hgmie

Rotary kiln-Kehua Industrial

Raw materials are loaded in at the upper end of the rotary kiln and heated to about 2400° F. As the rotary kiln turns, the raw materials flow "downhill." Along the way ... As late as the early 1970s, in some parts of the country, concrete was being specified by the number of bags of cement in a cubic yard of concrete. By the mid ...