In the process of industrial corporation activities a lot of waste, which pollutes the atmosphere, is generated, for example ash and slag. In Tomsk region, by estimates, ash stores occupy about 600 hectares, which contain about 25 million tons by weight. In Russian thermal power-stations ash disposal areas there are about 1.3 billion tons of ash, and only 10% of it is used. That is why this problem is topical enough. In this paper the scheme of producing ash ceramic bricks and complex ash and slag waste processing is shown. Besides, profitability of the project is presented
The results of mineralogical studies of technogenic tungsten raw material (stale tailings of Bom-Gorhon deposit) are represented. Its particle size distribution as well as tungsten and accompanying element distribution among the fractions were determined. The necessity of grinding the heaps down to 0.2-0.25 mm in size was established. It allows increasing the recovery rate of two or more times in comparison with the traditional pattern of tailing processing
An autonomous electric stimulator (AIES) of the gastrointestinal tract (GIT) is used for restoring dysfunction of GIT motoric and evacuation activity and for some other purposes [1]. Because the AES can be also used for correcting the microelemerit balance of humans or animals, the electrochemical aspect of AES functioning is of particular interest.The AES body is a dielectric bushing with two hemispherical cap electrodes made of 12Kh18N9 stainless steel. The corrosion resistance and electrochemical polarization of stainless steel in 1% solution of hydrochloric acid and in natural GIT media (gastric juice and bile) were discussed in [3]. The specific shape and location of the AES electrodes result in a nonuniform distribution of electric current density and electrochcmical polarization potential over the electrode surface.The goal of the present work was to study experimentally the local electrochemical polarization of the AES electrodes, to consider the structure and parameters of a theoretical distributed model of AES that takes into account electric current spread over the electrolyte medium and nonuniform electrochemical polarization distribution over the cap-electrode surface. The development of an adequate mathematical model for optimizing electrochemical parameters of AES was also a goal of this work.
Mathematical ModelBecause the AES has axial symmetry, it is reasonable to form the AES mathematical model on a spherical or cylindrical frame of reference (Fig. 1).An element of the volume electrical conduction of the electrode is:where Y0 is the specific electric conduction; ds, dl are the area and length elements, respectively.In spherical coordinates the equation for the electric conduction elements in the radial and tangential (by angle v) directions is:In cylindrical coordinates:Integration of Eq. (1) for ~p over an interval from 0 to 2:r, for v with a step Av, and forp with a step Ap gives:Tomsk State Academy of Management Systems and Radioelectronics. Tomsk Polytechnical University.
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