Ecologically closed energymetallurgical technology of powdered iron ore and coal-cleaning wastes processing
| Autor: | P. A. Sechenov, A. A. Olennikov, V. I. Kozhemyachenko, I. A. Rybenko, E. V. Protopopov, V. P. Tsymbal |
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| Rok vydání: | 2019 |
| Předmět: | |
| Zdroj: | Ferrous Metallurgy. Bulletin of Scientific , Technical and Economic Information. 75:507-513 |
| ISSN: | 2619-0753 0135-5910 |
| DOI: | 10.32339/0135-5910-2019-4-507-513 |
| Popis: | The problem of coal-cleaning wastes utilization is actual in many countries of the world. At present in Russia these wastes are used only at 10–15% in different industries, but the potential of their utilization is much wider. Peculiarities of waste-less technology of powdered coal-cleaning wastes gasification in the slag suspended layer considered, resulted in conditional synthesis gas obtaining with simultaneous reducing and isolation of metal from ash and slag. Besides, another result was obtaining a highporous alumina-silicate slag (microspheres), applicable as a light filler for paints and coatings with low heat conductivity, as well as absorbing agent etc. It was shown, that based on the earlier elaborated jet-emulsion facility, a waste-less technology of gasification (processing) of coal and its cleaning wastes can be created resulting in obtaining three liquid products: synthesis gas (or electric power), alumina-silicate micro granules and iron with dissolved in it rare metals. Apart from the wastes of coal-cleaning availability, the presence of powdered iron-containing wastes (dust from gas-cleaning systems, iron ore concentration tails) can increase the efficiency of the technology. The increase will take place due to stable gas-slag emulsion support and the two-phase flow in the connection channels, as well as decrease of gaseous oxygen consumption at the expense of it substitution by oxygen of iron oxides. |
| Databáze: | OpenAIRE |
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