In the process of calcination by vertical shaft kilns, the raw material is loaded from the top of kiln together with coal powder and combustion improver, the fire of calcination comes from kiln bottom and temperature of about 1300 – 1400 deg C is achieved in the kiln. #calcinationofbauxiteinindustries #calcinationofbauxite #bauxitecalcination Read more at https://www.chanderpur.com/calcination-of-bauxite-in-industries.php