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The variation of the combustion rate in the course of fossil-fuel metamorphism from lignite to anthracite and to graphite is due to the relative rates of two opposing but interrelated processes: deoxidation, which raises the heat of combustion; and molecular transformation with increase in...
The proposed method of X-ray fluorescent analysis permits the determination of coal’s sulfur content, with satisfactory accuracy, on the basis of the selective excitation of sulfur by the X-ray fluorescence of calcium.
Experiments on the carbonization of coal show that high-energy fuel with satisfactory piece strength (≥8 MPa in compression) may be produced in the nonoxidative heating of 3B and D coal, with gradual increase in the furnace temperature from 300 to 600°C. Such fuel does not require briquetting.
The post-reaction strength of coke was studied at different reaction temperatures in CO2 and mixed gas atmospheres. The influence of solution loss conditions on post-reaction strength of coke, with different levels of reactivity, was studied in this paper.
Blast-furnace performance is dependent on the coke quality and, above all, its stability. The stability of coke properties is ensured by effective homogenization of the coal components on storage and on blending crushed coal to form the coking batch.
A critical review reveals extensive experimental data on the continuous production of nonmetallurgical coke. In view of the large reserves of poorly clinkering coal in Ukraine and the need to produce sufficient coke for consumers outside of the metallurgical industry, the expansion of such...
The relation between the specific surface and granulometric composition of various carbon materials may be expressed by a log-normal equation. This provides a reasonable reliably method for rapid assessment of the mean particle size in fine grinding. The results may be used as an additional...
The modification of coal tar by nitrous oxide is considered. Preliminary N2O treatment of the tar increases the yield of light distillate fractions and reduces the content of unsaturated indene compounds and polyaromatic hydrocarbons in the oils.
The gasification of wood chips in a steam-air blast is considered. The expected gas properties are calculated when using a steam-oxygen blast. The yield and composition of generator gas, the degree of steam decomposition, and the efficiency of gasification are determined. Applications are...
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