High Quality Rotary Kiln Bauxite of CNBM in China

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Product Description:

High Quality Rotary Kiln Bauxite of  CNBM in China

1.Structure of Calcined Bauxite Description

A general term for a rock composed of hydrated aluminum oxides. It is the main ore of alumina to make aluminum.

 Also used in the production of synthetic corundum and aluminous refractories. The bauxite is purified by the 

Bayer Process. First the ore is mixed with a hot concentrated solution of sodium hydroxide. The NaOH will dissolve 

the oxides of aluminum and silicon but not other impurities such as iron oxides, which remains insoluble. The 

insoluble materials are removed by filtration. 1:description:
calcined bauxite is one of the principal ore of aluminum. Calcined bauxite contains hydrous aluminum oxides and 

aluminum hydroxides, formed through the laterization of aluminous rocks in tropical and subtropical areas .

calcined bauxite is obtained by calcining (heating)superior grade bauxite at high temperature (from 85OC to 1600C) .this removes moisture thereby increasing the 

alumina content. compared to an alumina content of about 57%to 58%in raw bauxite, calcined bauxite has an alumina content of 84% to 88%.the heating is carried out in rotary kilns.

2.Main Features of the Calcined Bauxite

Calcined bauxite is one of the principal ore of aluminum. Calcined bauxite contains hydrous aluminum oxides and aluminum

hydroxides, formed through the laterization of aluminous rocks in tropical and subtropical areas .Calcined bauxite is obtained by calcining (heating)superior grade bauxite at high temperature (from 85OC to 1600C) .This removes moisture there. By increasing the alumina content,compared to an alumina content of about 57%to 58% in raw bauxite, calcined bauxite has an alumina content of 84%to88%.The heating is carried out in rotary kilns. 

3.Main usage of the Calcined Bauxite

(1) aluminium industry. Used in national defense, aerospace, automotive, electronics, chemical industry, daily necessities, etc. 
(2) precision casting. Alumina clinker made after the mould precision casting processed into fine powder. Used in military industry, aerospace, communications, instrumentation, machinery and medical equipment department. 
(3) is used for refractory products. High bauxite clinker refractoriness is as high as 1780, chemical stability strong, and good physical properties. 
(4) aluminum silicate refractory fiber. With light weight, high temperature resistance, good thermal stability, low thermal conductivity, heat capacity is small and the advantages of resistance to mechanical shock. Used in iron and steel, nonferrous metallurgy, electronics, petroleum, chemical, aerospace, atomic energy, defense and other industries. 
(5)  in magnesia and bauxite clinker as raw materials, add the appropriate binder, used for pouring ladle whole ladle lining has particularly good effects. 
(6)   manufacture alumina cement, abrasive materials, ceramic industry and chemical industry can be aluminum of various compound.


4. Calcined Bauxite Images


High Quality Rotary Kiln Bauxite of  CNBM in China

High Quality Rotary Kiln Bauxite of  CNBM in China

5. Calcined Bauxite Specification


AL2O3        85.00 % Min.

Fe2O3           2.75 % Max 

CaO+MgO    1.50 % Max

SiO2             6.00 - 7.00 %

TiO2             4.00 - 4.50 %

K2O              0.40 %

BD               3.15 gm/cc

SIZE            0 - 1 MM, 1 - 3 MM & 3 - 5 MM



6.FAQ of Calcined Bauxite

1). Q: Are you a factory or trading company?

A: We are a factory.

2). Q: Where is your factory located? How can I visit there?

A: Our factory is located in ShanXi, HeNan, China. You are warmly welcomed to visit us!

3). Q: How can I get some samples?

A: Please connect me for samples

4). Q: Can the price be cheaper?

A: Of course, you will be offered a good discount for big amount.




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Q:What defect does fused cast refractories have ?
The impact on the quality of glass is mainly the defects that eroded down refractory materials mixed in the glass, thus being prodeced of grass products. Defects are mainly foreign body defects such as sand, knot and wave reinforcement.
Q:What kind of material is good for cabinet fireproof board
Cabinet fireproof plate can be classified into fiber cement fireproof board, metal fire proof board, mineral wool fireproof board, perlite fireproof board, all sorts of fire prevention board. Fiber cement fireproof board is a kind of ornament plate using siliceous or calcareous as main materials and combined with a certain proportion of fibre material; metal fireproof board is a kind of decorative plate made of aluminum plate, stainless steel plate, color steel plate and other metal materials as the main raw material and added by certain flame retardant materials. Mineral wool fireproof board is a decorative plate made of mineral wool and glass wool; perlite fireproof board is hollow fire proof plate made of low alkalinity cement as the main raw material, and supplemented by certain perlite with fireproof function as filling. Fiber cement fireproof board is a kind of new material increasingly gets popular with superior heat insulation, sound insulation performance, belonging to the A1 level fire materials 1, Suzhou total surplus purification A-grade fireproof rock wool colored steel rock wool board range of applications: Partition ceiling material: Rock wool reference price: On a square 58.00/2 meters, Huarui thermal insulation fireproof materials aluminum silicate refractory aluminium silicate A-grade fireproof heat insulation aluminium silicate plate temperature: 1000 core material: Reference price for aluminum silicate fiber cotton: $3500.00\ ton
Q:Can anyone tell me what is the material of which the mould for refractory is made?
karat gold
Q:Are the specification of fireclay bricks and ordinary clay brick the same?
The standard size of refractory bricks in our country is: 230mm × 114mm × 65mm; ordinary brick: 240 ×115 ×53, building blocks: (it is divided into blind hole and via) 240×390×190, 240×190×190, 240×90×190, 190×190×190, 190×390×190, 190×190×190, 190×90×190, 140×390×190, 140×190×190, 990×200×400, 0×390×190, 90×190×190, 90×90×190. Another is interlocked hollow block : 90×200×400,90×200×245,90×200×200,90×200×100,90×200×290,150×200×275,150×200×200,150×200×100,150×200×290.
Q:What high-molecular polymers can be used as fire-resistant material binder?
Lignin is the least expensive.
Q:What are the commonly used admixture for alumina-magnesia refractory? What are the impacts on its performance?
2, form Mg-SiO2 coagulation and combination, CA cement bond? Bricks can generally be made by combing with phenolic resin, castable use 1, combined with silicon powder; 3, can also combined with brine MgCl is binding agent
Q:what's the requirements of refractory for forge furnace?
High temperature resistance, good slag resistance.
Q:What refractory material lead smelting furnace needs?
Q:What is fireproofing material? Are fireproof materials the same thing with thermal insulation materials and refractories?
Fireproofing material is inorganic board, while thermal insulation material belongs to organic board. Fireproof material can also preserve heat, but it is not as good as thermal insulation material in this aspect.
Q:What are grades of refractory materials?
Refractories have lots of varieties which all have different purposes. It is necessary to classify refractories scientifically in order to scientifically study, choose and manage them. Classification methods of refractories include chemical properties classification, chemical composition of mineral classification, manufacturing technique classification, morphology of the material classification. 1 divided according to the level of refractoriness: ordinary refractory materials: 1580 ℃ ~ 1770 ℃, advanced refractories: 1770 ℃ ~ 2000 ℃ and super refractories: above 2000 ℃ 2, divided in accordance with shapes and sizes : Standard ones: 230mm × 113mm × 65mm, no more than four ruler.

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