Refractory Calcined Rotary Kiln Bauxite of CNBM in China

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1.Structure of Calcined Bauxite Description

Bauxite (aluminous soil; Bauxite) is also called the alumina or bauxite, main ingredients are alumina, hydrated alumina containing impurities, is an earthy mineral. White or gray, brown and yellow or light red by iron.  From 4 to 3.9 g/cm3 density, hardness, 1 ~ 3 is not transparent, very brittle.  Very difficult to melt.  Insoluble in water,  soluble in sulfuric acid, sodium hydroxide solution. Mainly used for aluminium, refractory material. 

 

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

 

2.precision casting

 

3 refractory materials

 

4.aluminum silicate refractory fiber for fiber blanket, refractory brick .

 

5. refractory cement 

 

Bauxite is an aluminium ore and is the main source of aluminium. 

 

Bauxite is used in cement, chemicals, face makeup, soda cans, dishwashers, siding for houses.

 

4. Calcined Bauxite Images

 

Refractory Calcined Rotary Kiln Bauxite of CNBM in China

Refractory Calcined Rotary Kiln Bauxite of CNBM in China

 

 

5. Calcined Bauxite Specification

  Calcined Bauxite Introduction 

Property

Specifications

Name

aluminous soil  bauxite

Color

White, offwhite, auburnish yellow or light red (with Fe)

Bulk Density

2.55~3.6 g/cm3

Hardness

1~3

Main usages

1. Aluminium metallurgy 2.Refractory

 

Calcined Bauxite Specifications

Classifications

     Chemical Component %

Refractoriness

 Bulk Demsity

Al2O3 

CaO

Fe2O3 

    °C

    g/cm3

 Superfine

>85

<0.6

<1.4

  >1790

  >3.6

  Level 1

>80

<0.6

<3.0

  >1790

  >3.0

  Level 2A

70~80

<0.8

<3.0

  >1790

  >2.8

  Level 2B

60~70

<0.8

<3.0

  >1770

  >2.65

  Level 3

50~60

<0.8

<2.5

  >1770

  >2.55

 

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:How long is the fire endurance of the rock wool board?
When the average temperature reaches 140 degrees Celsius or 180 degrees Celsius, it starts to lose the fire insulation function.
Q:Is there vermiculite in refractory?
Vermiculite is usually used as lightweight material in refractory field, and its volume density is about 0.5.
Q:what's the materials of fireproof housing?
there are mainly several fireproofing levels, it is divided into flame retardant and non-combustible! at present t the main fireproofing materials on the market are made from rock wool board! it is incombustible material, of course, the price is relatively high. Other common materials are fire retardant foam.
Q:How to distinguish between class A fire resistant door and class B fire resistant door from appearance ? What are the differences between the two refractories? Thank you !
From the perspective of appearances, grade A is 70mm, B 50mm. Their materials are the same .
Q:which kind of fire bulkhead is better?
General business fire endurance of two products are 3 hours. Organic fire bulkhead's main ingredient is organic material, which can be used in anti-corrosion and fireproofing cable tray. Inorganic fire bulkhead's main ingredient is inorganic material, which mianly play a role of fireproofing. It's main ingredient is inorganic material, so it can't be used in acidproof and alkali resistant projects. Of course, the price of same amount organic fire bulkhead in general is more expensive than the inorganic fire bulkhead.
Q:What's the material of electrical fire prevention board?
Industrial electrical fire prevention board is mainly aimed at fire protection and thermal insulation. Iron plate is electrically conductive with good thermal conductivity, which will cause the result that the equipment is not insulated and suffers larger superheating surface! ! ! !
Q:What characteristics do A grade external wall fireproofing material have?
1. Save space and reduce costs; 2. Fireproofing, green and environmental protection; 3. Waterproofing; 4. Sound insulation; 5. Thermal insulation; 6. Install easily and shorten the construction period; 7. High safety performance.
Q:Do you know what the main indicators are for the inspection of refractory materials? Thank you very much for your requests and reports
Porosity, volume density, water absorption, true density, thermal expansion, thermal conductivity and heat capacity.
Q:What are unshaped fire-resisitance materials?
Refractory castable, refractory plastic material, usually classified according to construction and manufacture method, unfired bricks precast block, refractory pressed into material, refractory cast material, refractory coating, refractory ramming material there are many classification methods
Q:What's the difference of fire-resistant material's density, specific gravity and bulk specific gravity?
It usually used to test lightweight refractory. Density can be divided into apparent density (usually called as density) and true density: apparent density includes blow hole inside the sample; Unit weight is using quality to divide volume of sample and specific weight is used to represent liquid.

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