$High Quality Bauxite High Alumina Refractory Brick Dry Pressed Block of CNBM in China System 1$
$High Quality Bauxite High Alumina Refractory Brick Dry Pressed Block of CNBM in China System 2$
$High Quality Bauxite High Alumina Refractory Brick Dry Pressed Block of CNBM in China System 3$
$High Quality Bauxite High Alumina Refractory Brick Dry Pressed Block of CNBM in China System 4$
$High Quality Bauxite High Alumina Refractory Brick Dry Pressed Block of CNBM in China System 5$
$High Quality Bauxite High Alumina Refractory Brick Dry Pressed Block of CNBM in China System 6$

$High Quality Bauxite High Alumina Refractory Brick Dry Pressed Block of CNBM in China$

$High Quality Bauxite High Alumina Refractory Brick Dry Pressed Block of CNBM in China System 1$

$High Quality Bauxite High Alumina Refractory Brick Dry Pressed Block of CNBM in China System 2$

$High Quality Bauxite High Alumina Refractory Brick Dry Pressed Block of CNBM in China System 3$

$High Quality Bauxite High Alumina Refractory Brick Dry Pressed Block of CNBM in China System 4$

$High Quality Bauxite High Alumina Refractory Brick Dry Pressed Block of CNBM in China System 5$

$High Quality Bauxite High Alumina Refractory Brick Dry Pressed Block of CNBM in China System 6$

High Quality Bauxite High Alumina Refractory Brick Dry Pressed Block of CNBM in China

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Loading Port:: Tianjin

Payment Terms:: TT or LC

Min Order Qty:: 11 m.t.

Supply Capability:: 10000000 m.t./month

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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. 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. Calcined Bauxite Images

$High Quality Bauxite High Alumina Refractory Brick Dry Pressed Block of CNBM in China$

5. Calcined Bauxite Specification

BRAND INDEX	High Alumina Brick for BF			Fire Clay Brick for BF
BRAND INDEX	GL-65	GL-55	GL-48	ZGN-42	GN-42
Al₂O₃, % ≥	65	55	48	42	42
Fe₂O₃, %, ≤	2.0	2.0	2.0	1.6	1.7
AP % ≤	19	19	18	15	16
Refractoriness °C ≥	1790	1770	1750	1750	1750
PLC %	0~-0.2	0~-0.2	0~-0.2	0~-0.2	0~-0.3
PLC %	1500°C x 2h		1450°C x 2h
CCS MPa ≥	58.8	58.8	49	58.8	49
0.2MPa RUL °C ≥	1500	1480	1450	1450	1430

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.

Q:How long is the duration of fire resistance of autoclaved flyash-lime bricks?: How long is the duration of fire resistance of autoclaved flyash-lime bricks?

Q:What needs to be noted when choosing and using blast furnace fireproof materials? Who knows?: there are different temperatures in various parts of the blast furnace, thus using different types of refractory.

Q:On the problem of making refractory materials: Refractories mainly depend on their high melting point characteristics. The refractory market is mainly Magnesium Oxide material.

Q:How to deiron refractory?: Our company uses magnetic separation method.

Q:what are the types of piping insulation material fire?rating?: according to China's national standard GB8624-97, the combustion performance of construction materials can be divided into several grades grade A: Incombustible building material: Almost no burning material. Class B1: nonflammable building material: nonflammable material has a good flame resistance effect. when it meet the open fire in the air or burnd at high temperature, it is difficult to spread quickly, and when the fire source is removed, the combustion stop immediately. Class B2: flammable building material: flammable material has a good flame resistance effect. when it meets open fire in the air or at high temperature, it will immediately burst into flames and easily cause fire spread, such as wooden column, timber roof truss, timber beam, and wooden stairs,ect.. Class B3: inflammable building material: No flame resisting effects, highly flammable, high fire risk. 2, external wall thermal insulation materials, in accordance with fire rating, can be divided into1) grade A combustion performance thermal insulation material: Rock wool, glass wool, foam glass, foamed ceramics, foam cement, hole-closed perlite ect.. 2) class B1 combustion performance insulation materials: Extruded polystyrene board (XPS) after special treatment / Special treatment of polyurethane (PU), phenolic aldehyde, gelatine powder polyphenyl granule, etc. 3) combustion performance of class B2 insulation material: molding polystyrene board(EPS), extruded polystyrene board (XPS), polyurethane (PU), polyethylene (PE), etc.

Q:The mechanism and function of antioxidants in carbon containing composite refractories are briefly described.: With the advantages of carbon refractories especially excellent slag resistance and high heat stability, but graphite under high temperature oxidation, in order to improve the oxidation resistance of carbon composite refractory materials, often adding a small amount of antioxidants, to improve the oxidation resistance of carbon composite refractories. Antioxidant additives commonly used in metal powder, silicon powder, magnesium powder, silicon carbide powder and so on.

Q:What's the B grade fireproofing material?: Grade B: rubber and plastic, extrusion molding, polyphenyl, PEF. organics, extruded sheet, polyphenyl board, phenolic resin. Hairong modules (thermal insulating and fireproof material) can reach grade B1 in fireproof performance.

Q:how long is the fire endurance of plasterboard?: Plasterboard is non-flammable B1 level products. There are introductions in Fireproof Specification of National Standard Building Interior Decoration Design. Plaster board mounted on steel stud can be used as A level decoration materials. In accordance with the national fire safety rules on fire durance of walls and ceilings and other components, we can not simply say whether a piece of gypsum board can meet the requirements. In GB "gypsum board" it clearly states: Fireproof plasterboard can endure fire longer than 20minutes. Wherein Dragon brand fire-resistant gypsum board can endure fire longer than 40 mintues. Gypsum board is comprised of dry wall, steel stud and various auxiliary materials. the fireproof performance of the gypsum board system is relevant to the type, quality , layers of the gypsum board, quality of keel and installations, whether the rock wool is filled and its unit weight, the treatment of seaming and some minor joints.

Q:Does anyone know which materials belong to light fire resistant material?: Building board of lightweight fireproof partition material: 1, GRC lightweight partition material glass fiber reinforced concrete; it is a kind of fiber cement composite with alkali-resistant glass fiber as reinforced material and cement mortar as the base material . Aerated concrete block equipment foundation construction Its outstanding features are having good tensile, rapture strength and good toughness. This kind of material is particularly suitable for the production of ornament mould and the manifestation of strong texture. Compared with these external wall decorative materials, the biggest advantage of GRC material is to meet the individual needs of architects, completing the expression of various ornament moulds and skin textures. 2, fiber reinforced low alkalinity cement building plate. The standards stipulate the classification, raw materials, technical requirements, test methods, inspection rules, packaging, labeling, transport and storage of the fiber reinforced low alkalinity cement building plate.

Q:Who knows the fire endurance of B-level fireproof doors and windows?: Rock wool board of B-grade fireproof doors keeps 46mm in thickness, doors that are generally used in relatively common fire fighting access, while A-grade fireproof doors are generally used in machine rooms, warehouses, oil depots and other important fire fighting access and flammable and combustible pulbic places. B-grade fireproof doors are more widely used than A-grade fireproof doors.

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