Bauxite is an important mineral resource, the main component is alumina, usually contains a certain amount of iron oxide, calcium oxide, magnesium oxide and other impurities. After mining, bauxite ore is calcined at high temperature, which has higher physical properties and chemical stability and becomes calcined bauxite. After high temperature, the content of alumina is increased to make it more suitable for different application fields.
The bauxite production process includes mining and processing two stages. In the mining stage, bauxite ore is mined, and the initial crushing and screening.
During the processing stage, bauxite is subjected to a series of physical and chemical treatments to remove impurities.
The process of producing calcined bauxite includes two stages: preheating and calcination.
In the preheating stage, bauxite is heated to a certain temperature to remove its moisture and volatiles. The common preheating temperature ranges from 100 ° C to 300 ° C, and the preheating time usually does not exceed 1 hour. It can be operated by using a heating furnace or an oven.
In the calcination stage, the physical properties of bauxite will change obviously and transform into solid matter after calcination, which is suitable for the production of aluminum, ceramics, glass and other products. Bauxite is usually calcined at temperatures between 1000 ° C and 1500 ° C, depending on the type and chemical composition of the bauxite.It's a very stable refractory material.
It should be noted that too high or too low calcination temperature will lead to bauxite quality instability. Therefore, it is necessary to select appropriate calcination temperature in the production process to ensure the quality and performance of bauxite.
Bauxite is a natural mineral, the main component is alumina. It usually presents gray, white, yellow and so on color, has the high activity, may use in the manufacture Refractory, the electrolytic aluminum foil and so on product.
Calcined bauxite is a kind of bauxite that has been heated. During the process of calcination, the impurities in bauxite will be removed, and the crystal structure of bauxite will also change, making it a certain degree of fire resistance and stability. Calcined bauxite is usually used to make high-purity alumina, aluminum salts and other products, but also can be used to make advanced fireproofing materials.
The chemical and physical properties of calcined bauxite are as follows:
Different particle sizes are divided into: calcined bauxite aggregate and calcined bauxite powder calcined bauxite aggregate size: 0-1mm, 1-3mm, 3-5mm, 0-5mm, 0-8mm, calcined bauxite powder particle size: 80 mesh, 120 mesh, 200 mesh, 325 mesh
Chemical indicators:
The main chemical indexes of calcined bauxite include the content of Al2O3, SIO2, FE2O3 and Cao. These parameters determine the physical and chemical property properties of calcined bauxite and are important indicators for evaluating the quality of calcined bauxite.
Physical indicators:
The logistics indexes of calcined bauxite include bulk density, ash content, volatile content and so on. These indexes determine the combustion characteristics of calcined bauxite and are also important indexes to evaluate the quality of calcined bauxite.
1, bauxite can be used in aluminum industry: aluminum industry for national defense, aviation, automobiles, electrical appliances, chemicals, daily necessities, bauxite is the main use.
2. Bauxite is a good raw material for production of metallic aluminum, and it is also a main application field. Its usage accounts for more than 90% of the total bauxite output in the world. Non-metallic uses are mainly used as raw materials for Refractory, abrasives, chemicals and high-alumina cement.
3.Bauxite is chemically treated to produce Aluminum hydroxide, which is a good filler material. It is mainly used in cables and wires, polyvinyl chloride and ethylene-propylene-diene monomers to improve the fire resistance of these products, improve machining and electrical properties.
4.Bauxite is commonly used in the production of aluminium-containing compounds such as aluminium sulfate, Aluminum hydroxide, aluminium oxide and potassium sulfate.
5, low silicon high iron bauxite is often used to produce high aluminum cement, also known as aluminum sulfate cement. This kind of cement has the characteristics of strong fire resistance, quick setting and corrosion resistance.
6. Aluminum silicate refractory fiber has the advantages of light weight, high temperature resistance, good thermal stability, low thermal conductivity, small heat capacity and resistance to mechanical vibration, can be used in steel, non-ferrous metallurgy, electronics, Petroleum, chemical, aerospace, Atomic Energy, national defense and other industries.
7.Bauxite is also used to prepare mixtures of friction materials used in the production of brakes and clutch linings. Bauxite is also used in petroleum industry as adsorbent, electrode coating, copper coating, solvent, smelting solvent and anti-slip, corrosion-resistant paving materials.
Bauxite is mainly used as an additive for smelting mineral slag in steel industry. It can be used for mortar preparation in fluidized bed boiler, coke oven and cement production. The addition can improve the desulphurization ability and low carbon conversion rate of the slag, and reduce the slag precipitation, environmental pressure and transportation cost.
Gongyi Yuying Refractory Co. , Ltd. is a professional manufacturer and distributor in bauxite. The company produces a complete range of bauxite, complete specifications, to meet the needs of all walks of life.
Welcome to contact us：yuyingamy@outlook.com , Whatsapp/Wechat:+008613215996925
IPv6 network supported
español
العربية
