Silicon not the brick is used at where, have what production technology

Silicon Mo Zhuanzhuan is Al2O3-SiO2-SiC fastens fireproof material, commonly used at cement kiln.

Produce craft raw material: Use tall aluminous alumina to make raw material, add Bai Gangyu, inferior pink of stone of line of corundum of Bai Gangyu, palm, silicon, andalusite, clay (earth of Guangxi white mud, Suzhou) , pink of Si of pink of stone of silicon small pink, candle, metal and Al pink, unripe tall; Craft parameter: The density of goods and intensity rise, when carborundum joins quantity 15%-20% , each target is better. When carborundum fine pink exceeds 20% , the intensity change of goods is not big, heatproof shake sex has the tendency that drop. Carborundum grain is too thick, not quite remarkable to the influence of goods function, it is better that because this should be mixed with grain,fine pink is joined at the same time. Mix refine: Pug is in forced refine is mixed in blender, have experiment of order of feed in raw material and test of the time that mix refine early or late. Mix raw material doing above all, add bond next (liquid) , mix refine 15min again. Make bricky technology: Choose aluminous grog to make aggregate, choose the carborundum grain of SiC≥90% and fine pink at the same time, add pink of Si of corundum or andalusite, metal and Al pink and bond burden appropriately, use grading of 6 class grain, in forced 15min mixes on blender, use 400t Reach 630t to press bricky machine to shape, punch 6-8 second. Dry with agglomeration: The temperature that adobe controls in 100 ℃ issues dry 24h, loading of kiln is firing. Firing temperature is 1330 ℃ , 1350 ℃ , 1390 ℃ , 1420 ℃ , 1440 ℃ , 1450 ℃ , 1500 ℃ respectively, the goods with 1390-1440 firing ℃ each target is better. Be in after adobe is dry in channel kiln after 1430-1440 ℃ is firing heat preservation 8-10h. Silicon not it is very important also that the brick makes density of accumulation of grain of bricky raw material. Grain accumulation is close together, air hole is little and small, the gas of infiltration is little, also can reduce oxidation, can get a structure at the same time the products with compact, high intensity. The Fe2O3 content of raw material and broken smash the main factor that the mechanical Fe that takes also is influence SiC oxidation, reaction is as follows: SiC+Fe2O3+O2=Fe2SiO4+CO 　 uses clay to add the product of organic bond, lean firing temperature makes goods agglomeration compact. Use chemical bond, if phosphate is in 250 ℃ of 42.5 ～ anxious phosphate of dehydration translate into, turn into by lively condition to 265 ℃ dead condition, farther dehydrate translate into slants inside limits of ℃ of 250 ～ 450 phosphate, in 320 ～ cementation is formed when 430 ℃ , in 400 ～ 500 ℃ can achieve very high bonding strength. Heat phosphate and anxious phosphate slant to begin to decompose when temperature exceeds 700 ℃ for phosphate (Al2O3 · P2O5) , p2O5 begins gradually sublimate, when exceeding 1 100 ℃ , p2O5 volatilizes very fast, as temperature rise, will produce aggregate, much condensation polymerization to close, and the action such as cementation conglutinate, form union of pottery and porcelain at the same time, make goods obtains intensity and high temperature capability. Because of the goods of this chemically bond, inferior and firing the product that temperature can acquire high strenth, high density. Silicon not the brick is used at where cement rotary kiln a lot of place use silicon almost not brick, besides firing belt.