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The change in surface wettability of long-flame coal with little metamorphic development on first contact with air is analyzed. The wetting liquids considered are filtrates of cement suspensions of different concentrations, which are used to seal the external contour of mine workings. Wetting by...
For long-flame coal, the content of the basic elements in the organic mass (carbon, hydrogen, nitrogen, sulfur, and oxygen) is determined. Standard chemical methods are employed: accelerated determination of carbon and hydrogen; the Kjeldahl method for nitrogen; and the Eschka method for total...
The probability of reactions in the coke-battery lining on the oven side is assessed. The temperature ranges corresponding to such reactions are determined. The reaction products that are thermodynamically possible are iron oxides (FeO, Fe3O4), carbon monoxide and dioxide (CO, CO2), elemental...
The influence of four factors—the reagent consumption, the pulp density, the content of fine slurry in the coal pulp, and the flotation time—on the flotation of coal fines at MMK-Ugol is studied by means of a full factorial experiment. First-order regression equations are obtained by simulation;...
The adhesion of 28 minerals with highway-grade bitumen is assessed, in terms of the surface area of the mineral (%) still coated with bitumen after boiling in water. With increase in the total content of CaO, MgO, Fe2O3, and Al2O3, the adhesion of bitumen to the minerals increases, whereas the...
With the large-scale blast furnace and the wide application of oxygen enriched coal injection technology, the coke quality and its deterioration mechanism in the blast furnace are receiving significant attention in recent. By means of the characterization techniques such as chemical analysis,...
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