials, etc.

6. It is an ideal material for super-fine grinding oil stone. It has very good thermal conductivity and high temperature resistance.

Green silicon carbide is made of petroleum coke and high-quality silica as the main raw materials, adding salt as additives, and smelting at high temperature in a resistance furnace. It is green crystalline, brittle and sharp, and has certain thermal and electrical conductivity.

Green silicon carbide powder is made of high-quality large crystalline silicon carbide blocks by crushing, vertical ball mill particle shaping, pickling water, hydraulic precision classification, and high temperature drying after natural sedimentation, with stable quality, good crystallization, high surface cleanliness, no large particles, less fine particle content, concentrated particle size distribution, high grinding efficiency, suitable for various precision grinding processing, uniform surface of the processed workpiece, no scratches.

Green silicon carbide spherical sand and fine powder are secondary shaping products by Raymond mill, with fewer edges and corners of particles, good hydrophilicity, high grinding efficiency and long working life.

Uses of Green Silicon Carbide:

1. Section sand. Green silicon carbide sand is produced by Barmac sand making machine, with round particles, as a grinding medium, perfect replacement for ** zirconia balls, and has a perfect grinding effect in the grinding of ultra-fine powder of green silicon carbide photovoltaic cutting material, and does not affect the product content.

2. Granularized sand. Green silicon carbide granular sand is mainly used as a sandblasting medium for abrasive manufacturing and surface treatment; Abrasive manufacturing: resin grinding wheels, ultra-thin cutting discs, marble grinding wheels, diamond grinding discs, etc.; Surface Treatment:

Grinding cemented carbide, hard and brittle metallic and non-metallic materials - quartz glass, optical glass, piezoelectric ceramics, etc.

3. Micronized powder. Green silicon carbide powder can be used for precision grinding of hard glass, slicing of monocrystalline silicon and polycrystalline silicon rods, precision grinding of monocrystalline silicon wafers, processing of superhard metals, processing of soft metals such as copper and copper alloys, and processing of various resin materials.

Application of green silicon carbide: green silicon carbide, grinding wheel code GC grinding wheel is suitable for processing cemented carbide, glass, ceramics and non-metallic materials, but also used in semiconductor materials, high-temperature silicon carbon rod heating element, far infrared source substrate, etc.

Green silicon carbide production process: green silicon carbide.

The manufacturing method is the same as black silicon carbide, but the purity of the raw materials used is higher, and it is also formed at a high temperature of about 2200 °C in the resistance furnace, green, translucent, hexagonal crystal shape, its SiC content is higher than that of black, and the physical properties are similar to black silicon carbide, but the performance is slightly brittle compared with black, and it also has good thermal conductivity and semiconductor characteristics.

Due to its stable chemical properties, high thermal conductivity, small coefficient of thermal expansion and good wear resistance, green silicon carbide has many other uses in addition to being used as an abrasive.

Green silicon carbide grinding wheel is a porous body made by adding a binder to the abrasive, pressing, drying and roasting. According to the shape, it can be divided into flat grinding wheel, beveled grinding wheel, cylindrical grinding wheel, cup grinding wheel, disc grinding wheel, etc.; According to the binder, it can be divided into ceramic grinding wheel, resin grinding wheel, rubber grinding wheel, metal grinding wheel, etc.

Green silicon carbide is a special silicon carbide ceramic material that has many wide applications. Here are a few common application areas:

1.Electronics industry: Green silicon carbide is widely used in the electronics industry to manufacture semiconductor devices, such as power modules, rectifiers, diodes, etc. It has high temperature stability, electromagnetic interference resistance and excellent thermal conductivity, which is suitable for applications in high-power and high-temperature environments.

2.Guangchun Zhentong Electronics Industry: Green silicon carbide has important applications in optoelectronic devices, such as laser diodes, light-emitting diodes and photodetectors. Its high thermal conductivity and radiation resistance make it one of the important materials for optoelectronic devices.

3.Stove and chemical industry: Green silicon carbide has excellent high temperature resistance and corrosion resistance, so it is widely used in high-temperature stoves, corrosion-resistant equipment and chemical plants. It can withstand extreme temperatures and chemical environments, ensuring long-term stable operation of the equipment.

4.Ceramic industry: Green silicon carbide can be used to make ceramic parts, such as ceramic tools, ceramic bearings and ceramic nozzles. It has high hardness, high strength, and wear resistance to provide excellent performance and longevity.

In addition to the above applications, green silicon carbide has a wide range of uses in aerospace, automotive manufacturing, energy and medical devices. Due to its special physical and chemical properties, green silicon carbide has become the first choice for many high-performance and special environment engineering materials.

1. It is mainly used for wear-resistant, fire-resistant and corrosion-resistant materials, and can also be made into rocket nozzles, gas turbine blades, etc.

2. Functional ceramics: It can use its thermal conductivity, thermal radiation, high thermal strength and high thermal strength characteristics to manufacture thin plate kiln furniture.

3. It can be used for the production and processing of abrasives: mainly used to make grinding wheels, sandpaper, abrasive belts, oil stones, grinding blocks, grinding heads, grinding pastes, etc.

4. Metallurgical beneficiation: green silicon carbide is second only to diamond in hardness, has strong wear resistance, and is an ideal material for wear-resistant pipelines and bucket lining.

5. Its wear resistance is 5-20 times that of cast iron and rubber excitation glue, and it is also one of the ideal materials for aviation runways.

6. It is used for 3-12 inches of monocrystalline silicon, polycrystalline silicon, potassium arsenide, quartz lead eggplant crystal line cutting. It is an engineering processing material for the solar photovoltaic industry, semiconductor industry, and piezoelectric crystal industry.