... chemical materials 3.Reliable and easy operation Roller Rotary Kiln1. USAGERoller rotary kiln is mainly used for magnesium oxide, calcium ... reduction, drying, decomposition, calcination, etc.. The roller rotary kiln lining is pure fiber structure. The roller uses high ... or silicon nitride ceramic). The roller rotary kiln uses frequency motor or adjustable speed motor to drive, and maximum temperature ...