refractory bricks import

The refractory materials we product are sold not only into domastic country, but also international countries.The amont of refractory bricks export can be 30% in total sales. some common refractory bricks are as follows:
①、clay brick
Refractory clay brick is the largest production, the most widely used. The raw materials used are refractory clay and kaolin; such resources in China is very rich, good quality, cheap.
The main components of clay brick are: Al2O3 30 ~ 48%, SiO2 50 ~ 600%. There are a small amount of impurities, like Fe2O3, K2O, Na20 and so on. Clay brick surface color is yellow-brown, containing more Fe2O3, and the color is deep. There are black spots on the brick surface, the less black spots, the better quality.
Clay brick is a neutral refractory, load softening start temperature is 1350 ℃, the temperature when using should not exceed 1300 ℃. Good resistance to rapid cooling and emergency performance，up to 20 times。
②、High alumina brick
High alumina brick is the aluminum silicate refractory that content> 48% A1203, the other composition is SiO2, and the amount of impurities is very small.The raw material is mainly rich high-alumina bauxite. High aluminum brick color is light yellow or close to white, and its refractoriness and load softening start temperature are high than clay brick, slag resistance is good, compressive strength is also large, anti-temperature abrupt change is very good. The main drawbacks are the large reburning contraction and the expensive price. It is mainly For steel stoves, resistance furnace and so on.
High alumina brick is A1203 content> 48% of the aluminum silicate refractory, the other composition is SiO2, the amount of impurities is very small: the raw material is mainly rich in high-alumina bauxite. High aluminum brick color is light yellow or close to white, its refractoriness and load softening start temperature than clay brick, slag resistance is better, compressive strength is also large, anti-temperature abrupt change is very good. The main drawback is the heavy burn contraction larger, and the price is more expensive. For steel stoves, resistance furnace and so on.
③、Semi-silica bricks
Semi-silica bricks are one of semi-acid refractory materials, made of quartz and refractory clay. It is characterized by a small contraction of the burner line and good slag resistance. It is Mainly used for converter furnace, electric furnace, iron furnace, etc..
④、Silica bricks
Silica bricks content SiO2 more than 93% , is the acid refractory material made by the silica lime, adding lime and clay. The high temperature strength of Silica bricks is good, the load softening temperature is almost close to the refractoriness, up to 1650 ~ 1660 ℃, and the stability is good above 600 ℃, volume expansion occurs when heating. Mainly used in steel-making furnace. Coke oven, glass melting furnace, etc..
⑤、lightweight and  ultra-lightweight bricks
The chemical composition of lightweight bricks are the same as that of heavy bricks, but contains more stomata, which is not only resistant fire and adiabatic. The density of heavy refractory bricks is generally 2.1 to 2.8 g / cm. , The density of light refractory bricks is 0.4 ~ 1.3g / cm3. and  the density ultra-lightweight refractory bricks is ≤ 0.3g / cm3. .
Lightweight brick refractoriness is  1100 ~ 1300 ℃, mainly used for the insulation layer in the furnace, reducing the heat loss of equipment and reduce fuel consumption. But its poor thermal stability, low slag resistance and pressure strength cause it can not be used as a direct contact with the flame or slag lining.
⑥、magnesium bricks
there are mainly magnesium bricks, and also magnesium aluminum brick, magnesia chrome brick and so on.
Magnesium brick is content of about 85% magnesium oxide, which is alkaline refractory, and its high refractoriness is above 2000 ℃, but the thermal stability is poor, only 2 to 3 times. Mainly used for alkaline furnace, electric furnace wall and furnace bottom, but also for non-ferrous metal metallurgical furnace and refractory kiln firing kiln.
⑦、Carbon bricks
Carbon brick is made of anthracite, coke as raw material, adding asphalt and other bonding agent, heating, mixing, molding and firing in the reduction atmosphere. Carbon content is above 85 ~ 90gqb.
Carbon brick is characterized by high refractoriness, slag resistance,good thermal stability , high temperature structure strength and wearable. It can be used for blast furnace hearth and bottom, iron alloy furnace lining and aluminum electrolytic cell.
⑧、Fused zirconia corundum brick
Fused zirconia corundum brick is divided into 33 #, 36 #, 41 # three, mainly used in the glass furnace.
If you have the need for import of refractory bricks, please contact us directly. We can  give you the best price and ensure the quality.