subject: How Much Do You Know About The Rotary Kiln [print this page] Cement rotary kiln is mainly used for burning cement clinker, which includes dry type cement production rotary kiln and wet type cement production rotary kiln. In steel metallurgy industry, metallurgy chemical kiln is mainly used for plant lean iron ore magnetizing roast, chromium, nickel-iron-oxidizing roasting, high bauxite ore roasting in refractory materials plant, etc. Lime kiln (active lime kiln) is used to roast active lime and light-burned dolomite in steel factories and Ferroalloy plants.
Among many production industries such as building material, metallurgy, chemical industry environmental protection, the widely used turning circle equipment which process solid material with mechanical, physical or chemical is called rotary kiln.
According to the exterior, rotary kiln can be pided into altered diameter rotary kiln and drift diameter rotary kiln; according to the usage, it can be pided into cement rotary kiln, clay-grain rotary kiln, kaoline rotary kiln, lime rotary kiln; according to energy supply, it can be pided into gas rotary kiln, Coal-fired rotary kiln and Mixed fuel rotary kiln.
We will introduce you wet rotary kiln processing and make some analysis. Generally wet rotary kiln body is slightly longer (length rate is 30-40). In order to increase heat transmission scale, we usually add chains at the kiln tail part to accelerate water evaporation. During wet rotary kiln production, we add water into raw material mill, and make it as slurry material with water content 30%-40%. After mixed completely, the standard slurry is sent into kiln for burning, after which it becomes clinker. The clinker out of kiln will be sent into cooling machine for cooling, and then sent to clinker store. Raw coal drying heat and coal powder burning heat will be used as heat source for clinker burning.
At present, there are two types shaft kilns used in domestic: common shaft kiln and mechanical shaft kiln.
Common shaft kiln is manual work for feeding material and discharging materials. Mechanical shaft kiln is mechanical work and successive operation. So, its output and quality and efficiency is better than common shaft kiln. According to building material technology policy requirements, instead of common shaft kiln, many small cement production plants apply mechanical shaft kiln to cement production.
Technological features:
New type of Hongxing metallurgy rotary kiln is featured with simple structure, reliable and convenient operation, less wear parts, high rotating speed, and high quality product.
1.The machine is automatic welded by high quality carbon killed steel and alloy steel plate.
2.Tyre, wheel, and open-type gear are made use of alloy cast steel.
3.Sliding bearing adopts large clearances no scratch pad bearing.
4.Transmission device uses hard tooth surface reducer, elastic diaphragm coupling, and it is driven by DC motor;
5.It uses hydraulic blocking-wheel.
6.It uses laminated pressure plate and cylinder tight pressure to seal the head and end of the kiln respectively;
7.There is a slow driving device.
As to the application of rotary kiln, the cement industry owns the most numerous rotary kilns in production. The whole cement process flow can be generalized as Two Whet A Burn. A burn refers to the process flow that calcining grinded raw materials to clinker under the high temperature of rotary kiln. So, rotary kiln is the host machine in cement production, it usually called as the heart of cement plant.
During ore beneficiation, rotary kiln can be used to magnetic roasting to the poor iron ore, which can change the weak magnetism into strong magnetism, so that it can be easy in magnetic separation. For Environment Protection, it has a history for 20 years that the developed countries use cement kiln to calcine hazardous wastes and rubbish. This method can not only make the waste become less and harmless, but also can make waste as the fuel, which can save coal powder and realize the Recycling of waste.
