76% Rotary/ Shaft/ Round Kiln Alumina Calcined Bauxite Raw Material for Refractory

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Tianjin
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TT or LC
Min Order Qty:
25 m.t.
Supply Capability:
3000 m.t./month

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Product Description:

76% Rotary/ Shaft/ Round Kiln Alumina Calcined Bauxite Raw Material for Refractory

Introduction

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%to88%.the heating is carried out in rotary kilns

1.Applications

Raw bauxite is typically classified according to its intended commercial application,such as abrasive ,cement ,chemical, metallurgical, and refractory .as raw material for use in high alumina and super duty refractory bricks and shapes ,plastics ,castable refractory, motors, gun mixes, ramming mixes, abrasive grains and other products.

2.specifications

Item

Al2O3

Fe2O3

TiO2

K2O+Na2O

CaO+MgO

Bulk density

GAL65

≥65

≤2.5

≤4.0

≤0.3

≤0.5

≥2.6

GAL75

≥75

≤2.5

≤4.0

≤0.3

≤0.5

≥2.7

GAL80

≥80

≤2.5

≤4.0

≤0.3

≤0.5

≥2.8

GAL85

≥85

≤2

≤4.0

≤0.3

≤0.5

≥3.0

GAL86

≥86

≤2

≤4.0

≤0.3

≤0.5

≥3.1

GAL87

≥87

≤2

≤4.0

≤0.3

≤0.5

≥3.2

GAL88

≥88

≤1.8

≤4.0

≤0.25

≤0.5

≥3.25

GAL90

≥90

≤1.8

≤4.0

≤0.25

≤0.5

≥3.25

 

Calcined Bauxite Grade:

1.Refractory Grade:

Refractory grade bauxite has high refractoriness, good mechanical strength and moderate slag resistance. Bauxite in the refractory industry is typically used in ladle working lining, tundish furniture, delta sections, general perpose repairment, aluminium melting furnace and mineral processing.  

3. Rotary calcined bauxite:

 Rotary Kiln Bauxite, as the name suggests, it is the bauxite produced by rotary kiln. there are three kinds of kilns for bauxite production mainly, rotary kiln, shaft kiln and round kiln.

4. Shaft kiln calcined bauxite:

Shaft kiln bauxite, the bauxite calcined by shaft kiln. the raw material-bauxite ore is loaded from the top of kiln together with coal powder and combustion improver,the fire of calcination comes from kiln bottom, about 1300-1400 After the complete calcination, the bauxite is carried out from the bottom. 

 

Packaging & Delivery

Packaging Details: In bulk or in 1-1.25mr bag

 

Product Pictures:

 

76% Rotary/ Shaft/ Round Kiln Alumina Calcined Bauxite Raw Material for Refractory

76% Rotary/ Shaft/ Round Kiln Alumina Calcined Bauxite Raw Material for Refractory

76% Rotary/ Shaft/ Round Kiln Alumina Calcined Bauxite Raw Material for Refractory

76% Rotary/ Shaft/ Round Kiln Alumina Calcined Bauxite Raw Material for Refractory


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Q:What are the specifications of refractory kilns ?
Rotating equipment is widely used in mechanical, physical or chemical treatment of solid materials in building materials, metallurgy, chemical and environmental protection industry. Such equipment is called rotary kiln. The best materials are magnesia-chrome bricks, unfired magnesite-chrome bricks, silmo bricks, magnesia-alumina spinel bricks, magnesia calcium zirconate bricks, iron magnesia bricks and castables.
Q:What's the organzational structure of refractory material?
Although hacing same chemical composition refractory material products also is mineral organizer. There are differences in the type of mineral phase, high refractoriness under load, quantity and crystalline state. The organizing minerals and microstructure are reflected by folding strength, high temperature pit definite density torsional strength, high-temperature torsional strength and product property. But, for example, wear or crack may cause damage. The performance index can reflect the internal structure of refractory: the nature of the thermal performance---linear expansion coeffcient. And the mineral composition of refractory material depends on the chemical composition and process conditions, the heat capacity and temperature conductivity. If the processing conditions are different, the influence of chemical action, and thermal conductivity: represents the nature of the mechanical properties - normal temperature, high temperature compression strength, high temperature creep performance and elastic modulus. Chemical compositions are the basic characteristics of refractory, representing the nature of the density---porosity, corrosion occurred refractory materials in high temperature use As a result, the composition and quantity directly determines the performance of refractory, true density: representing the forming of high temperature performance --- refractoriness, high temperature volume stability, so you can't analyze the effect on the product performance just from chemical composition. The performance of various refractory materials are different. It must be emphasized that macroscopic organization structure of refractory material is also an important factor that affects performance; reflecting complexity of penetration---air permeability, thermal shock resistance and slag resistance. The main component is the foundation of refractory characteristics.
Q:Who can tell me what is neutral refractory?
Refractories mainly refer to aluminum oxide, chromium oxide and carbon as the main component of refractory materials, such as corundum brick, high alumina brick, and carbon brick. Its characteristic goes to the resistance to both acidic and basic slag. Basic refractories mainly refer to the refractory materials whose mian components are magnesium oxide and calcium oxide, including magnesia bricks, magnesia-alumina bricks, magnesia chrome bricks, dolomite bricks, etc. Basic refractory is good at resisting basic slag erosion.
Q:Does anyone know what is the use of waste refractory materials?
1.Waste refractory bricks can be reused to make the refractory bricks after being crushed by crusher, but the price is not very high. The purchasing price of refractory plant is ¥60/ton. Because the refractory material has been calcinated for two times, it becomes easier to make bricks expansion coefficient with waste refractory bricks, but too much is inadvisable. If too much, the refractory materials would have a bad combination, which will give rise to loose bricks and incomplete corners. Nowadays, ordinary refractory plants would purchase waste refractory bricks to produce bricks, but better plants wouldn’t do this.
Q:What dose the fireproof and thermal insulation material include?
Protective cloth, fireproof cloth, plastic coated cloth, PVC tarpaulin, flame retardant cloth, duct cloth, automobile tarpaulin, PVC protective cloth, the freight yard covered cloth, PVC plastic coated cloth, Industrial Canvas, widely used in automobile tarpaulin, trains covered cloth, ships covered cloth, open-air yard covered cloth, industrial and agricultural covered cloth ; used in glass, timber, fertilizer plants, steel plants, mechanical hardware factories, feed mills, grain storages, container plants, oil refineries plants, packaging plants, paper plants, air conditioning plants, logistics, ore factories, fleet, rail and sea fields, etc.
Q:What are the meanings of azs, 34% and ec in fused brick?
The fused brick, also called zircon corundum brick, is shorted as AZS for three chemical components in Al2O3-ZrO2-SiO2 ternary diagram. I don't know the meaning of EC.
Q:What's the type of fire proofing thermal insulation materials?
Hello! Fire proofing thermal insulation material can be classified as inorganic thermal insulation material and composite thermal insulation material. According to the form, it can be divided into fibrous veneer, mineral wool, rock wool, glass wool, aluminum silicate cotton, ceramic fiber, microporous diatomite, calcium silicate, expanded perlite, expanded vermiculite, aerated concrete, bubble foam glass, ash, glass, clay, foam concrete, and pasted paste powder polystyrene particles insulation pulp, etc. They are characterized by flame retardancy and fire proofing and thus can be used in buildings with high fire proofing class. Among them, calcium silicate, aluminum silicate and asbestos can also be used for the thermal insulation for heat supply pipelines.
Q:How long is the fire resistance time of the AAAfire resistance rolling shutter door?
How long is the fire resistance time of the AAA fire resistance rolling shutter door?
Q:What are the requirements of refractory temperature of refractory brick?
Refractory brick, called refractory brick for short, is refractory material made by firing refractory clay or other refractory raw materials. Faint yellow or brownish, it is mainly used in building smelting furnace. It can resist 1,580 ℃ -1,770 ℃ high temperature.
Q:How to distinguish the construction fire-proof material rating?
Currently the national standards divide building materials as follows: A1, A2, B, C, D, E, F. External wall thermal insulation fire rating can be basically divided into: A1, A2, B1, B2, B3 and other levels. Class A is non-combustible, class B1 flame retardant, class B2 combustible, class B3 flammable. Combustion performance grades of building materials and products are divided into class A1, A2, B, C, D, E, F. And grading of flooring materials and pipeline thermal insulation materials is also stipulated separately, whose combustion performance grade is distinguished by the subscript fl and L respectively. ie. Combustion performance grades for ordinary building materials and products are A1, A2, B, C, D, E, F; combustion performance grades for paving material are Alfl, A2fl, Bfl, Cfl, Dfl, Efl, Ffl; combustion performance grades for pipeline thermal insulation material are A1L, A2L, BL, CL, DL, EL, FL.

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