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The activities of coal companies in the Russian Donetsk Basin (Rostov oblast) are considered, as well as the basic coal characteristics, the potential value of local reserves, and the prospects for the region in current economic conditions.
The influence of ash content on the chemical composition of the ash is considered, along with the dependence of the Fe2O3, CaO, MgO, and SiO2 content in the ash of Kuznetsk and Donetsk coal on the yield of volatiles V
, which characterizes the degree of metamorphism. Correlation analysis...
A mathematical description of thermal stress in wet slaking is proposed. Calculations show that deeper cracks are formed in the coke layers directly exposed to the water supply than in lower layers. In large coke pieces, the crack depth may be a quarter of the radius. Water supply from below...
The fast and slow pyrolysis of lignite from the Kansko-Achinsk, Baganursk, and Tugrugnursk deposits is investigated. These semicokes are modified with various organic additives so as to change their porous structure and reactivity.
The ozonization products of regular and oxidized lignite, semicoke, and humic acids consist of a mixture of aliphatic monocarboxylic and dicarboxylic acids and aromatic polycarboxylic acids of the benzene, naphthalene, and phenanthrene series.
For ten isomeric dimethylnaphthalenes, the temperature dependence of the vapor pressure is estimated by the Riedel method. It is also represented by the Antoine equations with three numerical parameters for each isomer.
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