Uses of brown corundum: Brown corundum is called the teeth of industry: mainly used in refractory materials, grinding wheels, sandblasting.
1. Used to manufacture high-quality refractory materials, castables, refractory bricks, etc.
2. Sandblasting--The abrasive has moderate hardness, high bulk density, no free silica, high specific gravity, and good toughness. It is an ideal "environmentally friendly" sandblasting material, widely used in aluminum profiles, copper profiles, glass, washed jeans, precision molds and other fields.
3. Free grinding--grinding-grade abrasives are used for free grinding in the fields of cathode ray tubes, optical glass, single crystal silicon, lenses, watch glass, crystal glass, jade, etc., and are high-quality grinding materials commonly used in China.
4. Resin abrasives--The abrasives have suitable color, good hardness, toughness, suitable particle section type and edge retention, and are used in resin abrasives with ideal results.
5. Coated abrasives - Abrasives are the raw materials of sandpaper, gauze and other manufacturers, such as brown corundum segments.
6. Functional fillers - Mainly used in automobile brake parts, special tires, special building products, etc. It can be used as wear-resistant materials for the construction of highway pavements, runways, docks, parking lots, industrial floors, sports venues, etc.
7. Filter media - It is a new application field of abrasives. It uses granular abrasives as the bottom medium of the filter bed to purify drinking water or wastewater. It is a new type of water filtration material at home and abroad, especially suitable for non-ferrous metal beneficiation, oil drilling and mud weighting agent.
8. Hydraulic cutting - It uses abrasives as cutting media and relies on high-pressure hydraulic jets for basic cutting. It is used for cutting oil (natural gas) pipelines, steel and other parts. It is a new and environmentally friendly cutting method
Due to its excellent high temperature properties and mechanical strength, corundum has been widely used in many industrial fields such as metallurgy, machinery, electronics, aviation and national defense. Its main uses are as follows.
1. Due to its high temperature resistance, corrosion resistance, high strength and other properties, it is used as a sliding nozzle for pouring steel, smelting rare and precious metals, special alloys, high-purity metals, glass drawing, crucibles and utensils for making laser glass: various high-temperature furnaces, such as refractory materials, ceramics, linings (walls and pipes) of iron-making blast furnaces; physical and chemical utensils, spark plugs, heat-resistant and anti-oxidation coatings. Low-silicon sintered corundum bricks with SiO2 less than 0.5% are special linings for carbon black, boron chemicals, fertilizers, synthetic ammonia reactors and vaporizers.
2. Due to its high hardness, good wear resistance and high strength, it is used as various reaction vessels and pipelines in chemical systems, parts of chemical pumps as mechanical parts, various molds, such as wire drawing molds, pencil core extrusion molds, etc. as tools, abrasives, bulletproof materials, human joints, sealing grinding rings, etc.
3. Due to its high-temperature insulation, it is used as a threaded tube and protective tube for thermocouples. The insulation is still excellent when used in atomic reactors. In addition, the loss is not large, and the dielectric constant is not large. It is widely used in the electronics industry for solid integrated electric furnace substrate tube sockets, shells, porcelain frames, micro-thin windows, missile radar antenna protection covers, etc.
4. A1203 is an ionic crystal with a very stable structure. When used at high frequency, high voltage and high temperature, its insulation is still excellent. In addition, the loss is not large, and the dielectric constant is not large. It is widely used in the electronics industry for solid extruded circuit substrate tube sockets, shells, porcelain frames, micro-glass windows, missile radar antenna protection covers, etc.
5. Corundum products have good airtightness and are airtight even at high temperatures. Therefore, they are widely used in electric vacuums, such as using corundum to make various large electronic tube shells and dual-in-line package shells in solid microcircuits.
6. Corundum insulation materials, such as corundum lightweight bricks, corundum hollow balls and fiber products, are widely used in the furnace walls and roofs of various high-temperature furnaces, which are both resistant to high temperatures and heat-insulating.
7. Transparent corundum products can be used to make lamps and microwave fairings. In addition, Na-b-A203 products are electrolyte materials for making sodium-sulfur batteries. Brown corundum, brown corundum morphology: Brown corundum is formed under high-temperature aluminum-rich and silicon-poor conditions. In endogenous action, it is produced in aluminum-rich, silicon-poor magmatic rocks and pegmatites, and coexists with feldspar, spinel, etc. In metamorphism, those produced in gneiss coexist with skarn, magnetite, muscovite, etc.: those produced in the contact zone between magmatic rock and limestone coexist with calcite, magnetite, epidote, etc., and are the product of desiliconization of magmatic rocks. It belongs to the trigonal crystal system and is often in a perfect hexagonal column or barrel. Oblique stripes or horizontal stripes often develop on the column surface, and triangular cracks can sometimes be seen on the bottom surface; the aggregate is granular.
As a kind of abrasive, brown corundum is widely used in abrasives and grinding tools. There are many types of corundum, and the uses of different types of corundum are also different. Brown corundum manufacturers, brown corundum, electric brown corundum, are crushed by crushing equipment, magnetic separation, iron removal, and screening into various specifications. It has a dense texture and high hardness. Electric fused brown corundum has high temperature resistance, high oxidation resistance, erosion resistance, and wear resistance. It has the characteristics of high purity, good crystallization, strong fluidity, low linear expansion coefficient, and corrosion resistance.
