How to choose refractory lining for rotary kiln?

The purpose of the refractory lining is to insulate the steel shell from the high temperatures inside the Rotary 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 rotary kiln that are below around 250C. The refractory selected depends upon the temperature inside the rotary kiln and the chemical nature of the material being processed. In some processes, such as Cement Kiln , the refractory life is prolonged by maintaining a coating of the processed material on the refractory surface. The thickness of the lining is hongxingly in the range 80 to 300 mm. A typical refractory will be capable of maintaining a temperature drop of 1000C or more between its hot and cold faces. The shell temperature needs to be maintained below around 350C in order to protect the steel from damage, and continuous infrared scanners are used to give early warning of 'hot-spots' indicative of refractory failure.

Rotary Kiln is Widely Used in the Ferrous Metallurgy Industry. In the process of Beneficiation, Rotary Kiln can be used for the magnetizing and roasting of lean iron which turns its previous weak magnetism to strong magnetism and is good for beneficiation. According to various types of the ore, there are different roasting methods for the magnetizing and roasting such as reduction roasting, oxidation roasting, reduction & oxidation roasting, and neutral roasting. The most used reducing agent and fuel types are gas and solid. One most important feature of the magnetizing and roasting kiln by the gas reducing agent and fuel is that many gas nozzles are distributed on the kiln and moves with it to add gas reducing agent and fuel to every section of the kiln. When using the solid reducing agent, the gas pipe and air pipe on the kiln can be removed to make it simple in structure.

At the present, Hongxing mining machinery has set up three state level machinery research institutes, and we also produce various kinds of high efficiency thickner, rotary kiln and free service for assembling various kinds of production line.
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