What material makes heat preservation brick?

Heat preservation brick has a lot of with the material that arrive, according to chemistry cent is neuter, alkalescent with acidity, capable person of commonner product of heat preservation brick has clay, tall aluminium, Molaishi, silicon to be waited a moment character character.


Brick of light qualitative heat preservation is in firebrick the person is added in making after certain and special material firing. Its porosity is a lot of taller than common firebrick, . Coefficient of thermal conductivity is small, because this can use the thermal insulation that serves as furnace or liner, in order to reduce hot loss; To the furnace that intermittent type works, boiler setting accumulation of heat and heat loss due to radiation can decrease 80% .
What material makes heat preservation brick? Basically have simple product of light qualitative clay, light qualitative tall aluminium, silicon. Silicon pledges heat preservation brick is heat-insulating material of a kind of high temperature, have tall purity, high strenth, Gao He the characteristic such as soft, small air hole, low matter content. Counteractive and acidity gas erodes ability stability of bulk of strong, high temperature is good, high use temperature 1420 (℃ ) . Adiabatic thermal insulation removed on industrial kiln furnace, reduce the specific power consumption, effect that improves thermal efficiency, and still protect lining main body effectively to be able to bear or endure material, prolong the service life of kiln furnace. Now already more and more be applied extensively at body of heater of kiln of frit of of all kinds high temperature. In vitreous kiln furnace, basically use at regenerator wall and Xuan top.
Brick of argillaceous heat preservation calls clay qualitative adiabatic brick again is the Al₂O₃ content that controls for main raw material with saggar the adiabatic and refractory products that is 30%~48% . Its produce craft to use burn oneself out to add content law and bubble way. With saggar, float bead, saggar grog makes raw material, mix into is added bond and curium wood chip, classics burden, mix, shape, dry, firing.
The Al2O3 content that brick of tall aluminous heat preservation controls for main raw material with aluminous alumina is not less than the adiabatic firebrick of 48 ％ . Tall aluminous qualitative adiabatic firebrick, basically use aluminous aluminous grog, combinative clay makes raw material, mix into is mixed into bond curium wood chip, to improve product performance, add the fine pink of stone of line of industrial alumina, corundum, silicon, cyanite, silica. Can make the product that gets above of Cm3 of ／ of bulk density 0.4g. Al2O3 content and bulk density are different, high use temperature is different also, be in normally 1350 ℃ of 1250 ～ , some can amount to 1550 ℃ .
Production methods basically has heat preservation brick 3 kinds: (1) can light accretion way, it is easy to join wood chip or anxious pink and so on in burden namely the combustible of burn-up, when the brick firing burn-up of the combustible in the process, leave a large number of hole inside the brick. This is commonly used method; (2) bubble law, add person colophony black to wait for blowing agent in burden namely, next firing and poriferous goods; (3) chemical law, some kind of substance is added in burden, can produce bubbly chemical reaction. For example dolomite or square magnesian stone add gesso, with rare vitriolic make foaming agent, generation is many from, instantly mould shapes, dry hind firing.
Because pledge gently many stoma is contained in heat preservation brick, very bigger than the surface, the be heated when using and fall like self-prossessed action in bear, the easy happening that systole is out of shape and make heat proof quality is reduced. Accordingly, in asking to pledge the bulk of heat preservation brick and appearance are using a process for a long time gently, can keep stable. Ask to have good bulk stability namely. Otherwise, contractive action can bring about body of heater to the structure is out of shape and produce crackle, increase heat loss due to radiation.
Loss of accumulation of heat of body of build by laying bricks or stones of industrial kiln furnace and heat loss due to radiation of surface of body of heater, the 24 ～ that take specific fuel consumption about commonly 45% . With thermal conductance the light qualitative brick with low, small thermal capacity makes material of construction of body of heater, can save specific fuel consumption; In the meantime, because kiln furnace can rise gentle refrigeration quickly, can raise equipment to manufacture efficiency; Still can reduce weight of body of heater, simplify kiln furnace is tectonic, improve product quality, drop environmental temperature, improve labor condition.
Heat-resisting function is a of brick of light qualitative heat preservation main index. The hear resistance of brick of light qualitative heat preservation allows to use temperature not to depend on normally their fireproof degree, basically is to depend on resistance is heating action produces contractive metabolic ability. The burns contractive quantity in order to weigh to not be more than ％ commonly temperature on international regards light qualitative heat preservation as use temperature of the brick. To the heat-insulating material of same breed, use temperature is commonly rise as the accretion of bulk density. Apparent, because be in the stuff with bulk old density,this is, the union between solid photograph grain is mixed continuously quite firm, can maintain taller bulk stability consequently.
Cheng Naicai annals is in flourish industrial dedicate oneself to the service of one's motherland, industry of service high temperature is oneself, we bear tens of year the technology is accumulated, active and before look up ground is high temperature industry will make tomorrow make brand-newly, become hard " boiler and expert of liner of furnace of hot project kiln " .