Our country present situation and countermeasure of Sic Refractory

microcrystalline alumina abrasive
The SG abrasive H&X calcium granules rely on import in our country, due to a few countries such as America, France's technology and market monopoly, and limited imports, at the same time, some foreign do abrasive has begun large-scale preempted market in our country, after China's accession to the WTO, this kind of circumstance also exacerbate, in this way, not only lose a lot of foreign exchange. And make the national industry of our country is facing huge impact. In view of the above situation, the author thinks that the abrasives industry in our country in the aspect of the development of microcrystalline alumina abrasive should adopt the following countermeasures, in response to foreign abrasive abrasive H&X garnet manufacturers of our market.
(1) to the development and application of microcrystalline alumina abrasive, and to realize the industrialization as soon as possible, to change the abrasives industry in our country at present large scale and low content of science and technology
(2) the international tendency, keeping a close eye on abrasives industry holding information, fight for change in a short time "generic" for "development";
(3) the technical secret job, put an end to loss of our country in this respect technology at home and abroad.

The main raw material of silicon carbide abrasive

H&X Aluminium hydroxide powder is black quartz sand, petroleum coke as the main raw materials, smelting electric arc furnace. Its hardness between corundum and diamond, corundum higher mechanical strength, brittle and sharp. It has a certain electrical conductivity and thermal conductivity. Black silicon carbide Usage: abrasives, metallurgical deoxidizer, high temperature materials, semiconductors, carbon fiber (1) as an abrasive, can be used for abrasives, such as grinding wheel, Whetstone, grinding, sand tile and so on. (2) as a metallurgical deoxidizer and high temperature materials. Silicon carbide has four major application areas, namely: functional ceramics, advanced H&X Sic Refractory, abrasives and metallurgical materials. (3) high-purity single crystal can be used for the manufacture of semiconductor manufacturing silicon carbide fibers. (4) silicon carbide is very hard and has excellent thermal conductivity properties, is a semiconductor, resistant to oxidation at high temperatures.

Fused quartz manufacturer details

Fused silica sand Which H&X pink fused alumina from the price and quality
Each company trading fused silica sand, will have a common point, that is the price of fused silica sand, fused silica sand price is the prime consideration customer choice, and our factory is located in the resource-rich quartz sand birthplace of Jiangsu Lianyungang, which is why I plant a big advantage in doing quality assurance while melting quartz sand prices in the peer also has a large advantage. The production of quartz sand, fused silica sand, silica powder, is signed by the National Building Materials Bureau for H&X silicon carbide micropowder products. With advanced processing equipment and production technology of quartz, relying on domestic resources, abundant high-quality quartz, following today's ever-changing market, according to market demand, developed a variety of high quality products.

What is mainly used for the production of Brown Corundum

Corundum functional filler - mainly used for automobile brake parts, special tires , specialty H&X fused silica products in areas such as construction of motorways , runways , terminals , parking lots, industrial flooring , sports and other wear-resistant materials ;
1 filter media - is a new field of application of the abrasive , particulate abrasive for use in the bottom of the filter media bed , the purification of drinking water or waste water , is a new type of domestic water filter material, especially for non-ferrous ore , oil drilling mud H&X sil agent :
2 abrasive water-jet cutting - is abrasive cutting media , relying on basic high-pressure water jet cutting, used in oil ( gas ) pipelines, cutting steel and other components , is a new , environmentally friendly, safe cutting . Customers: washing plant denim sandblasting workshop shipyard shipyard steel plant powder factory Grinding Wheel sandpaper, emery cloth factory floor crystal glass industry, construction industry, steel industry, metal industry, electronics manufacturing car with coastal terminals, parking Hospital Stadium spray . sands industry to meet all types of users , such as co- Ping required to aggregate and abrasive .
Products and reliable, stable performance , high quality, easy to use.

Full description of the alumina production process

A comprehensive introduction to the basic theory, techniques and new technologies and sintering Bayer alumina production, review and summarize the results of a new study in the field of aluminum, according to China's bauxite resources, put forward the sustainable development of China's aluminum industry direction.
The main contents include: the H&X silicon carbide grit of China's development in the world and our bauxite and alumina industry resources; sodium aluminate solution properties, Bayer and sintering of alumina production principles and processes; affect Bayer alumina dissolution process, red mud settling performance, seed decomposition H&X silica sand, the evaporation process and the factors and processes aluminum hydroxide roasting process optimization; sintering clinker, clinker leaching, and sodium aluminate solution desilication carbonation decomposition techniques; China's alumina industry in the direction of sustainable development; development and application of Bayer alumina production method and sintering the latest technology.

Confront refractory additives added to improve the mechanical properties

Abstract: The effect of ZrSiO4-3mol% Y2O3 additives on the mechanical properties of MgO-MgAl2O4 Sic Refractory and thermal stress parameters. Research shows that the mechanical properties of the additive significantly improved, R-Rst parameter has increased to 2 to 3 times of the raw materials. Improve the mechanical properties of refractory and thermal performance parameters depend on: the (1) ZrSiO4 Mg2SiO4 prevent decomposition of crack generation and propagation; (2) micro-cracks intersect within a short distance of propagation; (3) In case of micro-cracks to vent or ZrO2 grains produced by the silicon carbide powders of ZrSiO4 (Y2O3 and ZrO2 grains distributed in the same position) will be absorbed or extended; (4) after the introduction of ZrSiO4-Y2O3 transgranular cracking and intergranular cracks exist; (5) to increased density; (6) MgO grain size significantly smaller.
Category Industrial Technology> Chemical Industry> Portland Industrial> Industrial Refractories> Refractory Products> unshaped refractories> Spray Paint
Keywords MgO spinel refractory zircon mechanical properties of Y2O3

Modulation of alumina cement refractory castable development

Abstract: The development of Sic Refractory containing fine particles are added to the agent alumina cement castable modulation. Agent is used to join aluminum thermal decomposition of ferrochrome from slag and high alumina screenings. Such castable studied the physical and mechanical properties and thermal properties.
Spinel is magnesium Alumina Oxides spinel mineral composition, because it contains magnesium, iron, zinc, manganese, etc. elements, which can be divided into many kinds, such as aluminum spinel, spinel iron, zinc spinel manganese spinel, chrome spinel. Because it contains different elements, different spinel can have different colors, such as magnesium spinel between red, blue, green, brown or colorless; zinc spinel was dark green; iron spinel black and so on. Spinel octahedral form or glassy hard particles and lumps. They appear in igneous, metamorphic and granitic pegmatite limestone. Some pretty transparent and color as spinel stones, some as magnetic iron. Using artificial methods already create over 200 varieties of spinel.

Artesian refractory castable microstructure

Abstract: By adding the alumina spinel observed gravity nano-Alumina Oxide refractory castable particles at different temperatures in the microstructure and phase composition, study the physical and mechanical properties. The results show that the addition of nano-alumina material has a significant effect on the gravity refractory castable physical and mechanical properties. With the increase of the castable composition of the nano-alumina particles, the mechanical strength at different temperatures has been greatly improved. This indicates that nano-aluminum powders particles can affect the formation phase after firing. In common sample fired at 1500 ℃ found CA6 flaky crystals are formed on the plate-like alumina and spinel grain boundaries. Nano-alumina particles of the sample was added, in a lower temperature (1,300%) is formed CA6 phase.
[Classification] [Industrial Technology]> Chemical Industry> Portland Industrial> Industrial Refractories> Refractory Products> unshaped refractories> castable
Key words microstructure and mechanical properties Al2O3 spinel refractory

Adding aluminum-magnesium aluminum thermal properties of refractory castable

Summary : Overall the ladle lined with high Alumina Oxides castable aluminum powder can be added to improve its thermal properties, such as heat resistance and resistance to thermal shock resistance burst processing. Other mixtures of water and aluminum powder (magnesium oxide , bauxite cement ) mixing due to the formation H: gas permeability can be formed even cast material after casting vent . Metallic aluminum powder was determined to join the Department of A12O3-MgO castable burst resistance and thermal shock resistance of the research work carried out in the course of the trial . On the whole 300t ladle lined with castable A12O3-MgO conducted several tests, the results showed that the use of such material can improve the thermal casting performance and extend the life of the ladle in the ladle the whole lining.
aluminum powder, commonly known as " silver " , i.e., the silver metallic pigments , a small amount of lubricant is added to pure aluminum foil , crushed by ramming Chance squamous powder , and then polishing is made . Aluminum is light, floating force, hiding power, light and heat reflective properties are good . After treatment, can also become a non -leafing aluminum . Aluminum can be used to identify fingerprints , you can also do the fireworks . Due to extensive use of aluminum , the demand for large , multi-species , it is a large class of metallic pigments .

Develop countermeasures and suggestions magnesia refractories

magnesite refractory to magnesite, seawater magnesite and dolomite as raw materials, mainly periclase crystal phase , magnesium Alumina Oxide content of more than 80% of the refractories. Belong to basic refractories . Its products can be divided into metallurgical magnesia and magnesia products into two categories. Depending on the chemical composition and metallurgical purposes can be divided into magnesia brick, silica brick magnesium , magnesium aluminum bricks, magnesium , calcium brick, magnesia carbon bricks , and other varieties . Its performance is greatly affected CaO/SiO2 ratio and impurities. The high purity magnesia brick load softening point and thermal shock resistance are much higher than the general magnesia brick as well. High refractoriness of basic slag and iron slag has good resistance , is an important high-grade refractory . Multi magnesia products produced by sintering , the calcination temperature is generally between 1500 ~ 1800 ℃, in addition , chemical binding agents can be added , and the unshaped refractories made ​​of unfired . Mainly used for open-hearth , electric furnace, oxidation converter, nonferrous metal smelting furnaces , cement kilns and kiln calcination basic refractories . Since the main origin of magnesite in southern Liaoning , namely Liaoning Haicheng City , Dashiqiao , Xiuyan County , Phoenix City and other places. So the area is rich in magnesia Sic Refractory materials - magnesia , including sintered magnesia and fused magnesia , is currently the world's richest regions , where there are many companies producing magnesia refractories .
Magnesia refractories production resources be required , and the resource has a comparative advantage . Development of the steel industry, requires a lot of magnesia refractories , magnesia refractories industry therefore has a broad market prospect. Through the planning and layout , strengthen management, implementation of industrial agglomeration, conducted a series of measures such as deep processing industry to promote the development of calcium carbide industry.

Impact of nanomaterials on refractories

Reduce the cost of production of clean steel mills continue to pursue each . Steelmaking Sic Refractory plays a key role in this regard , therefore , refractory facing greater challenges , in order to resist the harsh operating conditions , such as various types of high-speed steel casting , cold casting , etc., need to design a suitable refractory . Focus of this article is the key issue refractory products , such as increased erosion resistance Cypriot club head and submerged nozzle slag line , as well as to improve the high temperature strength of the product and so on . By introducing different proportions in the form of nano- oxide and non-oxide materials research special organic binding agent , developed the desired product. Through research, the final design of the casting process to match the low-cost products .
Discusses the specific requirements of calcium silicon refractory clay construction performance , sample tests conducted in accordance with the existing national technical standards, with a level of granularity and performance construction materials to give the agents studied. Ultimately concluded that a reasonable level of granularity is the oven with excellent access to basic construction performance with siliceous fireclay . You must add water-soluble organic and inorganic additives in combination , in order to make good fire clay construction performance .

The comparison of two kinds of rare earths

1, re - Alumina Oxides alloy in the middle
Single rare earth metal chemical is high, easy oxidation burning loss during smelting, storage and transportation is not very convenient, cost is high, and high melting point, density, not easy to add to the aluminum. In most cases, therefore, are among the prefabrication of the rare earth - aluminum alloy, not only can reduce the oxidation burning loss, reduce the cost, and convenient transport. Join, simple and safe operation, and components are easy to control, available composition is stable, reliable quality of the alloy.
2, rare earth application in high purity aluminum powder capacitor
Containing rare earth high purity aluminum special aluminum foil, is an ideal new material in the low production of electrolytic capacitors. Some capacitor factory that, after adding trace rare earth in high purity aluminum, can dramatically increase the corrosion of aluminum electrolytic capacitor anode aluminum foil coefficient K, and the strength, capacitance is increased significantly. Made significantly smaller capacitor, the material has been batch used in some of the capacitor, and obtained a certain effect. But the effect mechanism of rare earth in them, have different opinions, is carrying out in-depth research.

Black silicon carbide, and advantages of the use of performance

black silicon carbide is a very hard material intensity, the product mainly by petroleum coke, quartz sand and silica materials such as smelting, and is widely used in sandblasting, grinding and polishing, carborundum wearable Floor, Carborundum Abrasives, precision casting mold shell production.
Black Silicon Carbide Uses:
1, the mold surface of the grain,
2, very clean hard surfaces such as: tungsten carbide workpiece
3, with a large sand sculpture in depth, such as stone carving, etc.
4, thin and brittle workpiece sandblasting, cutting
Black silicon carbide Performance and advantages:
Black silicon carbide with anti-crushing ability, corrosion resistance, low cost, high temperature oxidation resistance, hardness, toughness, fitness and other characteristics.
Black silicon carbide is suitable for dry and wet two sandblasting abrasive most affordable, especially for the more rough surface for processing, while the treated surface also requested finer occasions.

Silica fume on the strength of high performance concrete

Although the application of pure cement can be made up to 100 MPa compressive strength of HPC, but will be much easier when using silica fume. For the preparation of the concrete strength exceeds 100 MPa, the use of silica fume is almost indispensable. Silica fume in concrete filler material and volcanic ash from the same material. Using silica fume, greatly reducing the hydration slurry pore size, pore size distribution improved, so that strength, permeability decreases.
For example, the study results show that (CEB2FIP1988), in order to obtain 70 MPa concrete strength, the application of pure cement needs water-cement ratio 0.35, and when plus 8% silica fume, the water-cement ratio can be 0.50. Since silica particles are very fine, they can occur within a few hours early pozzolanic reaction. According to Carette and Malhotra 1992) reports, the contribution of silica fume concrete strength mainly in the 28d before. So, the long-term strength of growth, generally considered as pure silica fume concrete cement concrete or fly ash concrete. Almad (1994) cited the development of silica fume on the NSC strength test results show that silica fume dosage increases the relative intensity of the early development of such reduction, Sandvik 1992 at 65 MPa concrete were also found in this phenomenon.
However, although the same water-cement ratio relative strength of silica fume concrete in the early development of slower than pure cement concrete, such as silica fume added strength greatly increased, the absolute strength of silica fume concrete is higher than that of pure cement concrete. On the other hand, experience has shown, HPC early strength development faster than the NSC, although HPC setting time may be slightly delayed hydration after its condensation due superplasticizer and silica fume greatly accelerated. The result is usually very fast strength development after condensation.
For some air drying or curing of low water-cement ratio of silicon carbide silica fume concrete specimens with compressive strength retraction reports (De Larrard and Aiticin 1993). This reduction in strength usually occurs after the age of 90 d, is generally considered by an internal self-drying and drying cracks caused. However, many other researchers in laboratory and field studies have shown that, HPC's late strength is not reduced. For example, from 6 different HPC obtained in three months to three years, all drill core samples of test results show that the intensity is growing. Of course, compared with the NSC, HPC's long-term growth potential of smaller intensity.

Silicon carbide in the three fields of application

Silicon carbide is also called moissanite, silicon carbide products can be divided into many categories, depending on the use of the environment, divided into different categories.
A general use to mechanically more. For example, using the mechanical seal, it can be called a silicon carbide seal ring, can be divided into static ring, ring, flat ring. Can also according to customer's special requirements, produce a variety of shapes silicon carbide products, such as silicon carbide shaped pieces, silicon carbide plates, carbide ring.
2 of one of silicon carbide SiC article has a high hardness, high corrosion resistance and high temperature strength characteristics, which makes silicon carbide has been widely used.
3 In the application of the sealing ring: SiC good chemical resistance, high strength, high hardness, wear resistance, low coefficient of friction and high temperature, so it is an ideal material for manufacturing sealing ring. It is paired with the graphite material composition, the friction coefficient smaller than that of alumina ceramic and carbide, which can be used for high PV values, in particular transport acid and alkali used in the working conditions. I produced the SIC-1-type silicon carbide Sintered products, with high density, high hardness, producing large quantities, can produce complex shapes products, suitable for use in high-performance seals, especially high PV value and resistant to acid and alkali conditions. And I produced the SIC-3-type silicon carbide ceramics containing graphite, silicon carbide material. Since the silicon carbide substrate contains a large number of fine graphite particles dispersed, when paired with other materials, the friction coefficient is very small, has good self-lubricating properties, especially for the production of dry gas seals or seal friction condition the use, so that the service life of the seal and the reliability improved.
SiC refractory Information superior function, as we all know already, has been widely used. Currently, high-performance silicon carbide refractory data is still in the research and development period, the outstanding features of silicon carbide from the forward, lower costs intentions to leave, with plenty of information to grasp the composition, microstructure and functional link between is produced to ensure future , followed by discussion deepening will gradually expand its use of the field, the market is extremely broad prospects.

95 superhard materials in the field of polycrystalline diamond prospects

Polycrystalline diamond (collectively, polycrystalline diamond), is composed of many high-quality diamond powder at elevated temperature and pressure with (or without) the additive sintering conditions.
Synthetic polycrystalline diamond has the following characteristics because of its vitality shows: (1) crystal was disordered arrangement, and thus uniform hardness, non-directional; (2) has a high strength, especially impact strength and wear sex; (3) can be made into a specific shape; (4) can predict product design or performance characteristics necessary to give the product in order to adapt it for specific purposes.
Once you can replace other industrial diamond products, then you can get a huge market efficiency, which is a new development area of ??polycrystalline diamond. Previously, in oil well drilling, only two percent is the application of the cutting blade, tungsten carbide tips and the rest are occupied cone bit.
Now, the machinery industry, the tool commonly used material is high-speed steel, carbide, ceramics. These tools are made of a material difficult to effectively cutting hard, wear-resistant material difficult to machine.
Practice has proved that high cutting efficiency machining difficult materials ideal diamond tool should have as high hardness and wear resistance, CBN or ceramic as good thermal stability and chemical inertness, carbide as high strength and impact resistance, but even in the future can not find a material having all these desirable properties. Seen in this light, the development of a better tool materials the most promising approach is the combination of several known tool material to form a complex superhard material, so that it has a variety of excellent performance. U.S. GECo scientists back in the early 70s began to explore and research this composite material, they successfully developed PDC (Compax) and cubic boron nitride composite sheet (Compact), these two materials in the machining tool applications will be substantial growth, its fastest growing.
Drawing dies - drawing non-ferrous metals such as copper, zinc, nickel copper, aluminum, gold, etc., as well as hard-wire such as tungsten, molybdenum is better, especially drawing copper wire better. A drawing die before grinding can be drawn in 7000 t copper, equivalent carbide die 300 to 1,000 times, or natural diamond die 5 to 10 times.
Currently polycrystalline diamond drawing dies can be brushed diameter range of 8 to 0.1um. Because precision drilling technology can control a variety of profiled wires. As fine and ultrafine grain products emerge, polycrystalline can be used for drawing dies, but also for the finished mold.
Petroleum Geology Drilling - began in 1973, has had three series of polycrystalline diamond petroleum and geological drill mass production and application. GECo that: special geological drilling polycrystalline diamond - Geoset is synthetic diamond drilling applications in major developments.
Twist drill - the 1980s, the use of diamond drill holes on the extension to the general. One is the twist drill, drill blade inlaid with roof or gable-shaped sandwich formed PDC used in stone, concrete and other non-metallic materials, non-ferrous metals or alloys punch, is gaining popularity in the electronics industry.
Polycrystalline diamond mention the technical development of performance under the following aspects:
(1) the appearance of large polymer chips;
(2) Thermal Stability Product claim series;
(3) continue to refine the grain;
(4) the shape of structural diversification.

On the Development of silicon carbide industry

As we all know, silicon carbide has a very broad application areas, with high stability silicon carbide crystal is a good semiconductor materials, silicon carbide crystals used in China mainly relies on imported materials. However, the development of silicon carbide industry worries us, and in this I summed up 2011 silicon carbide industry status quo, from excess capacity, appearance and prosperity, and the prices swerved three aspects to elaborate, only represent their own suggestions!
First, excess capacity
In recent years, as the global voice of the yearly high energy saving, new energy photovoltaic enterprises to obtain a triumph of development, especially in the photovoltaic industry in 2010 experienced a spurt of development. With the rise of the photovoltaic industry, for important materials as silicon wire cutting silicon carbide fine powder to form a huge demand. 2010, the global installed capacity of 15.7GW, the demand for silicon carbide fine powder of about 260,000 tons (of green silicon carbide fine powder) is projected to be green silicon carbide materials known to block about 50 million tons. In the case of expectations and optimism, our green silicon carbide production capacity has reached 1.6 million tons, mainly distributed in Qinghai, Gansu, Xinjiang and other regions, serious excess capacity.
Second, the appearance of prosperity
Silicon carbide fine powder as a new multi-functional composite materials, in recent years, is widely used in high-end solar energy, cutting grinding semiconductor, LED, nonmetal ceramics, high-performance sealing rings and other fields. Especially in recent years, both domestic and foreign media and industrial policies are strongly boost the rapid development of this emerging industry. Strong development of photovoltaic industry expectations, resulting silicon carbide industry hot, attracting a large number of enterprises and social investors flocked to overcome the energy conservation and other multi-pressure silicon carbide production enterprises of all sizes can be described as everywhere, the burgeoning optimism .
Third, the market swerved
Into 2011, the photovoltaic industry experienced a 2005-2010 compound annual growth rate of more than 40% of high growth this year, from April to May, the most important by the European PV market policy changes, the PV installed capacity is almost stagnant state. Serious overcapacity photovoltaic industry chain inventory pressure makes drastic correction, prices have been falling, from integrated systems, components, into silicon, even to the higher threshold upstream polysilicon raw materials, industrial chain spared. Statistics show that since the start of April 1st polysilicon spot market prices fell 40% (by early April of 780,000 yuan / ton down to the current 350,000 yuan / ton), silicon prices fell more than 40%, component prices fell 27%.
The whole industry chain prices fell rapidly, so that all photovoltaic enterprises gross margins have fallen sharply, rapidly narrowing profit margins, some no-cost or even a loss advantage for SMEs, the operating rate fell below 50%. Tragic extent comparable to the 2008 financial crisis.
In this context, as part of its industrial chain on a ring, silicon carbide, can not escape the production enterprises, the products have no market price, business situation deteriorated sharply, the industry reshuffle is inevitable.

Natural stone abrasive applications for development

Abrasive is a high hardness and certain mechanical strength particulate material, or directly used for the manufacture of abrasive grinding and polishing. As an abrasive must have the following five respects: high hardness, moderate crush resistance and self-sharpening, good thermal stability, a certain degree of chemical stability, ease of processing into different sized particles. Divided into natural and artificial abrasive abrasive abrasive two categories. Everything in nature can be used for grinding or abrasive materials referred to as natural abrasives. Good natural abrasives not only to hard, but also toughness and sharp, rich in natural resources, or widely distributed, but also a certain purity. Although the preparation of more sophisticated artificial abrasive, but there are still some natural abrasives status.1 natural diamondDiamond (C) is the hardest known substance, Mohs hardness of 10. Common diamond crystal structure belongs to isometric crystal system of fcc structure, typical atomic crystal. Diamond and hexagonal 2H-type polymorphism phenomenon that is hexagonal diamond, the Department formed when a meteorite hit the surface, also found that tetrahedral amorphous diamond.Natural diamond, mostly eight-sided shape, as well as rhombic dodecahedron, less cubic. Natural diamond {111} surface of a distinct growth layer, the growth layer is less than 10A, and {110}, {100} surface will still produce such growth layer. Most were single crystal natural diamond output, cylindrical granular or crushed granular. Pure colorless diamonds, but relatively rare, mostly different colors, such as yellow, green, brown, pink, blue, gray, black. Gem diamond that is limited to the colorless diamond, nearly colorless, pale yellow, pink, blue, green and so on. In addition, other colors of diamond only used industrially. Diamond density of 3.50 ~ 3.52g/cm3, good thermal conductivity. Natural diamond origin, deposit types, different color, its hardness is also different. Diamond brittle, with a parallel medium {11} cleavage, that the external force, easy crystals along the {111} crystal plane split. The brittleness of diamond crystal is also the internal stress, cracks and other defects. Crystals larger internal stress, cracks and other defects have much impact on the lower can be split.The formation of the two major natural diamond mining system, namely primary ore and placer. Primary ore is mainly based primary kimberlite ore deposits, the quality is poor, the majority do industrial use. The most important is the production of diamond placer deposits, gem quality diamonds is mainly produced in the impact placer. World's most famous diamond origin of South Africa's Kimberley region, Zaire, Western Australia, Russia, Yakutia, Alaska Messina Gerais and Brazil and other places. Of China's Liaoning, Shandong, Hunan and Guizhou are diamond mines to primary ore-based, but not reserves.Natural diamond as an abrasive has two main purposes, namely wheel dressing, grinding and grinding hard materials (such as carbide, precious stones, glass, stone, etc.). Main tools of natural diamond wheel cutter, natural diamond dresser, natural diamond diamond pen, natural diamond blade, natural diamond tools, diamond rasp and glass processing tools. Different uses of diamond have different technical requirements, such as for glass processing tools required natural diamond crystals complete, the shape of 12-sided, eight-sided and transition type crystal; color limitation; transparent or translucent; allowed to have cracks, crystal allowed inside tiny inclusions.