Isolation of iron in iron-containing pro duct from ash from burning of Ecibastuz coal
Dosmukhamedov N.K. Kaplan V.A. Zholdasbay E.E. Daruesh G.S. Argyn A.A.
2021Ugol Journal Edition, LLC
Ugol
2021Issue 156 - 61 pp.
This work is an extension of the boundaries of a new technology for the integrated processing of ash to produce highly pure aluminum and silicon oxides with the release of rare and rare-earth metals into a marketable product suitable for their further extraction. According to the developed technology, the quality of the products obtained is largely determined by the presence of impurities in them, in particular, the iron content. It seems efficient to allocate iron in the form of an iron-containing commercial product at the beginning of the technological scheme, which will greatly simplify the technology, reduce material costs and improve the quality of the products obtained. The paper shows the fundamental possibility of the separation of iron into an iron-containing product from ash from the burning of Ekibastuz coal by magnetic separation. Based on comprehensive studies, including the study of the material composition of the initial ash and magnetic separation products, it was found that magnetic separation of the ash results in an iron-containing product with a high iron content of up to 50%. A high up to 80% recovery of iron in a commercial iron-containing product is shown. Based on the results of the elemental, phase, and rational composition of the magnetic ash separation products, the material balance of the process is calculated. The residual minimum limit of the iron content in the non-magnetic fraction (1.2%) was established. Further processing of such material will significantly improve the technological parameters of the ash processing technology and the quality of the resulting commercial products aluminum and silica oxides.
Ash , Distribution , Iron , Iron-containing product , Magnetic separation , Material composition , Recovery
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Satbayev University, Almaty, 050013, Kazakhstan
Weizmann Institute of Science, Rehovot, 7610001, Israel
Satbayev University
Weizmann Institute of Science
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