FIELD: building materials production. SUBSTANCE: material is affected by heat treatment at 1150-1350 C, then 25-50 % of said material are removed of the process and are mixed with fluid material. Thus dehydration and granulation of fluid material takes place. Residue (75-50 %) of treated material is fed to the second step of roasting which is followed by cooling. EFFECT: intensifies drying process. 1 dwg, 2 tbl
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