Al2O3 88% Calcined Bauxite of China Bauxite Ore

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China main port
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TT OR LC
Min Order Qty:
25 m.t.
Supply Capability:
20000 m.t./month

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Product Description:

Product Description

Mingyue Bauxite and Calcined Bauxite:

 

Mingyue Bauxite, ie. bauxite ore, whose main content is Aluminium oxide with, who is department of hydrated

alumina containing impurities in appearance of earthy mineral;

 

Mingyue Calcined Bauxite is burnt bauxite, who is used for producing the existing uneven materin in nature --

alumina and aluminium. The purpose of calcining bauxite is to remove crystal water and improve the content of alumina. 

 

Mingyue Bauxite Secification:

 

Al2O3

Fe2O3

TiO2

K2O+Na2O

CaO+MgO

Bulk density

≥65

≤2.5

≤4.0

≤0.3

≤0.5

≥2.6

≥75

≤2.5

≤4.0

≤0.3

≤0.5

≥2.7

≥80

≤2.5

≤4.0

≤0.3

≤0.5

≥2.8

≥85

≤2

≤4.0

≤0.3

≤0.5

≥3.0

≥86

≤2

≤4.0

≤0.3

≤0.5

≥3.1

≥87

≤2

≤4.0

≤0.3

≤0.5

≥3.2

≥88

≤1.8

≤4.0

≤0.25

≤0.5

≥3.25

 

Mingyue Refractory Bauxite Level:

 

Level

Chemical Composition (%)

Refractoriness

(℃)

Bulk Density

(g/cm3)

Al2O3

CaO

Fe2O3

superfine

>85

<0.6

<1.4.0

>1790

>3.6

first grade

>80

<0.6

<3.0

>1790

>3.0

second grade+1

70~80

<0.8

<3.0

>1790

>2.8

sencond grade

60~70

<0.8

<3.0

>1770

>2.65

third grade

50~60

<0.8

<2.5

>1770

>2.55

Product Uses

Mingyue Bauxite and Calcined Bauxite:

1. Aluminum industry;

2. Precision casting;

3. Refractory industry;

4. Silica acid aluminum firefibre;

5. Mixed with magnesium oxide, it can be an nice bonding agent, especially for pouring entire steel teeming ladle lining;

6. Manufacture bauxite cement, grinding abrasives;

7. Ceramic industry, and chemical industry for making aluminium compounds.

Al2O3 88% Calcined Bauxite of China Bauxite Ore

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Q:What do refractory materials include?
What refractories are included? Refractories include AZS brick, corundum brick, direct-bonded magnesia-chrome, carborundum brick, silicon nitride bonded silicon carbide brick, non-oxide refractory materials such as nitride, silicides, sulfides, borides and carbides, oxidation calcium, chromium oxide, aluminum oxide, magnesium oxide and beryllium oxide.
Q:what is the material of fixed first rate fire resistant window?
Window frames and fireproofing glass, fire sealing strip, fireproofing glass mound layer, which is infexible fan, and the flexible fans have to plus folding and closing window cleaner. (3) window frames must be integral with the building, using wood or iron to connect the wall. After the installation of the steel frame, the cement mortar must be watered between the window frame and the wall, and it should conserve more than 24 hours before normal use.
Q:What are refractory materials?
Refractories can be divided to two categories based on the shape and three categories according to the chemical nature of acidity, neutralily and alkalinity. Alkaline refractory materials are magnesia-carbon brick, magnesia chrome brick, calcium magnesium brick and magnesia-chrome bricks. Neutural refractory mateial are high alumina brick, corundum brick and clay brick. Case-hardened refractory materials are castable, ramming mass, gunning mix, coated mix, dry vibration material, etc.
Q:What's the refractoriness and how to measure the refractoriness?
Bottom each side length is 8 mm and upper side length is 2 mm. Under a certain temperature-rising speed, when heating, refractory's resistance to high temperature from melting is called refractoriness. The properties of cross section into an equilateral triangle and height is 30 mm. When it bends down until the vertex and chassis contact temperature is the refractoriness of sample. It bends due to the influence of its weight. Make the will-measured material into standard pyrometric cone.
Q:How many refractory materials does the annual output of 1 million tons of coke oven require?
The production of dense synthetic Magnesium Oxide requires many steps, briefly summarized as follows:(1) Mgcl2+Ca, Mg (OH) 2, =Mg (OH) 2+CaCl2Sea salt or brine, dolomite, magnesium hydroxide, residual salt(2) Mg (OH) 2 Mg0 (low density);(3) MgO, Mgo (compact)The resulting compact Magnesium Oxide generally has a purity of up to 95%-99%, depending on the manufacturing process and the final application requirements. As shown above, Magnesium Oxide can be obtained from sea water and slaked lime. The density of the final product is through the high temperature roasting in shaft furnace and the large area obtained by calcination, and the mechanical compaction. Through the pre sintered refractory material to fundamentally eliminate the permanent contraction or extension is extremely important, it is obviously, because we cannot expect excessive contraction or extension in the use of the materials can be used to store the proper degree of molten metal or slag. The production of magnesium oxygen throughout the world (Fang Meishi) large factories in the United States, Michigan by brine well production, and by the sea water production Magnesium Oxide factory is located in Florida, Texas, California and Maryland.
Q:How to classify the grade of wall fireproof and thermal inuslation matertial?
External wall thermal insulation materials are mainly divided into grade A, grade B1, grade B2 and grade B3. In accordance with the current "Combustion Performance Classification Method of Building Materials", grade A thermal insulation material is incombustible material and belongs to inorganic heat preservation material. However, grade A thermal insulation material is few in terms of the current market. There are only JETCO YT inorganic active wall thermal insulation material, glass wool, rock wool board, foam glass, vitrified micro bead and grade A fireproofing thermal insulation board. However, compared with grade A thermal insulation material, the more welcomed by the market is the organic insulation materials. Thermal insulation material that is determined as grade B is divided into three levels. Grade B1 is grade is flame retardant. Grade B2 is combustible. Grade B3 is flammable.
Q:What kind of flexible fireproof material is really good?
The best one is grade A fireproof material. A-class fire flexible material adopts clay, stone, sand, cement blocks and other inorganic powder and modifier and product density is 2327 kg/m3. Upon examination, the combustion performance of this product is in accordance with the grade A specified requirements and additional classification meets A s2, d0, t0 level requirements. According to GB 8624-2006, the combustion performance of product reach A2 - s2, d0, t0 level.
Q:What high-molecular polymers can be used as fire-resistant material binder?
Lignin is the least expensive.
Q:What parts of cement kilns are refractories used on?
Generally they are used in cyclone, feed pipe, and duct and refractories are high-strength alkali-resistant castable, calcium silicate board, high-strength alkali-resistant brick, dome-shaped alkali resistant brick. Refractories in smoke chamber are high-alumina refractory castable, anti-skinning pouring material and calcium silicate board. Refractories in duct are high-strength alkali-resistant bricks, calcium silicate boards and steel fiber reinforced castable. Refractories in hooding parts of kiln are high strength castable high alumina and calcium silicate board. Refractories in rotary kiln are phosphate bonded high alumina brick, silmo brick, magnesia chrome brick, steel fiber reinforced castable. Refractories in grate cooler are vault alkali brick, high alumina refractory castable, steel fiber reinforced castable and calcium silicate board. Refractory in coal burner is dedicated castable for coal burner.
Q:Does refractory belong to metallurgical auxiliary materials?
Refractory includes metallurgical auxiliary materials.

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