How to Choose Refractory Materials for Rotary Kiln
The rotary kiln is divided into a discharge end, a cooling zone, a firing zone, and a preheating zone from the kiln head end. The temperature in each section of the kiln ranges from 1000°C to 1350°C, and the requirements for refractory materials are also different. Refractory materials not only withstand high-temperature impact, but also withstand material corrosion, wear, and stress generated by kiln rotation. Therefore, there are strict requirements not only for the physical and chemical indicators of refractory materials. 1. Rotary kiln discharge port and cooling zone Demand: Due to the joint action of high-temperature clinker, secondary air, and high-temperature flame, strong mechanical wear and chemical erosion are caused. Therefore, it is required to have good wear resistance, slag resistance, and thermal shock resistance. Selection: Generally, first-grade high alumina bricks, thermal shock-resistant high alumina bricks, spinel bricks, chrome magnesia bricks, phosphate bricks, etc. are used as high alumina bricks, Refractory concrete (corundum aggregate), and silicon carbide bricks. 2. Rotary kiln firing zone Purpose: The refractory layer fired in the rotary kiln is mainly subject to high-temperature impact and chemical corrosion (alkali corrosion). Therefore, magnesia bricks and chrome magnesia bricks should be selected as high-temperature refractory materials that are...
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