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Henan Split to introduce what kind commonly used firebrick

source:Henan Lite Refractory Material Co.,Ltd  date:2015-01-07  number: Secondary

°°°°Firebrick is acting on the basis of high-temperature materials technology, mainly used in a variety of industries such as construction pit furnaces, different kinds of firebrick also due to chemical mineral composition differences and the different production processes of microstructure, showing the different basic characteristics. Here Henan Split for everyone a brief look at what the major categories of refractory bricks.

°°°°First, silica brick refers containing more than SiO293% of firebrick, refractory bricks are the main varieties of acid. It is mainly used for masonry oven, but also for a variety of glass, ceramics, carbon calciner, refractory brick vaults and other load-bearing parts of thermal furnace, high temperature load-bearing parts of the stove also used, but not in below 600 °ś and the temperature fluctuations in the use of thermal equipment.

°°°°Second, clay, mainly by mullite (25% to 50%), glass phase (25% to 60%) and cristobalite and quartz (up to 30%) of the composition. Usually hard clay as raw material, previously calcined mature material, and then with soft clay, to semi-dry or plastic molding method, the temperature at 1300 ~ 1400 C fired clay products. You can also add a small amount of sodium silicate, cement and other binders made no burning products and amorphous materials. It was a blast furnace, stove, furnace, power boilers, lime kiln, rotary kiln, glass kiln, ceramic and refractory brick kiln firing commonly used in refractory bricks.

°°°°Third, high alumina brick, high alumina brick mineral composition of corundum, mullite and glass phase, depending on its content AL2O3 / SiO2 ratio as well as the type and quantity of impurities, according to the content of refractory bricks AL2O3 classification. Raw materials for the high-alumina and sillimanite class of natural ore, but also mixed with fused alumina, sintered alumina, synthetic mullite, and with different proportions of alumina and calcined clay clinker. It is more production by sintering. But products are cast brick, brick melt tablets, not brick and unshaped refractory bricks. Alumina bricks are widely used in the steel industry, non-ferrous metal industry and other industries.

°°°°Fourth, corundum brick, corundum brick refers AL2O3 content is not less than 90%, with corundum as a main phase of refractory bricks can be divided into sintered corundum brick and fused corundum brick type.

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