Of the firebrick with brick of light qualitative heat preservation and general and same qualitative capable person fireproof degree differ not quite, loading softening point criterion slightly low. If light qualitative brick is long-term when be used below high temperature, can continue agglomeration break systole, cause crackle to be destroyed even. So majority pledges the brick has — gently the problem of high use temperature, if pledge gently argillaceous brick is tall have 1150 ℃ only, light qualitative tall aluminous brick uses temperature not to exceed 1350 ℃ , pledge Mo Laishi brick uses temperature not to exceed 1500 ℃ gently, light qualitative silica brick can amount to 1600 ℃ . The problem with because light qualitative silica brick is nonexistent contractive high temperature, volume is steadier, accordingly can build by laying bricks or stones of in order to builds the liner that enrages a contact with furnace directly. The manufacturing technology of brick of light qualitative heat preservation (1) is classified by density of body trifoliate orange. Bulk density is in of 0.4~1.3g/cm3 for; of light qualitative brick under 0.4g/cm3 to exceed light qualitative brick. (2) presses use temperature classification. ℃ of use temperature 600~900 pledges for microtherm;900~120 ℃ is the brick gently in; of lukewarm light qualitative brick exceeds 1200 ℃ pledge gently for high temperature brick. The production methods of brick of light qualitative heat preservation and general and compact material differ somewhat, the method is very much, basically have burn ashes to join content law, bubble law, chemical law and law of porous material to wait. 1) burns ashes to add content way. Also call combustible to add a way. The combustible that burns ashes easily is joined in the pug that makes a brick, the end that be like charcoal, curium wood chip, make goods is in firing hind have certain air hole. Law of 2) bubble . Person foaming agent is added in the pug that makes a brick, the toilet soap that be like a pine, what make with mechanical method is bubbly, poriferous product is acquired after classics is firing. 3) chemical law. Use the chemical response of gas of can proper generation, a kind of poriferous product is acquired in the process that make a brick, add gesso with dolomite or square magnesian stone normally, with vitriolic make foaming agent. Standard of 4) porous material. With natural diatomite or grog of artifical clay bubble, alumina or zirconia the porous raw material such as hollow ball is made take light qualitative firebrick. Use thermal conductance the brick of light qualitative heat preservation with low, small thermal capacity makes material of construction of body of heater, can save; of specific fuel consumption to be able to raise equipment to produce efficiency; to still can reduce weight of body of heater, simplify kiln furnace is tectonic, improve product quality, drop environmental temperature, improve labor condition. Brick of light qualitative heat preservation is used to do the thermal insulation of kiln furnace, liner or heat-insulation layer more. How is thermal insulation made? When brick of production heat preservation and the fireproof thermal insulation that blaze contacts, commonly used with the method that convenient method is bleb law and burn down addition agent. In expecting for Xiang Ni, infiltrate gas, have two kinds of methods: 1, first with mechanical method to suspension infiltrate inside fluid air, make the bleb inside pug stable with stabilizing agent next; 2, add blowing agent to the middle of suspension fluid, this kind of reagent makes gas after interaction, gas makes pug builds poriferous structure, this is stabilized with stabilizing agent after poriferous structure. Want to save the empty bleb inside slop to reduce the exterior pulling force of suspension fluid, add blowing agent commonly for this. Join inside Xiang Ni makings a large number of can the blame plasticity stock of imbibe, for example clinker, or mix into enters the crystallization substance that contains water of many to hydrate, with respect to OK and stable bubble. To make slop fleeciness, add carbonic acid body and acid to the middle of suspension fluid kind aluminous perhaps, metallic etc reagent, lend its chemical reaction and send angry bubble. To achieve this kind of goal, what often use in abroad is dolomite is mixed vitriolic, think they are cheap industrial raw material. Use half water gesso and material of other water rigid to serve as stabilizing agent. The pug of heat preservation brick is in caky hind undertake fast and dry and firing. Firing goods repass machining, make its have the appearance of need and measure. Fireproof material occurrence craze, fall off, easy how to wear away to do? Want to solve a problem thoroughly, need to be dug from germ, the analysis gives real reason, flourish Cheng Naicai is engaged in be able to bear or endure service of timber production, research and development is old, can solve all sorts of difficulty problems of liner of furnace of high temperature kiln, welcome broad new old friend to seek advice reach technical communication.
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