Abstract
Dumps of a mining-metallurgical complex of post-Soviet Republics have accumulated a huge amount of technogenic waste products. Out of them, Kazakhstan alone has preserved about 20 billion tons. In the field of technogenic waste treatment, there is still no technical solution that leads it to be a profitable process. Recent global trends prompted scientists to focus on developing energy-saving and a highly efficient melting unit that can significantly reduce specific fuel consumption. This paper reports, the development of a new technological method—smelt layer of inversion phase. The introducing method is characterized by a combination of ideal stirring and ideal displacement regimes. Using the method of affine modelling, recalculation of pilot plant’s test results on industrial sample has been obtained. Experiments show that in comparison with bubbling and boiling layers of smelt, the degree of zinc recovery increases in the layer of inversion phase. That indicates the reduction of the possibility of new formation of zinc silicates and ferrites from recombined molecules of ZnO, SiO2, and Fe2O3. Calculations show that in industrial samples of the pilot plant, the consumption of natural gas has reduced approximately by two times in comparison with fuming-furnace. The specific fuel consumption has reduced by approximately four times in comparison with Waelz-kiln.
Highlights
Dumps of metallurgical enterprises of Kazakhstan have accumulated about 20 billion tons of technogenic waste products of mining-metallurgical complex, over the years
Permits were obtained from the Committee of Ecology and Sanitary-Epidemiological Service of Republic Kazakhstan
A pilot plant of melting unit of the new generation called reactor of inversion phase–rotary kiln (RIPh-RK) has been introduced and a series of experiments have been conducted to validate the efficiency of the proposed method
Summary
Dumps of metallurgical enterprises of Kazakhstan have accumulated about 20 billion tons of technogenic waste products of mining-metallurgical complex, over the years. As the reserves of rich polymetallic ores in the country will be sufficient only for 25–30 years [2], there is a noticeable trend in the last decade in producing precious metals from recoverable resources, technogenic wastes and pari passu from unconventional raw material sources. With such scientific interest arising, the treatment of waste products with energy-saving and less complex processing modes has become a significant and important scientific frontier in extracting valuable materials, at present
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