90% Round Kiln Calcined Bauxite For Alumina Industry

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0 m.t.
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25000 m.t./month

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Product Description:

1.Sepcification ,

AL2O3           90%min

Fe2O3           1.5%max

SiO2             4%max

TiO2             4%max

CaO+MgO  0.4%max

R2O            0.20%max

Moisture Absorption 3% max

Bulk Density  3.4g/cm3 min

2.Size200mesh,325mesh,100mesh,0-1mm,1-3mm,3-5mm and 5-8mm

3.Description

Bauxite is earthy mineral which consists mainly of Al2O3 , a kind of hydrated alumina containing impurities. According to the usage, It can be divided into the levels of Metallurgy, chemical industry, grinding, cement, and refractory. Clinker is pale yellow and dark grey. It is mainly used for high aluminum refractory material, and also can be used to make the fused corundum. Our materials of calcined bauxite is mainly D-K Style Bauxite Ore.

4.Specification,

   Item

 AL2O3

 FE2O3

  TIO2

K2O+Na2O

CaO+MgO

Bulk density

Moisture Absorption

  AL70

  ≥  70

  ≤3.0

   ≤4.0

       ≤0.6

     ≤0.6

    ≥2.7

               ≤5

  AL75

  ≥75

  ≤2.5

  ≤4.0

       ≤0.5

    ≤0.5

    ≥2.8

               ≤5

 AL80

  ≥80

  ≤2.5

  ≤4.0

       ≤0.3

    ≤0.5

    ≥2.9

               ≤5

 AL85

  ≥85

  ≤2

  ≤4.0

       ≤0.3

    ≤0.5

    ≥3.0

               ≤4

 AL86

  ≥86

  ≤2

 ≤4.0

       ≤0.3

    ≤0.5

    ≥3.1

               ≤4

 AL87

  ≥87

  ≤2

 ≤4.0

       ≤0.3

    ≤0.5

   ≥3.2

               ≤4

 AL88

 ≥88

  ≤1.8

 ≤4.0

       ≤0.25

    ≤0.5

   ≥3.25

               ≤4

 AL90

 ≥90

  ≤1.5

 ≤4.0

      ≤0.25

    ≤0.5

   ≥3.4

               ≤3

90% Round Kiln Calcined Bauxite For Alumina Industry

5.Material

Our material is from Yangquan, Shanxi,China. Yangguan bauxite ore have the best plasticity and adhesion. It can improve their product life.

Furnace and fuel,We have 6 shaft furnaces and use the gas for fuel. It can increase the temperature to fully burn, improve the bulk density and reduce impurities. In addition, using the gas can reduce the energy consumption, less CO2 emission for improvement of the work environment.


 Annual supply, 60,000mt of calcined bauxite per year

90% Round Kiln Calcined Bauxite For Alumina Industry

 

Inspection standard,

GB/T17617-1998----Sampling of raw materials and unshaped products

GB/T 2999-2002----Determination of bulk density of granular materials

GB/T 6900-2006----Chemical analysis of alumina-silica refractories

GB-325782---- Methods for chemical analysis of bauxite

SN/T 0481.1~0481.6—1995----Methods for inspection of bauxite for export

YB/T5180-1993----High-lumina bauxite and hard clay impurities inspection methods

GB/T 15545-1995----Unshaped refractory--Packing, marking, transportation  and  storage

Application,

1, Aluminium metallurgy

2, Precision casting/Investment casting,

    bauxite grog fines can be made into mold for precision casting.

3, Refractory, High alumina bauxite's refractoryiness can reach 1780oC. It is charactered by good       chemical stability and mechanical performance.

4, Aluminium silicate refractory fiber, The high alumina bauxite grog can melt under 2000oC to 2200oC in the electric arc furnace.After a series of processing, it can become aluminium silicate refractory fiber, which can be made into fiber blanket, cloth, plate and so on

5, Mixing magnesia and bauxite grog with binders to pour the molten steel ladle for better overall lining performance.

6,Producing bauxite cement

7,Abrasives

8, Ceramics industry

9, Chemistry industry for all kinds of aluminium compound.


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Q:Which one is better, fire-resistant wood or steel?
According to my understanding. This fire-resisting wood is better. Iron birch. The iron birch is three times harder than the oak, twice as hard than ordinary steel. It is the world's hardest wood which is used as a substitute for metal. The Soviet Union have used iron birch for the manufacturing of roller ball, bearings and it is applied in yachts. Iron birch has some wonderful characteristics. Since it has very dense texture, once put in the water it will sink; even if it is soaked in the water for a long time, the inside still remains dry. The iron birch is twice harder than the steel, it doesn't mean that its hrc value is twice of that of the steel. HRC means test load 1471.1N (150KG-F) using a diamond cone head with the point angle of 120 degrees to press. The calculation formula HR= (K-H) /C,K=0.2MM,H is the depth of indentation after releasing the major load. C= 0.002MM, so HRC100 is a limit value, then H is 0, which means that even the diamond will not drill into it. Generally the hardness of bearing steel is about HRC60. Iron birch is the championship among trees in terms of hardness. The bullet hit the wood is like hitting on a thick steel plate and the wood will be motionless. So, it is known as a tree harder than steel. I hope my answer will be helpful to you.
Q:How to divide fire rating of decorating materials ?
level A: incombustible, B1: Flame retardant, Level B2: combustible, Level B3: Flammable.
Q:How to classify the grade of wall fireproof and thermal inuslation matertial?
External wall thermal insulation materials are mainly divided into grade A, grade B1, grade B2 and grade B3. In accordance with the current "Combustion Performance Classification Method of Building Materials", grade A thermal insulation material is incombustible material and belongs to inorganic heat preservation material. However, grade A thermal insulation material is few in terms of the current market. There are only JETCO YT inorganic active wall thermal insulation material, glass wool, rock wool board, foam glass, vitrified micro bead and grade A fireproofing thermal insulation board. However, compared with grade A thermal insulation material, the more welcomed by the market is the organic insulation materials. Thermal insulation material that is determined as grade B is divided into three levels. Grade B1 is grade is flame retardant. Grade B2 is combustible. Grade B3 is flammable.
Q:How is the fire endurance of the fireproof paint?
This is not specified. It depends on design requirements.The products we made have fireproof endurance ranging from 1 to 4 hours. we have not done any higher.
Q:Which region use more refractory?
Gongyi of Henan province use more refractories
Q:Can anyone tell me the requirements of the refractory masonry??
Refractory materials actually have two functions. The first one is to improve the refractoriness and the second one is to improve the body plasticity of refractory materials.The higher the aluminum content is, the better refractory it will be. Of course, the content of aluminum in refractory materials can not be impoved only by using kaolin. Such raw materials that contain more aluminum as bauxite chamotte should be used as framework.So the content of aluminum in kaolin does not need to be too high and more than 38% of aluminum is enough. However, the viscosity should be taken into account. It will be better if the viscosity is better as the extra bentonite do not need to be added.The refractoriness that is is above 1400 degree is enough.
Q:How to calculate the thickness of choosing refractory? Such as steel ladle should choose what kind of refractory and using what thicknes?
The relative production is lower and material cost is higher, the lining of the refractory is thicker: 1, determine the weight of the refractory material according to the main structure of the bearing capacity, to prevent damage to equipment, fire-proof material damage after the surplus size and thickness of the thermal conductivity of refractory materials, the smaller the effective volume, production output, the cost of materials) to consider the selection of refractory material thickness. 3 from the point of usage (usage cycle, relative usage cycle is longer, because under the condition of invariable in the device's overall dimensions of the refractory lining thickness to determine several basic principles, according to the volume of the weight computation of refractories and refractory thickness, these items must be fully consider the pros and cons before decided. 2 according to maximum temperature that shell can withstand.
Q:Which kind of furnace hearth refractory is better?
hearth selected material] hearth material must be durable, high temperature resistant, general selecting masnory made of refractory cement, silicon carbide refractory products, mullite or multicrystal mullite (which is the general term of minerals composed of a series of aluminum silicate, mullite is only stable binary compound in the Al2O3-SiO2 system) etc.. [hearth] is a three-dimensional space surrounded by furnace walls for combustion of the fuel. The funtion of hearth is to ensure the fuel to burn as far as possible, and to cool the gas temperature of the hearth exit to the allowed temperature of convection heating surface safe operation . Therefore, the hearth should have sufficient space and adequate heating surface. In addition, there should be reasonable shape and size in order to fit the burner and the organize aerodynamic field inside the furnace to prevent the flame from adherence, dashing walls and have high fullness and eve wall thermal load.
Q:How to hang the suspended brick in the refractory masonry?
First you can weld the metal fastener of the suspended brick and then hang up the brick.
Q:What are the requirements of refractory temperature of refractory brick?
Refractoriness can reach 1690 degree, but the highest operating temperature is 1350 degree. If the temperature goes higher, operation life will be greatly shortened.

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