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Refractory materials Bauxite for casting
Bauxite (aluminous soil; bauxite), also known as bauxite or bauxite, is an earthy mineral whose main component is alumina, which is hydrated aluminum oxide containing impurities. White or off-white, brownish yellow or light red due to iron content. Density 3.9~4g/cm3, hardness 1~3, opaque, brittle. Extremely difficult to melt. Insoluble in water, can dissolve in sulfuric acid, sodium hydroxide solution. Mainly used in aluminum refining, refractory materials.
Refractory materials Bauxite for casting
Bauxite Introduction.
Bauxite (aluminous soil; bauxite), also known as bauxite or bauxite, is an earthy mineral whose main component is alumina, which is hydrated aluminum oxide containing impurities. White or off-white, brownish yellow or light red due to iron content. Density 3.9~4g/cm3, hardness 1~3, opaque, brittle. Extremely difficult to melt. Insoluble in water, can dissolve in sulfuric acid, sodium hydroxide solution. Mainly used in aluminum refining, refractory materials.
Bauxite in the refractory industry usually refers to bauxite with Al2O3>=48% and low Fe2O3 after calcination, and high bauxite clinker is calcined bauxite ore. The clinker is grayish light yellow and dark gray, it is mainly used for high alumina refractories, and also used to make electric fused brown corundum.
Criteria for classifying bauxite into grades.
High alumina bauxite clinker is graded according to the content of AL2O3 and impurities such as Fe2O3, TiO2, Ca O+ Mg O, K2O+ Na2O and clinker bulk density and water absorption.
Types and grades of bauxite.
(1) Raw bauxite, i.e. bauxite raw ore (natural sedimentary rock type).
(2) Cooked bauxite, the raw bauxite is called cooked bauxite after calcination at high temperature (1200~1700℃).
Bauxite uses
(1) Aluminum refining industry. Used in national defense, aviation, automobile, electrical appliances, chemical industry, daily necessities, etc.
(2) Precision casting. Bauxite clinker is processed into fine powder and made into casting mold and then precision casting. Used in military, aerospace, communication, instrumentation, machinery and medical equipment sectors.
(3) Used in refractory products. High alumina bauxite clinker refractoriness up to 1780℃, strong chemical stability and good physical properties.
(4) Aluminosilicate refractory fiber. With the advantages of light weight, high temperature resistance, good thermal stability, low thermal conductivity, small heat capacity and resistance to mechanical shock. It is used in various industries such as iron and steel, non-ferrous metallurgy, electronics, petroleum, chemical industry, astronautics, atomic energy and national defense. It is high alumina clinker into the melting temperature of about 2000 ~ 2200 ℃ high temperature electric arc furnace, by high temperature melting, high pressure high-speed air or steam blowing, cooling, it becomes a white "cotton" - aluminosilicate refractory fiber. It can be pressed into fiber blankets, plates or woven into cloth instead of smelting, chemical, glass and other industrial high-temperature furnace lining refractory bricks. Firefighters can use refractory fiber cloth made of clothing.
(5) magnesia sand and bauxite clinker as raw material, add appropriate binding agent, used for pouring Sheng steel barrel overall barrel lining effect is very good.
(6) Manufacture of bauxite cement, abrasive materials, ceramic industry and chemical industry can make various compounds of aluminum
Common specifications of bauxite: 0-3mm 3-5mm 5-8mm 8-10mm 100 mesh 200 mesh, etc., can be adjusted according to customers' requirements.
Bauxite packing: 25kg/bag, double woven bag, also available in ton bag, can be adjusted according to customers' requirements.
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Henan YUANDONGLI Refractory Technology Co., Ltd.
Service Hotline：+86-371-8580-0003
Address: No. 9, Rengou Group, Magou Village, Laiji Town, Xinmi City, Zhengzhou City, Henan Province, China