Checker brick
Low creep checker brick is a kind of high-powered fireproof data, basically use at the checker place of furnace of kiln of high temperature industry, in order to improve the thermal efficiency of kiln furnace and service life. Its produce a process to involve select material, burden, shape, dry, firing wait for many measure. It is detailed manufacturing technology introduction below:
1.Select material and burden raw material choose: The alumina that low creep checker brick uses tall purity normally (Al₂O₃ ) , silicon (SiO₂ ) wait for raw material, add a few clay or other and auxiliary data will adjust function. Burden comparing: According to the technical requirement of the product, control each constituent strictly deserve to compare, ensure the product has good low creep performance. Typical burden includes tall aluminous grog, clay, additive to wait.
2.Shape mix: Press the raw material of make choice of deserve to compare mix, ensure uniformity. Right amount water or binder can be joined in mixture process, shape in order to rise function. Shape method: Use high pressure to shape craft, if work,control a standard, etc static press a law to wait, ensure base substrate is close-grained and even. When shaping, should notice to avoid the generation of air hole and crackle.
3.Dry nature is dry: Nature has below room temperature dry, make the moisture inside base substrate evaporates gradually, avoid fast and dry the craze that bring about. Drying chamber is dry: Microtherm drying undertakes inside drying chamber, accelerate moisture to evaporate speed, ensure at the same time even and dry. Ordinary control is in stoving temperature between 100-200 ℃ .
4.Firing warm up level: Undertake in channel kiln or shuttle type kiln firing. Warm up process should slow, avoid base substrate changes suddenly because of temperature and craze. Warm up normally speed control is in horary 30-50 ℃ . Firing temperature: Firing temperature is in commonly 1400-1600 ℃ , specific temperature asks to decide according to material and product. Firing time is 24-48 hour normally. Drop in temperature level: Be in firing after finishing, drop in temperature gradually inside kiln furnace, avoid the thermal stress craze that temperature pelter brings about.
5.Examine with the visual examination that pack: Appearance of examination brick substance whether level off, flawless, wait for blemish without air hole. Dimension examination: Whether does the dimension that examines bricky system with measure accord with a requirement. Manage changes function to detect: Detect the manage of the product turns performance, include rate of intensity of compression intensity, compression of apparent pore rate, normal temperature, creep to wait, ensure the product accords with design requirement. Pack: Eligible product undertakes packing, prevent to carry the attaint in the process.
Of low creep function assure tall purity raw material: Use the raw material of tall purity, reduce matter content, from go up at all assure low creep function. Reasonable burden: Through deserving scientificly to compare, optimize material interior structure, promotion fights creep function. Shape advancedly and firing craft: Use high pressure shapes and strict firing control, ensure the compact sex of the product and uniformity, reduce creep.
According to above content, the production of low creep checker brick is a complex process, need controls the operation of each link and technical parameter strictly, actor or actress in order to ensure the high quality of the product is mixed fine function. This kind of material has fundamental application value in furnace of kiln of high temperature industry, can promote kiln the thermal efficiency of furnace and service life significantly.
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