A rotary kiln for calcination of light aggregate cement comprises a calcination kiln body, a heavy-oil combustion device, and a cooling device, wherein the calcination kiln body is formed in a U-turn for saving construction site and is composed of a feeding entrance at its upmost end, a product exit...http://www.google.com.au/patents/US6468074?utm_source=gb-gplus-sharePatent US6468074 - Rotary kiln for calcination of light aggregate cement
