Kiln Calcined Bauxite for High Alumina Brick of CNBM in China

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1 m.t.
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10000000 m.t./month

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Kiln Calcined Bauxite for High Alumina Brick of CNBM in China


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. Calcined Bauxite Images

 

Kiln Calcined Bauxite for High Alumina Brick of CNBM in China

Kiln Calcined Bauxite for High Alumina Brick of CNBM in China

 

 

4. Calcined Bauxite Specification

 

Place of Origin:

Henan, China (Mainland)

Shape:

Brick

Material:

Alumina Block

SiO2 Content (%):

International standard

Al2O3 Content (%):

≥65

MgO Content (%):

International standard

CaO Content (%):

International standard

Refractoriness (Degree):

1770°< Refractoriness< 2000°

CrO Content (%):

International standard

SiC Content (%):

International standard

Model Number:

RL-65

Brand Name:

cnbm

Fe2O3 %:

≤2

Refractoriness:

≥1790°C

Apparent porosity:

≤24%

Cold crushing strength (Mpa):

≥49.0

Refractoriness under load(0.2MPa):

≥1500°C

Reheating Linear Change (1500°C, 2h) %:

+0.1~ -0.4

Size:

230*114*65/75

Sample:

free

Price:

factory outlets

 

 

5.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:The fire prevention board line is made of what material?
(1) if it's real wood floor, the line should be made of wood. The ready-made wooden line, walnuts, price range depends on the texture width. The common width is 100 mm. One linear meter is around $17 - $30. Paulownia is cheaper with one linear meter more than 10 yuan. When it is composite wood floor, high-density plate modelling line can be used. The price is commonly between 40 to 80 yuan (2400 x 1200 mm), which depends on the thickness and density and also the factory. There are also imitated wooden aluminium line. (3) if it's the marble ground, you would better use marble line, which is 200 yuan one square meter. It's price is also unequal. The imitated stone is also available. There are a lot of kicking decoration materials and it depends on how you use it. That is to say crural line should be coordinate with the ground. It means that it sjould not only to be beautiful but also to be practical. It would be better if it is relatively cheap as well.
Q:What is the definition and classification of amorphous fire resistance materials?
9.8. brick made of refractory bone material and powder material can be used directly or after adding appropriate liquid formulation Refractory paint. Refractory slinging material 6. Prefabricated cubes, bonding agent or other additives. fire-resistance sparying material compround additives. Refractory pressed into the material, binder. Refractory ramming material 3, The material is a new fire proof material without calcination Heavy aggregate and lightweight aggregate: Inorganic binding agent and organic bond, its fire resistance is not less than 1580. Refractory castables 2 mouldable refractory Classification according to the type of bonding agent: 1. Classification according to refractory aggregate. According to the production and construction method, refractory mud or refractory mire, with a certain proportion of the mixture
Q:How many kilns using refractories are needed? What are the furnaces respectively?
Kiln and five hundred-degree centigrade thermal equipment need to use refractories, glass furnaces, electric arc furnaces, mixer, cement rotary kiln, open hearth furnace and limestone kiln; in fact, when the temperature is more than four, the mesh belt furnace, blast furnace, cupola oven, stove, pushing plate kiln, furnace, heat treatment furnace, roller kiln, down draft kiln, ladle, coke, shuttle kiln,etc.
Q:What are the components of refractory clay?
It is different from non-cement castable refractories, which does not rely on the addition of cement for combination, instead it uses chemical binder. It is refractory castable (also known as chemical bonding castable). Non-cement refractory castable takes oxide or synthetic compound ultra-fine powder or oxide sol-gel which is similar to the chemical composition of material in tungsten castable. Since the use of superfine powder or sol as binder, it has low impurity content, and therefore the refractoriness and slag erosion resistance of the castable will not be reduced. Besides, the self combination in use can help to improve high-temperature structural strength. Non-cement castable refractory is made up of refractory aggregate and powder, superfine powder of oxide or sol, trace amount of dispergator (or anti-coagulant) and proper slow acting hardener. Non-cement castable is mainly coagulated and combinated by ultrafine powder of oxide or sol, therefore, it has certain requirements for ultrafine and sol. Ultrafine powder used refers to less than 1 / zm particles. Ultrafine powder used in non-cement castables are SiO2, Al2O3, Cr2zrOz, etc. SiO micro powder is often adopted, which is the dust recycled during the smelting of metallic silicon, ferro-silicon alloy, the generation process is as follows: This recycled SiO2 powder has an average particle diameter of 0.5 pM, and it is spherical with large surface area. It is amorphous substance with high activity, so it has good bonding strength. The sol used are mainly alumina oxide and silica sol. Silica sol is made by ion exchange of sodium silicate after Na ions are removed. It can also be made after hydrolysis of ethyl silicate. There are several ways of preparing alumina sol, the easiest method is to prepare by the reaction of metallic aluminum or alchlor with hydrochloric acid.
Q:What are the advantages and disadvantages of new external wall fireproof and thermal inuslation matertials?
The new external wall fireproof and thermal inuslation matertials have both the advantages and disadvantages. Advantages: 1)Low requirements on the waterproof, weather resistance and other technical indicators. The dry wall and gypsum plastering mortar, etc. can meet the requirements and can be easily obtained; 2) The inner insulation material are separated by the floor, and construct within a height of only a storey , without erecting scaffold ; 3) In the hot summer and cold winter or hot summer and warm winter area, the inner insulation meets the requirements; 4) The glass beads overcome the shortcomings of expanded perlite, like, large amount water absorption, easy powdering, big volumetric shrinkage in the slurry mixing process, easily leading to post-insulation product performance degradation and hollowing, cracking, and also make up for the defects of polystyrene particles organic materials, like, flammable, poor fire performance, producing harmful gas at high temperatures and anti-aging, poor weather resistance, poor workability and large rebound in construction, ect. Disadvantages of external wall insulation : 1) Since the ring beam, slab and column structure would cause thermal bridges, leading a greater heat loss; 2) It is of low intensity, high water absorption, easy to shrink and crack. The insulation system is prone to cracking, leaking or loss and other common quality problems, especially it is easy to crack at the seams, thus being difficult to exsit as long as the building. 3) It is inconvenient for the users to redecorate and hang ornaments; 4) It takes up indoor used space;
Q:What are the use of fire-resistant material and admixture?
Generally speaking, there are several admixtures: 1. Water reducing agent. It can ensure basic refractory castable flow value and significantly reduce its water mixing amount sodium hexametaphosphate and sodium tripolyphosphate 2. Plasticizer. It can increase plastic refractory mixture and enhance the ability of bentonite clay mud material stress strain 3. Gelling agent. It can make the colloidal solution (or suspending liquid containing solid particles condensed gelling agent 4. Dispergator. It can turn condensation or reunion colloidal particles (particles) into sol or uniform dispersion suspended particles and make the thick colloid free stream sol said scattered coagulant peptizer 5. Coagulant. It can shorten the stereotypes refractories condense sclerosis NaOH Mars between aluminum hydroxide, etc. 6. Retarder. It can delay the stereotypes refractories condense sclerosis between citric acid tartaric acid, etc. 7. Delayed coagulant. It can make setting fire-resistant materials contain binder by set out the condensation hardening effect between calcium aluminate cement, etc. 8. Foaming agent. It can reduce the liquid surface of power to produce uniform stability as rosin soap bubble resin fat saponin and so on. 9. Antifoaming agent. It can make fast setting fire-resistant material mixing or shock in produce bubbles escape alcohol fatty acids, such as 10. Shrink agent can reduce or prevent the refractory materials used to produce contraction type heating said silicon powder stabilizer or volume expansion agent, etc. 11. Preservative. It can keep setting fire-resistant material stored on construction performance change or change oxalic acid citric acid, etc. 12. Inhibitors. It can inhibit stereotypes refractories ingredients contain iron or iron compounds and acidic reaction caused inflation to produce hydrogen bond CrO3 diacetone alcohol, etc. I hope it can help you.
Q:What are the filling refractories in door leaf of class A fire resistant door?
Perlite!
Q:Does anyone know about the A-level fireproof materials?
A1-level fireproof materials include: 1. inorganic materials: glass wool, rock wool, foam glass,etc. 2. organic materials: phenolic foam insulation composite board. I hope my answer can help you.
Q:Who knows about the grade C fireproof door materials?
There are no differences in the interior materials of the grade A , B and C fire doors, they all use fire rock wool boards. The only difference is the thickness of built-in fire rock wool boards. The rock wool boards' thickness of grade A fire doors is 52 mm, that of grade B is 46mm, and that of grade C is 40 mm.
Q:Who knows what material is in the center of fireproof rolling curtain?
made of inorganic super fireproof rolling curtain: Glass fiber cloth ceramic fiber cloth (reinforced stainless steel wire) ceramic fiber blanket aluminum foil cloth. Hope my answer will help you.

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