FIELD: chemistry.
SUBSTANCE: method of correcting the composition of alite portland cement clinker based on a high-sulphate crude mixture consisting of carbonate rock, clay, gypsum and correction additives includes drying the components, analysing chemical composition thereof, calculating the composition of the crude mixture, blending, mixed-grinding the components, homogenising, calcining, firing the crude mixture to clinker and grinding with process additives; for content of SO3 in the crude mixture higher than 2.0%, composition of the crude mixture is calculated in two steps; at the first step calculation is carried out for formation of calcium monoaluminate CA in the clinker at saturation coefficient KN=1 and saturation rate CN=0 or CN=1, and at the second step calculation is carried out based on a crude mixture whose components are clinker obtained at the first calculation step without taking into account SO3, and correction additives, wherein calculation is carried out to obtain alite portland cement clinker containing C3S, C2S and C4AF at saturation coefficients KN=0.92-0.98, alumina modulus p=1.7-4.0 and silica modulus n=2.0-3.0, and when blending the crude mixture, its composition is corrected by reducing the amount of calculated clay from 4.0% to 20% and adding correction additives from 4.0% to 23%. The invention is developed in subclaims.
EFFECT: correcting the composition of a high-sulphate crude mixture for producing portland cement clinker while preserving alite in the composition thereof.
4 cl, 4 dwg, 11 tbl
