Refractory Grade Calcined Bauxite 85PCT Grains

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Tianjin
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25 m.t.
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12000 m.t./month

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Product Description:

Refractory Grade Calcined Bauxite 85PCT Grains


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

Refractory Grade Calcined Bauxite powder .

 

Calcined Bauxite Applications

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 refractoriness can reach 1780°C.

    It is charactered by good chemical stability and mechanical performance. (Al2O3 ≥48% with low Fe2O3)

4. Aluminium silicate refractory fiber: The high alumina bauxite grog can melt under 2000°C-2200°C     in the electric arc furnace.After a series of processing, it can become aluminium silicate refractory fiber, 

which can be made into fiber blanket, plate,cloth.

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

    performance.


Usage 
(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. 


Pictures:

Refractory Grade Calcined Bauxite 85PCT GrainsRefractory Grade Calcined Bauxite 85PCT Grains

Refractory Grade Calcined Bauxite 85PCT GrainsRefractory Grade Calcined Bauxite 85PCT Grains



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Q:what is the grading standards of external wall thermal insulation materials?
1. combustion performance of insulation material rates A EPS sea capacity module, rock wool, glass wool, foam glass, ceramic foam, foam cement, perlite obturator, etc. 2. combustion performance of insulation materials rates B1 Extruded polystyrene board (XPS) after special treatment / Special treatment of polyurethane (PU), phenolic aldehyde, gelatine powder polyphenyl granule3 combustion performance of insulation material rates B2 Molded polystyrene board (EPS), extruded polystyrene board (XPS), polyurethane (PU), polyethylene (PE), etc. See the 2009 edition construction technical measures 4.3.6 A graded insulation material is fire proof, but its thermal insulation performance is not so as organic XPS \ EPS. I feel the best insulation materials are Hairong EPS module. it is both insulating and fireproof and cheap. Insulation materials in the domestic market each has its shortcomings. Choose of materials should based on actualities in construction.
Q:How to divide fire rating of decorating materials ?
Generally speaking, it is divided into Level A: noninflammability; B1: difficult-flammability; B2: combustibility; B3: inflammability.
Q:How long is the duration of fire resistance that fireproof window of level B can endure?
The duration of fire resistance: fireproof window of level A shall not be less than 1.5h, while level B shall not be less than 1.0h. The frame of both fire proof windows A and B are made of steel, and the glass, not less than 26mm, is composite insulation fireproof glass. Monolithic fireproof glass window is neither B fire proof window nor A fire proof window, but non insulated fire proof window.
Q:What materials is silicious thermal insulation board made of?
Siliceous insulating panels use quartz sand as the main material and are composited with fiber. Of course the amount of insulation board materials used by different companies is different. In terms of Hua Heng, siliceous insulating boards can be divided into insulating panels for casting slabs and insulation board for intermediate tank according to the usage. The latter one can be divided into liner plate (wallboard, side panels, baseboard) and impingement plate based on parts it is used on. Siliceous insulating panels use quartz sand as the main material and are composited with fiber. Method for manufacturing a silicon insulating panel is divided into semi-dry method and wet method. It is used for casting ingot insulation cap of the killed steel and continuous casting tundish.
Q:Who knows about the fire endurance of sintered shaly hollow bricks?
1. after roasting at high temperature of more than 1200 degrees, shale burned bricks in construction works can be free from expanding with heat and contracting with cold. 2. masonry walls can be plastered with no needs of any anti-cracking, reinforcement measures, and walls will not bulge and crack, which can reduce the construction cost, as well as are preferred building materials of frame structural engineering. 3.They have good sound insulation and thermal insulation performances, are one of the green building materials that the state currently promotes. 4. They have high intensity. The average compressive strength of them is up to 15.8, which matches with M7.5 cement mortar that has advantages of low water absorption, and good anti efflorescence performance.
Q:What kind of fireproof material is used for steel structure?
Brushing or spraying the coating on the surface of steel structure to prevent burning and insulate heat. It also prevents undermining the rolled steel from rapid temperature elevation and avoid collapse of building for lose of supporting capacities. Agglutination material are classified as fireproof coatings for steel structures which is solvent based and Water-based steel structure fire retardant coatings. Fireproof coatings for steel structures which is solvent based are subdivided into fireproof coatings for steel structures which is solvent based with low benzene content and fireproof coatings for steel structures which is solvent based with high benzene content (TVOC≤600g / L, benzene ≤5g / kg). It can be divided by thickness. ultra-thin (CB) fireproof coatings (coating thickness ≤3mm), thin (B) fireproof coatings (3mm & amp; lt; coating thickness ≤7mm) and thick (H) steel structure fire retardant coating (7 mm & amp; lt; coating thickness ≤45㎜). The coating can be divided into non-intumescent fire retardant coating and intumescent fire retardant coating according to the the expansion properties. Slim (CB) and fire-resistant coating for steel structure and thin(B) fireproof coatings is intumescent fire retardant coating, thick (H) fire-resistant coating for steel structure is intumescent fire retardant coating. Unprotected steel structure has fire endurance of 0.25 hours.
Q:What are the characteristics of phenolic resin as a refractory material?
Q:Why should graphitic refractory materials be used now that graphite can burn?
Materials for refractory must have the following characteristics and properties: 1, high stability: Anti-oxidation, anti-reduction, thermal decomposition; 2, high melting point : 2800℃; 3, low price. Graphite has all three characteristics and properties, especially melting point and stability.
Q:Introduction to refractory material
Refractory material refers to inorganic non-metallic materials with refractoriness of no less than 1580℃. Refractoriness refers to the centigrade temperature of refractory cone sample in the case of no load when resisting high temperature without softening. But the refractoriness alone cannot descript the refractory material, thus 1580℃ is not absolute. Now refractory material is defined as material used in high temperature allowed by its chemical properties. Refractory material is widely used in metallurgy, chemical industry, petroleum, machinery manufacturing, silicate and power industrial area, of which the application in metallurgy accounts for the largest part of 50% ~ 60% of total output.
Q:how about the performance of aluminum silicate fire proof thermal insulation?
aluminum silicate refractory fiber board has following characteristics:1. the structure is more even than natural wood. it avoids rot, moth-eaten and other problems, 2. fiber board has small expansion and contraction, which is easy to be processed. 3. its smooth surface is easy to paste a variety of finishings and you can make furniture more beautiful. Decorative wood-based panel is to embellish their homes. I hope it is useful to you!

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