Where is the main origin of emery in China?

Compared with the diamond reserves of some countries in the world, China's diamond reserves rank about 9 10th in the world. However, the degree of exploration and availability of diamond producing areas in China is relatively high. Where:

Where the mineral reserves that have been explored account for the total reserves, where the mineral reserves have been investigated in detail and the total reserves, the mineral reserves that have been surveyed only account for the total reserves; The reserves of utilized and near-term available mineral lands account for 84% of the total reserves, and the reserves of temporarily unusable mineral lands account for 16% of the total reserves. China's proven diamond reserves were more concentrated in 1964 and 1980, and after 1985, although the proved reserves basically did not increase, significant progress was made in the vigorous implementation of the diamond prospecting plan.

Production origin: Zhengzhou, Henan.

China is one of the countries in the world with poor diamond mineral resources, although diamonds have been found in 16 provinces (regions) so far, there are only proven reserves in four provinces: Liaoning, Shandong, Hunan and Jiangsu. By the end of 1996, there were 24 proven diamond mineral fields in China, and the cumulative proven diamond mineral reserves were B+C+D grade 4

equivalent to 20,000 ct), of which B+C grade reserves 2 are equivalent to 10,000 ct), in addition to the closed pit of Xiaobuling diamond placer mine in Tancheng County, Shandong Province, there are 23 diamond mines in the country (including: 5 large mines, 5 medium-sized mines, 13 small mines; The country has diamond mineral reserves of B+C+D grade 4

179kg (equivalent to 20,000 ct), of which B+C grade mineral reserves are 1 equivalent to 10,000 ct).

Emery is also called rust removal sand polishing sand, brown corundum, black corundum, white corundum, silicon carbide collectively referred to as corundum, is made of three raw materials of alum leakage, carbon materials, and iron filings in the electric furnace through melting and reduction of artificial corundum, so it is named. The main chemical composition of emery is Al2O3, and its content is in, and it contains a small amount of Fe, Si, Ti, etc.

Emery, also known as carbon silicide, silicon carbide is made of quartz sand, petroleum coke (or coal coke), and wood chips as raw materials through high-temperature smelting in a resistance furnace. Emery wear-resistant ground is the difference between other floors, he has to be constructed with concrete, after the construction of the ground can be used normally, because the emery wear-resistant ground can be prepared with a variety of colors to meet the requirements of the enterprise plant floor beauty, so it is used in the plant, workshop and other occasions. So what are the classifications of emery?

1. It is divided into three categories: coarse, medium and detailed. Among them, the coarse mesh is black and red, the middle mesh is light red, the fine mesh is red and white, the particle size is uniform, the particle shape is uniform, the edge is called the angle crystal, there are sharp edges, and the grinding force is high.

2. For stone industry grinding marble and other soft materials.

3. Glass industry grinding glass burrs, TV picture tubes, optical instruments, lenses, prisms, clock glass, etc.

4. Sandblasting, rust removal and grinding in metal industry. Printing industry grinding offset plates, as well as light industrial processing of plastic samples, leather, sandpaper and other uses.

5. The grinding force of natural corundum is slightly lower than that of electric furnace white corundum, but its toughness is strong, and it has the characteristics of shell-like segmentation, and its advantages are that the finish of the grinding parts is high, and the sand marks are few and shallow. The grinding surface is fine and uniform, which can improve the quality of the product, which is the unique feature of this product. The grinding time of natural emery is short, the benefit is high, and it is cheap, which can make up for the lack of short life.

Emery aka silicon carbide (SiC) is.

It is made of quartz sand, petroleum coke (or coal coke), wood chips (salt needs to be added when producing green silicon carbide) and other raw materials through high-temperature smelting in a resistance furnace.

Silicon carbide is also found in nature with a rare mineral, moissanite. Silicon carbide is also known as moissanite. Among the contemporary non-oxide high-tech refractory raw materials such as C, N, and B, silicon carbide is the most widely used and economical one, which can be called gold steel sand or refractory sand.

If it is a general term, then there are white corundum, brown corundum, corundum, and silicon carbide below.

In general, emery refers to silicon carbide. Silicon carbide is a non-metallic carbide covalently bonded by silicon and carbon elements, second only to diamond and boron carbide in hardness. The chemical formula is SiC.

Colorless crystals, blue-black when oxidized or containing impurities. A variant of silicon carbide with a diamond structure is commonly known as emery. The hardness of emery is close to diamond, and the thermal stability is good, and it is transformed from -silicon carbide to -silicon carbide at 2127, and -silicon carbide is still stable at 2400.

It is stable for aqueous hydrofluoric acid solution and concentrated sulfuric acid, but unstable for mixed acid or phosphoric acid of concentrated hydrofluoric acid and nitric acid. Alkali differentiation that is molten in an empty atmosphere. It is divided into synthetic silicon carbide and natural silicon carbide.

Natural silicon carbide is called moissanite, which occurs in kimberlite and volcanic amphibole, but its amount is very small and has no mining value.

Emery, also known as carbon silicide, silicon carbide (SiC) is made of quartz sand, petroleum coke (or coal coke), and wood chips as raw materials through high-temperature smelting in a resistance furnace. Silicon carbide is also found in nature with a rare mineral, moissanite. Silicon carbide is also known as moissanite.

Among the contemporary non-oxide high-tech refractory raw materials such as C, N and B, silicon carbide is the most widely used and economical. It can be called steel grit or refractory sand. Silicon carbide is made of quartz sand, petroleum coke (or coal coke), wood chips (salt needs to be added when producing green silicon carbide) and other raw materials in a resistance furnace by high temperature.

At present, China's industrial silicon carbide is divided into black silicon carbide and green silicon carbide, both of which are hexagonal crystals, with a specific gravity of 2840 3320kg mm2.

There are two kinds of emery, one is man-made and also called silicon carbide, and the other is natural, also called garnet. Let's talk about these two substances separately. First of all, natural emery garnet is a non-metallic abrasive, the hardness is different according to the content of iron and aluminum, from the have, the color is also different.

There are black, green, and red. The main uses are sandblasting and rust removal surface pretreatment, water-cutting abrasives, emery floor aggregates and sewage treatment filter materials (i.e., garnet filter media). Since it is a natural mineral, the ** of natural corundum is also cheap.

Artificial emery, also known as silicon carbide, has a molecular formula of SiC, which is divided into green and black. Among them: black silicon carbide is made of quartz sand, petroleum coke and high-quality silica as the main raw materials, and is smelted at high temperature through a resistance furnace.

Its hardness is between corundum and diamond, its mechanical strength is higher than that of corundum, and it is brittle and sharp. 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 through a resistance furnace. Its hardness is between corundum and diamond, and its mechanical strength is higher than that of corundum.

So what are the main uses of silicon carbide?

1. Abrasives - mainly because silicon carbide has high hardness, chemical stability and certain toughness, so silicon carbide can be used to manufacture consolidated abrasives, coated abrasives and free grinding, so as to process glass, ceramics, stone, cast iron and some non-ferrous metals, cemented carbide, titanium alloy, high-speed steel tools and grinding wheels.

2. Refractory materials and corrosion-resistant materials are mainly --- because silicon carbide has a high melting point (degree of decomposition), chemical inertness and thermal vibration resistance, so silicon carbide can be used in abrasives, ceramic products in the firing furnace of shed plates and sagger, zinc smelting industrial vertical cylinder distillation furnace for silicon carbide bricks, aluminum electrolytic cell linings, crucibles, small furnaces and other silicon carbide ceramic products.

3. Chemical use - because silicon carbide can be decomposed in molten steel and react with ionic oxygen and metal oxides in molten steel to form carbon monoxide and silicon-containing slag. Therefore, it can be used as a purification agent for smelting steel, that is, as a deoxidizer for steelmaking and a microstructure improver for cast iron. This generally uses low-purity silicon carbide to reduce costs.

At the same time, it can also be used as a raw material for the manufacture of silicon tetrachloride.

4. Electrical use - used as heating element, nonlinear resistance element and high semiconductor material. Heating elements such as silicon carbon rods (suitable for all kinds of electric furnaces working in 1100 and 1500), nonlinear resistive elements, and various lightning protection valves.

5. Other far-infrared radiation coatings or silicon carbide sheets are used in far-infrared radiation dryers.

Emery is a type of sand that can hold water, and a layer of emery is laid under the lawn soil to keep the water from flowing down the ground and keep the lawn green.

Emery is a colorless and transparent crystal, also known as silicon carbide, which is smelted at high temperature by a resistance furnace with raw materials such as quartz sand, petroleum coke, and wood chips. Industrial emery is light yellow, green, blue and even black due to the different types and contents of impurities it contains, and the transparency varies with its purity. The crystal structure of emery is divided into -SiC of hexagonal or rhombohedral and -SiC of cube (called cubic silicon carbide).

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 becomes -sic when it is above 2100. The industrial manufacturing method of silicon carbide is to use high-quality quartz sand and petroleum coke in a resistance furnace.

The silicon carbide blocks obtained are crushed, acid and alkali washing, magnetic separation and screening or water separation to make products of various particle sizes.

Silicon carbide ceramics, one of the products of emery, have the characteristics of high hardness, high corrosion resistance and high high temperature strength, which makes silicon carbide ceramics widely used.

Emery.

It is also called rust removal sand

Polished sand, brown corundum, black corundum, white corundum, silicon carbide collectively referred to as emery, is made of bauxite, carbon materials, iron filings three raw materials in the electric furnace through melting and reduction of artificial corundum, hence the name. The main chemical components of emery are:

Al2O3, the content of which is in, and contains a small amount of Fe, Si, Ti, etc.

Emery is generally used for sandblasting and rust removal and flooring.

(1) Sandblasting and rust removal of steel structures, hulls, bridges, etc.; (2) Waterjet cutting of metal, stone, glass, etc.; (3) Filter media for chemical, petroleum, pharmaceutical, and water treatment; (4) Grinding of marble, optical lenses, glassware, leather and other materials; (5) Raw materials for grinding wheels, oil stones, abrasive cloths and sandpaper; (6) Wear-resistant materials such as highway pavement, airstrip, wear-resistant rubber, and anti-slip paint; (7) Widely used in the field of construction industry, high-grade real stone paint, exterior wall decoration, interior decoration, noble and elegant temperament. Ideal for a new type of non-metallic wear-resistant floor aggregate.

Natural emery, also known as garnet sand, is a silicate mineral. The hardness is very large, the particle size of various mesh is uniform, the particle shape is uniform, the edge is called the angle crystal, there are sharp edges, and the grinding force is high. The range of applications is very wide:

Waterjet cutting such as metal, stone, glass, etc.; grinding of materials such as marble, optical lenses, glassware, leather, etc.; metal industrial sandblasting, rust removal; Rizhao Garnet Mining Co., Ltd. is a comprehensive enterprise integrating garnet sand ore mining and processing, and constantly improving product quality, and garnet sand is more widely used at present.

Emery is made of bauxite and coke (anthracite) as the main raw materials, smelted at high temperature in the electric arc furnace, and the abrasive tool made of it is suitable for grinding with high tensile resistance.

Emery is called industrial teeth: mainly used in refractory materials, grinding wheels, sandblasting.

1. It is used in the manufacture of high-grade refractory materials, castables, refractory bricks, etc.

2. Sandblasting - abrasive hardness is moderate, high bulk density, no free silica, specific gravity, good toughness, is an ideal "environmentally friendly" sandblasting material, widely used in aluminum profiles, copper profiles glass, washed denim precision molds and other fields;

3. Free grinding - grinding grade abrasive, used in the free grinding of picture tubes, optical glass, monocrystalline silicon, lenses, clock glass, crystal glass, jade and other fields, is a high-grade grinding material commonly used in China;

4. Resin abrasives - the abrasives have suitable color, good hardness, toughness, suitable particle section type and cutting edge retention, and are applied to resin abrasives with ideal results;

5. Coated abrasives - abrasives are raw materials for sandpaper, gauze and other manufacturers;

6. Functional filler - mainly used for automobile brakes, special tires, special building products, etc., which can be used as a highway road surface.

Airstrip. Dock. Parking lot. Industrial flooring. wear-resistant materials such as sports venues;

7. Hydraulic cutting - it is a new, environmentally friendly and safe cutting method that uses abrasive as the cutting medium and relies on high-pressure hydraulic jet for basic cutting, which is applied to the cutting of oil (natural gas) pipelines, steel and other components.

Emery (corundum abrasives) is mainly made of bauxite, carbon materials, and iron filings through melting and reduction in electric furnaces, and the main component is Al2O3, the content is in, and it also contains a small amount of Fe, Si, Ti and other impurities.

Silicon carbide is mainly made of quartz sand, petroleum coke, coal coke, and wood chips as raw materials and smelted by high-temperature resistance furnaces. The main component is SiC, the content is more than 95%, it is a hexagonal crystal system, the specific gravity is, and the microhardness is 2840 3320kg mm2.

Emery is mainly used for refractory materials, grinding wheels, sandblasting polishing and grinding, etc., and is subdivided into sandblasting, free grinding, resin abrasives, coated abrasives, functional fillers, filter media, etc.