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Models are developed for spectral classes of GZh and Zh coal concentrates based on diffuse-reflection IR spectra, by independent modeling of class analogs. The spectral classes derived for such coal are shown to be clearly distinct. Individual models of spectral classes for samples of GZh and Zh...
The profuse generation of polymer waste around the world has prompted a search for adequate disposal methods. One option is combined coking (gasification) with coal. The combined processing of polymer waste and coal results in the formation of composites with high added value.
In the thermal oxidation of mixtures of moderate-temperature coal pitch and the anthracene fraction of coal tar, the influence of the batch composition and the oxidation conditions on the microstructure of the coke produced is investigated. The optimal parameters for the production of isotropic...
The oxidation of BND 50/70 bitumen in the presence of minerals is investigated by thermogravimetric analysis (TG) and differential scanning calorimetry (DSC). The minerals present are quartz, calcite, hornblende, oligoclase, orthoclase perthite, potassium–sodium feldspar, muscovite, and granite....
Electrode consumption is the most important characteristic of steel electrosmelting. In many countries, graphite electrodes are consumed at a mean rate of 5.5–5.7 kg/t of steel. At Ukrainian enterprises, the corresponding figures are 6–10 kg/t of steel. The performance of graphite electrodes is...
At oil refineries, furnaces account for much of the energy expenditure. Energy efficiency may be improved by means of an integrated system that contains a furnace and a unit for heating the incoming gas with energy recovered from the smokestack gases. By exergetic analysis and efficiency...
The low-temperature pyrolysis of wood briquets is investigated. A double-walled reactor permits indirect heat supply. In modeling the continuous production of semicoke from wood briquets, the process is divided into stages: preliminary heating (at 220°C, which corresponds to briquet production);...
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