Introduction

At present, the Chinese lightweight expanded clay aggregate production line tends to adopt the industrial rotary kiln. The cylindrical main kiln is placed on the idler pulley with the horizontal dip angle of 3degree. Materials enter the kiln from the upper end and then fall to the bottom end of the kiln which is rotating. Meanwhile, at the kiln head, the high pressure draught fan sprays the cola powder or the natural gas to the kiln and then burns it completely. The heat makes materials experience physical and chemical changes. They swell and then are cooled to finished ceramsite.