Cement kiln Academic Dictionaries and Encyclopedias
In the 1930s, significantly, in Germany, the first attempts were made to redesign the kiln system to minimize waste of fuel [K E Peray, "The Rotary Cement Kiln", CHS Press, 1998, ISBN, Chapter 2, Hewlett "op cit", pp 7377] . This led to two significant developments: * the grate preheater * the gassuspension preheater.