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For 63 samples of Ukrainian, Russian, and imported coal, equations for predicting the gross calorific value Q
on the basis of the following coal characteristics are developed: W
, and Car. The error is within the standard tolerances (σ ≤ 0.3 MJ/kg)....
With a view to finding new reagents for preventing the freezing of coal in winter, the acetates of sodium, potassium, calcium, and magnesium are studied, as well as a mixture of calcium and magnesium acetate. Attention focuses on their physicochemical characteristics, methods of preparation and...
The integral ignition characteristics of a single droplet (initial radius 0.3–1.0 mm) of various organic coal–water fuels (prepared by means of a homogenizer or a ball mill) in an oxidant flux at 800–1100 K are compared. The fuel samples are based on spent motor, turbine, and transformer oils,...
The semicoking of residual humin from Berezovsk lignite is investigated, with and without additions of modifier. The maximum semicoke yield is observed at 450°C after 0.25 h. Converted for absolutely dry semicoke, it is 64–66%, regardless of the moisture content of the humin. The 11% increase in...
The relation between the properties, composition, and structure of pitch and its modification on carbonization is considered. The basic stages in carbonization are determined, and a step-by-step carbonization model is proposed on the basis of thermal analysis and data regarding the changes in...
The equilibrium distribution of quinoline, isoquinoline, and quinaldine between aqueous solutions and KU-2-4 and KU-2-8 sulfonic-acid ionites of polystyrene type (counterparts of Dowex 50 × 4 and 50 × 8 ion-exchange resins) in the form of copper and iron cations is considered. The distribution...
Two promising catalysts are tested in the desulfurization of coke-oven gas at OAO Magnitogorskii Metallurgicheskii Kombinat in a pilot plant (with a gas flow rate of up to 0.78 m3/h): AOK-78-57 titaniumoxide catalyst (produced by OOO Katalizator, Novosibirsk); and VA-2 vanadium catalyst on an...
The capacitive compensation of reactive power in the presence of harmonic distortion in the supply voltage is considered. Such distortion may be introduced both by factors in the external grid and by factors within the enterprise. That must be taken into account in selecting systems for reducing...
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