The term of service of hot-blast stove asks to achieve commonly 10 to 20 years, need firebrick bears the loading of self-prossessed generation is very big, consequently the requirement fights the phosphate with creep good performance to combine tall aluminium below loading of use high temperature fireproof. Pass function of long to all sorts of firebrick high temperature creep to compare. Silica brick is fastened in 0. LMPa loading and heat determine below the condition of 1550 ℃ ; The loading that siliceous aluminous qualitative firebrick brings to bear on is 0. 2MPa, heat temperature is mixed for 1350 ℃ respectively 1300 ℃ . Silica brick is had fight function of high temperature creep primely, high temperature creep leads minimum; It is tall aluminous qualitative firebrick next, include to use tall aluminous aluminous grog and silicon line stone kind mineral the brick of tall aluminium of electric stove be of use that makes for raw material, their fight function of high temperature creep very good also, and the compositive composition of firebrick approachs Mo Laishi part more, the denaturation of the brick that fight squirm can be better. But, density of silica brick bulk is lesser, ability of accumulation of heat is poorer, when 600'C is the following, easy happening brilliant change, destroy integral sex. Accordingly, set the low use temperature of silica brick, should be more than 600 ℃ commonly, additional, want to undertake cautiously when microtherm phase drying-out, in order to assure brilliant model slow change and do not injure body of build by laying bricks or stones. Hot-blast stove uses the bulk stability of all sorts of firebrick to compare hot-blast stove to use firebrick to ask to have very excellent bulk stability. Because the temperature of hot-blast stove produces periodic frequent change, consequently use firebrick should have good bulk stability and even heat to expand, in order to assure large firebrick the integral stability of structure of system of build by laying bricks or stones. Watch Glenn gave silicon qualitative firebrick below, stick earthy firebrick, all sorts of hot-blast stove checker brick such as qualitative firebrick of tall aluminous qualitative firebrick and andalusite material heat below different temperature the bulk after 2h changes. The bulk stability of firebrick is the main function of the stable reliability that affects fireproof material build by laying bricks or stones to build system. The bulk after all sorts of hot-blast stove compare firebrick sort to burn temperature ℃ to burn 2h again again with stability of bulk of brick of tall aluminous aperture changes hot-blast stove of 1600+0.3% of tall aluminous qualitative firebrick uses 1500+0.255% AL2O31500+0.260% AL2O31500+0.270% AL2O3 of firebrick of andalusite of 1400-0.250% AL2O3 of qualitative firebrick of clay of 1500+0.442% AL2O3 of % silica brick function of firebrick of different figure grid quite. The thermal efficiency of hot-blast stove still has close relationship with the design of grid firebrick, the total area of the checker brick inside unit volume is larger, mat exchange efficiency is taller also. According to introducing, on the tradition, hot-blast stove checker brick piles up build by laying bricks or stones with rectangular firebrick, but because thermal efficiency is low, already by other efficiency tall brick replace. The checker brick that uses generally now can be divided it is 4 kinds. Among them each kinds can be divided again mix for standard type efficient model two kinds. Efficient model grid firebrick is had bigger heat area, thermal efficiency is so taller. But the bricky wall as a result of them is thinner, likelihood happening is out of shape, at the same time because flue is lesser, bigger ' causes pressure loss easily jam. Accordingly, efficient model checker brick should use high quality fireproof material to make, explode to blast furnace at the same time gas should be adopted purify measure accordingly. 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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