►Rotary Kiln Introduction:
Rotary kiln refers to rotating calcination kiln, belongs to construction material equipment. According to the different materials, the kiln can be divided into cement kiln, metallurgy chemical kiln and lime kiln. The cement kiln is mainly used for the calcinations of cement clinker, and it has two types of dry and wet methods. And the metallurgy chemical kiln is mainly applied in metallurgy industries, like, magnetizing roast of the poor iron ore in ironworks, oxidizing roast of the chromium and nickel ore, roast of the high aluminum bauxite in refractory material industry, roast of clinker and aluminum hydroxide in aluminum manufacturer, and roast of the chromium ore and chromium powder in chemical industry. The lime kiln is mainly used for roasting the active lime and light roasting of the dolomite in ironworks and ferroalloy works.
►Working Principle:
The rotary kiln barrel is made of rolled steel plates with firebricks mounted in the inner side of the barrel.At an angle of 3.5% with the horizontal line,it is supported by three belting leathers on three supporting devices,with a big ring gear fixed in barrel body.The turn of the barrel is made through motor--speed reducer--pinion as well as the teeth joining of gearwheel and pinion.
Materials enter the end of the rotary kiln(the high part of the barrel).Because of the slant of the barrel and the slow turn,the materials turn around a circle on one hand and move toward the lower end on the other hand,being burnt into clinker by preheat decomposition,burning ,cooling and other peocess engineering,let out through the lower end of the barrel and go into the cooling machine.
The fuel is sprayed into the kiln by the spray coal device of the kiln head.The exhaust gas after burn is blowed out by air-exhausting machine of the kiln end and go into the atmosphere through the chimney after heat exchange with materials.