METHOD FOR EVALUATION OF COAL SLACKING DEGREE, METHOD FOR EVALUATION OF SET COAL DEGREE, METHOD TO CONTROL DEGREE OF COAL SLACKING AND METHOD FOR COKE PRODUCTION Russian patent published in 2017 - IPC G01N33/22 C10B57/04 

FIELD: oil and gas industry.

SUBSTANCE: method to control coal slaking degree includes preliminary determination of surface tension of each semi-coke grade obtained by heat treatment of each of several coal grades at the coal stock, and preliminary evaluation of each of several grades of coal portion at the coal stock; and blending several grades of semi-coke in appropriate ratio to produce mixture of semi-coke, at that the slacking degree of each of several grades of coal is controlled so that the value of surface tension at the boundary of semi-coke mixture phases γ_inter is determined, which is obtained from surface stresses and ratios of each of several grades of semi-coke and totals 0.03 mN/m or lower. Other variants of the abovementioned method and method for coke production with an application of any of the variants of the method to control degree of coal slacking are also provided.

EFFECT: increased control accuracy and reliability.

4 cl, 2 ex, 5 tbl, 4 dwg