News Date:2016-07-07 13:59:31
Refractoriness refers to the refractory conical body sample without load, the celsius temperature resistance to high temperature and not softening melting down. Refractory material is widely used in metallurgy, chemical industry, petroleum, machinery manufacturing, silicate, power and other industrial fields, most consumable in the metallurgical industry, accounts for 50%-60% of total output. Rotary kiln refractory materials is a kind of material used for rotary kiln lining, in general, the refractoriness of refractory materials is not less than 1580 ℃. Refractory brick in rotary kiln can protect general rotary kiln cylinder at the same time to prevent the corrosion of material for cylinder. Refractory brick is usually can be divided into several kinds of materials by making, such as: Corundum brick, direct-bonded magnesia-chrome bricks, carborundum brick, silicon nitride combined with carborundum brick, nitrides, silicides, sulfide, boride, carbide and other non oxide refractory materials, calcium oxide, chromium oxide, aluminum oxide, magnesium oxide, such as beryllium oxide refractory materials. Frequently used in rotary kiln is alumina refractory brick.
Rotary kiln equipment raw material into the kiln within certain gases or certain chemicals produced by the damage to the kiln lining is also relatively large. If kiln material is too much, it have to turn down preheater exhaust air, increase dosage of pulverized coal, strong force for fire to burn, make the calcining zone heat load increase rapidly, the thinning of the kiln, kiln lining refractory resistance severely damaged. When material too little in the stove, pulverized coal flame downdip obviously, fell on the thinner material layer, if not timely adjust the air flow and coal, easy to burnout skin and refractory brick kiln. The fuel nozzle structure often not received enough attention in the production, Nozzle shape and export size main influence degree of the mixture of pulverized coal at the same time the wind and the jet velocity, sometimes in order to strengthen the wind coal blending, but also equipped with wind wings in nozzle.
