FIELD: industry of building materials. SUBSTANCE: invention relates to method for preparing clinker in rotating furnaces. Method for preparing Portland cement involves feeding the first flow of raw mixture from the cold end of rotating furnace with saturation coefficient 0.92-2.10 and the second flow of raw mixture from the hot end with melting point 1100-1250 C according that the second flow is added to zone of rotating furnace with temperature 1250-1450 C. The second flow of raw mixture is added in the amount 3-15% of mass of decarbonized material of the first flow. Invention provides reducing temperature in termination reaction of clinker formation by 50-70 C and heat consumption for clinker roasting by 10-15%. EFFECT: improved preparing method. 2 cl, 1 tbl
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