The alumina ball is also called the high aluminum accumulation of heat ball.High alumina refractory ball is based on bauxite as the mainly raw refractory material.Adding powder and additives and anchoring agent.After proportioning, molding and high sintering to make it.The production engineering of high alumina refractory ball is similar to that of high alumina refractory brick.It should be based on the properties of raw materials,high alumina refractory ball requires production conditions and other factors to determine.
40-75% refractory alumina ball for hot blast stove
The alumina ball is also called the high aluminum accumulation of heat ball.High alumina refractory ball is based on bauxite as the mainly raw refractory material.Adding powder and additives and anchoring agent.After proportioning, molding and high sintering to make it.The production engineering of high alumina refractory ball is similar to that of high alumina refractory brick.It should be based on the properties of raw materials,high alumina refractory ball requires production conditions and other factors to determine.
The function of high aluminum refractory ball:it mainly stacked in industrial kilns, which can achieve the effect of accumulation of heat.
The application of high aluminum refractory ball : it can be used in the blast furnace ironmaking of Cowper blast air heater, high and low temperature conversion furnace in chemical fertilizer plant, conversion furnace, hydrogenation converter, desulphurization trough and methane furnace.Reformer, hydrogenated converter and desulphurizing tank.,Methane furnace.
High aluminum refractory ball index
|
Item |
High alumina |
Low creep |
Mullite |
Corundum |
|
Size(mm) |
40-80 |
40-80 |
40-80 |
40-80 |
|
AL2O3(%) |
65 |
70 |
75 |
95 |
|
Refractoriness under load(°C) |
1450 |
1460 |
1530 |
1650 |
|
Apparent Porosity(%) |
25 |
23 |
22 |
18 |
|
Bulk Density(g/cm3) |
2.3 |
2.4 |
2.5 |
3.1 |
|
Cold crushing strength(Mpa) |
13 |
14 |
32 |
36 |
|
Thermal shock resistance (1100°Cwater cooling) cycle ≥ |
15 |
10 |
20 |
7 |
|
Refractoriness(°C) |
1710 |
1750 |
1800 |
1800 |
(1)The heat storage capacity is strong and the heat storage effect is good
(2)The creep properties is good.
(3)High compression strength and good abrasive resistance.
(4)The chemical stability is good.
(5)Good resistance to elevated temperatures.
Converter, electric furnace gunning material has the characteristics of high adhesion rate, good high temperature corrosion resistance, etc.
Insulation castables are mainly made up of lightweight refractory aggregates, powders, and binder additives.
Ceramic wear resistant castable is a special material and is a new type of material developed recently. It not only meets the needs of national defense cutting-edge products and high-tech development, but also meets the requirements of the rapid development of the national economy. Therefore, it is easier for users to accept than other materials, so it develops rapidly.
Chrome corundum brick refers to corundum refractory products containing Cr2O3. At high temperature, Cr2O3 and Al2O3 form a continuous solid solution, so the high temperature performance of chromium corundum products is better than that of pure corundum products. Chromium corundum products are widely used, and the content of Cr2O3 is mostly in the range of 9% to 15%.
The alkali-resistant brick for cement kiln has the characteristics of strong alkali erosion resistance, good thermal shock resistance and high cost performance.
Fireclay bricksis suitable for supporting hot blast stoves of large, medium and small blast furnaces
High alumina brick is mainly used for lining of blast furnace, hot blast furnace, electric furnace roof, reverberatory furnace and rotary kiln. In addition, high alumina brick also widely used as open hearth regenerative lattice brick, pouring system with plug,such as nozzle brick.
The refractoriness of clay bricks is comparable to that of silica bricks, up to 1690~1730℃, but the softening temperature under load is more than 200℃ lower than that of silica bricks. Because in addition to the high refractory mullite crystal, the clay brick also contains nearly half of the low melting point amorphous glass phase.
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