METHOD OF CALCINATION OF MINERAL RAW MATERIAL-LIMESTONE Russian patent published in 1994 - IPC

FIELD: calcination of lump or granular materials, can also be used in chemical industry, building materials industry, metallurgy and in other branches of industry. SUBSTANCE: at a change of the fractional composition the height of the firing zone is adjusted without a shutdown of the furnace. Adjustment of the height of the firing zone is accomplished by reversal of the height of the rarefaction zone upward for a coarse-fraction material and downward - for a fine-fraction material. EFFECT: stabilized calcination conditions at a variable grain composition of raw material without worsening of product quality. 3 dwg