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The New Type of Rotary Kiln

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18 jun 2012 - The New Type of Rotary Kiln

http://www.hx-china.com/19.html">Rotary kiln is also referred to rotate calcination kiln, belongs to construction material equipment. Rotary kiln can be pided into cement kiln, metallurgy chemical kiln and lime kiln according to different materials. Cement kiln is used for making of cement clinker and there are dry and wet methods to make cement. Metallurgy chemical kiln is used in metallurgy industry and ironworks for lean iron ore, chromium ore and ferronickel ore calcinations, which is used for calcining of high aluminum vandal ochre in refractory material industry; for calcining of calotte and aluminum hydroxide in aluminum manufacturer; for calcining of chrome sand ore and chrome powder ore in chemical plant. Lime kiln are used for calcine dolomite and active lime which is used in steel plant and ferroalloy factory.

Rotary kiln is a processing device, which is mainly used to raise materials to a high temperature in a continuous process, as the common saying ¨C calcinations. It is usually used with the material as follows: cement, lime, refractories, metakaolin, titanium dioxide, alumina, vermiculite, iron ore pellets, etc. According to different material, the rotary kiln can be divided into three types, cement kiln, metallurgy kiln and limestone kiln. The cement kiln is mainly used for calcimine of cement clinker; usually, it has two types ˇŞ wet and dry. The metallurgy kiln is used in metallurgy industry and ironworks, such as lean iron ore, chromium ore and ferronickel ore calcimine. The lime kiln, also named active lime kiln, is used for roasting the active lime which is used in steel works and ferroalloy works, and calcined dolomite.

The purpose of the refractory lining is to insulate the steel shell from the high temperatures inside the kiln, and to protect it from the corrosive properties of the process material. It may consist of refractory bricks or cast refractory concrete, or may be absent in zones of the kiln that are below around 250ˇăC. The refractory selected depends upon the temperature inside the kiln and the chemical nature of the material being processed. In some processes, such as cement, the refractory life is prolonged by maintaining a coating of the processed material on the refractory surface. The thickness of the lining is generally in the range 80 to 300 mm. A typical refractory will be capable of maintaining a temperature drop of 1000ˇăC or more between its hot and cold faces. The shell temperature needs to be maintained below around 350ˇăC in order to protect the steel from damage, and continuous infrared scanners are used to give early warning of ˇ®hot-spotsˇŻ indicative of refractory failure.

Henan Hongxing Mining Machinery Co., Ltd. manufactures various equipments for whole set of stone production line, and provide complete technical support for customers. The whole production line consists of stone crushing line, powder making line, sand making line and http://www.hx-china.com/36.html">ore beneficiation line. We design different production lines ranging 50 t/h to 500 t/h by combining different models of equipments also matching http://www.hxjq-crusher.com/2.html">cone crusher, deduster, etc. It is widely used for crushing hard limestone, granite, basalt, gravel, metallurgic slag, etc or artificial sand making for hydroelectric power, building material, high way, city construction, etc. Different models of equipments are combined to meet different customersˇŻ demands according to different craft requirements.

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