Firebrick is simple for it is combustion of a kind of ability and high temperature resistant brick body, its fireproof degree depend on 1700 ℃ controlling, use burden of classics of fireproof raw material normally, shape, roast and make. Firebrick can make the firebrick that makes different use according to using raw material, the firebrick that can make those who make different appearance according to using position.
One, firebrick is phyletic
Brick of argillaceous firebrick, tall aluminous firebrick, corundum firebrick, silica brick, magnesia brick, light qualitative adiabatic firebrick, Mo Laishi firebrick, carbon is waited a moment.
2, firebrick utility
Firebrick basically is used at making all sorts of industrial kiln oven, if build by laying bricks or stones builds kiln of forge of puddling furnace, steel-making furnace, coking plant furnace, glass, cement, steam boiler, all sorts of heat treatment furnace, heating furnace, with the liner of furnace of kiln of etc high temperature. The firebrick of different breed cannot be mixed with, when build by laying bricks or stones builds firebrick, the fireproof sludge that should use as same as firebrick variety does cementation to expect.
3, firebrick appearance
Firebrick treatment makes appearance have a variety of, but common firebrick appearance has a level brick, special shaped brick and distinctive model brick. Standard brick is being produced is according to occupation standard or country the relative standard such as the standard is produced. Special shaped brick, distinctive model the brick has blueprint above all when production, make a mould be in according to blueprint treatment is custom-built. The norms of standard brick has a lot of kinds, specific want a foundation kiln furnace demand is custom-built.
4, firebrick is characteristic
1, chemical composition composition: The character of the body of bases decision brick of firebrick and fireproof spend character.
2, bulk density: Bulk density is bigger, demonstrative firebrick is compact the gender is good, intensity is high, coefficient of thermal conductivity may be big; conversely compact sex is small, intensity is low, heat preservation effect is good.
3, apparent pore rate: Apparent pore of firebrick of general high density is led in 3%-10% , common and compact firebrick is in 20%-30% , light qualitative firebrick is in 45%-48% .
4, loading bate temperature: It is firebrick bears constant press negative charge and with warming up certainly of speed heat temperature of metabolic of the generation below the condition, it stated fireproof stuff is right high temperature and loading at the same time the counteractive ability of action. Like the Molaishi that Ruiwosheng produces temperature of bate of loading of firebrick RM-35 0.2mpa is in 1650 ℃ , and the brick uses this kind of Molaishi at sirocco conduit director and orifice place, the working environment of this place is controlled in 1200 ℃ , because this not comes,stone firebrick uses herein is more than sufficient.
5, heatproof shake function: Firebrick can bear extremely extremely hot cold temperature changes and be not destroyed, if argillaceous brick is usable the molten iron at molten iron canister is full-dress reach carry.
6, compressive strength: Firebrick falls in constant temperature (show normal temperature condition falls commonly) the ultimate load that can bear on unit area and is not destroyed.
7, ratio of the heavy change that burn a line: Firebrick is heating to set temperature and heat preservation times, refrigeration spends place to the remains of generation contracts or expand to body length of the brick after room temperature, + number expresses to expand, - number shows systole. Line change ratio is an aspect that demonstrates stability of bulk of firebrick high temperature, if systole is too big, can bring about firebrick to fall off etc.
The character of firebrick and content of composition of firebrick raw material have immediate concern, content of composition of firebrick raw material is different, character also has difference. Firebrick uses an environment to differ, the firebrick character of the requirement is different also.
5: Firebrick makes technological process
Preparation of makings of pink of —— of raw material choice (broken, smash, screening) —— of —— scale burden mixes refine —— to make big shape —— of agglomeration of —— dry —— examines —— is packed
6, firebrick norms
According to GB regulation, cent of general firebrick norms is brick of wedge of brick of brick of straight form brick, side thick wedge, perpendicular thick wedge, vertical section and arch foot brick 5 sort. According to standard of size of general firebrick shape, dimension of firebrick of straight body level is 230mm×114mm×65mm. This norms is a norms of straight form brick only. Because firebrick norms is more, do not explain one by one, specific can consult " size of general firebrick shape " GB.
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