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

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Loading Port:
Tianjin
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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

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

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

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.

 

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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 refractories are accessible with ease in daily life?
Basically there have all materials. But it depends on your needs.
Q:For refractory, what is critical particle size? Thank you.
000000
Q:What is the material of fire resistant glass reinforced plastics grating?
What is the material of fire resistant glass reinforced plastics grating?
Q:Which brand of AAA refractory is good?
Foshan Nanhai Yanbu Shuying fire-resistant insulation material is very good, and it is a professional company of the production and sale of refractories. Our company specializes in the production of refractory bricks, refractory bricks, refractory castable, refractory aggregate, refractory materials, bauxite, alumina bricks and to undertake the production of various common refractory bricks and non-sizing bricks. The Zhengzhou Fire High Temperature Materials Co., Ltd. is also a good company. It is a collection of R & D and production company. The company mainly produces refractories, refractory bricks, refractory castable, refractory aggregate, refractory materials, special refractory bricks.
Q:What is the limit of fireproof rolling shutter?
According to the national standard 14102-2005 GB standard, the provisions of 14102-2005 GB specify that: According to provision 14102-2005 GB: If fire resistance limit of fire resisting shutter is no less than 3 hours, it is AAA fireproof rolling shutter. Therefore, the fire resistance limit of AAA grade fireproof rolling shutter should be 3 hours.
Q:The difference between refractory and thermal insulation material
In simple terms, refractoriness is different. The refractoriness of refractory is high while that of insulation material is low.
Q:Preparation of refractory clay
Is it to make refractories? Add some andalusite to the refractory mortar will improve the effect.
Q:What's the refractory material in common use currently?
(1) Alumina-silica refractory brick: Except the transition band, hot end and firing zone of the rotatory cement kiln, it can be applied to the whole burning system of the precalcining kiln, such as the fixed wall lining, wicket, cooling machine, tertiary air duct, burner, etc. It mainly includes alkali-resisting brick, high alumina (anti stripping) brick, silica-mullite brick, etc. (2) Basic refractory: For the upper transition band close to the part of burning zone and the burning zone, its inner lining can endure the highest flame temperature of 2000℃ and material temperature of 1350℃-1400℃, and it also has to withstand the permeation of sulfur and alkali compounds, permeation, thermal shock and oxidoreduction of hot-melt clinkers (liquid phase), mechanical stress of elliptic cylinder deformation, etc. Therefore, inner linings are the most demanding parts to withstand stress, and only basic refractory can meet with requirements under this working condition. (3) Fireclay insulating refractory: Its microstructure has notable characteristics of high porosity, large pore size and thermal insulation performance. For its low volume density and light weight, it is usually referred to as lightweight refractory. Fireclay insulating refractory product has great varieties, and it is usually classified and named according to its chemical and mineral compositions or production raw materials, and it is also classified according to its operating temperature and material form. Currently, the most used main thermal insulation material for the precalciner kiln system at home and abroad is calcium silicate board; besides, light weight castable and insulating fire brick are increasingly used year by year. Other thermal insulation materials are mainly ceramic fiber products.
Q:What are the fireproofing materials of the external wall included?
Facades a fireproof material comprises three anti-cloth, fireproof cloth, plastic cloth, PVC tarpaulins, flame retardant cloth, Hair Dryers cloth, automobile tarpaulin, PVC three anti-cloth, the freight yard covered cloth, PVC coated fabric, canvas industry etc., are widely used in automobile canopy cover cloth, trains cover cloth, ships cover cloth, cloth covered open-air yard, industrial and agricultural fields; used in glass, timber, fertilizer plants, steel plants, machinery metal factory, feed mill, grain storage, container plants, oil refineries, packaging plants, paper plants, air conditioning plants, logistics, ore factory, fleet, rail, sea and so hoping to help you

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