Roller path kiln should consider the following when choosing light qualitative firebrick: 1. Working temperature, use temperature for a long time namely. The high use temperature of it and adiabatic firebrick is concerned. In foreign standard, high use temperature (classify temperature namely) it is to point to maintain 24h continuously its burn a line to change to not be more than the experimental temperature of 29 again, but the working temperature that this temperature cannot regard adiabatic firebrick as. Is normally foreign practice: ? ぷ Chi shows magpie to throw Shen to cast bridle shows?0% burning Li to classify temperature to decrease 40 ℃ again. For example the working temperature of JM26 (℃ ) =1430-10%*1430-40-1247 ℃ . Because our country weighs the true proved recipe of the change that burn a line,did not cut truly in the law indicate time of its heat preservation is 24h, when because this examines to pledge firebrick burns a line again gently in select material,changing, make clear for 24h, undertake by ASTMC210. 2. Compression intensity is fireproof material is normally rely on fluid photograph and generate strength, intensity is meant high in firing the fluid photograph capacity of the generation inside the base substrate below temperature is much. These fluid photographs are cooling exist with vitreous photograph for the most part to room temperature, brittleness is big, make the thermal shock stability of material is reduced, because this is light,compression intensity is not answered to raise exorbitant requirement when firebrick select material character. To making the same score condole to carry roller path kiln on the head character, its wall aspect pledges firebrick basically bears gently self-prossessed. Be opposite for example the kiln wall of tall 1.5m, pledge great pressure of firebrick place susceptive is 0.15kg/cm2 gently, of course this pressure below high temperature can increase. Be carried to facilitate and construction, consult foreign experience, 0.8g/cm3 and 1.0g/cm3, the light qualitative firebrick of class, its compression intensity is controlled in 15kg/cm2 and 20kg/cm2 respectively can. 3. Thermal shock did not raise a requirement to light qualitative firebrick in stability abroad each standard, also did not examine standard. This index is the comprehensive report of material function, having main effect to the life of kiln furnace. Carry out a proof, the attaint of light qualitative firebrick basically is craze and broken end, drop horn. Consult the actual measurement index of stability of thermal shock of domestic and international light qualitative firebrick, the light qualitative firebrick to layer of job of position of high temperature of roller path kiln, should ask its 950 ℃ are more than 15 times to the circular time with cold wind. The method that increases compressive strength of light qualitative firebrick pledges gently because firebrick makes the matter such as craft, the product that production comes out often compares tall aluminous brick in intensity or argillaceous brick is a lot of poorer, general need increases its compressive strength through a few craft. Improve light qualitative firebrick the method of mechanical function, specific be: Macerate of will light qualitative firebrick is in organic silicon solution, immersion time is 2 ～ 5 hours; The solidify in taking out light qualitative firebrick to put oven receives the compound brick form of organic silicon and firebrick, solidify temperature is 200 ～ 250 ℃ , solidify time is 2 ～ 5 hours; State place compound brick body to be put into atmosphere furnace to heat up splitting decomposition again, temperature of hot splitting decomposition is 800 ～ 1300 ℃ , time of hot splitting decomposition is 1 ～ 3 hours, drop in temperature to get to room temperature modified pledges gently what narrating next firebrick; Whole hot tearing is solved and drop in temperature the process is in reducing atmosphere perhaps undertakes below inert atmosphere protection. This invention and existing technology photograph are compared, basically have the following and distinct effect: In modified process, the porosity that can change light qualitative firebrick scarcely and fireproof degree, but its compressive strength can raise 50 ～ 150 ％ . And have technology simple, easy adjustment and control, but repeatability is good with cost low good point. 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.
Get Price
WhatsApp