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Дата издания
30.04.2023Область исследования
Тип исследования
Аннотация (краткое описание)
During the processing of chromium ores, chromite concentrate is obtained for the production of ferrochrome, and waste is also collected -tailings beneficiation. Fragment and sludge tailings depending on the beneficiation technology.Finely dispersed sludge tailings of the Donskoy MPP of Kazchrome JSC are stored at the Dubersay and Akzhar tailings, which are man-made deposits (MMD) or man-made mineral formations (MMF). To develop a technology for processing sludge tailings, which contain up to 30% chromium oxide, their physical and chemical studies were carried out. According to the chemical analysis of sludge tailings, it follows that research should be directed to the removal of magnesium and siliconoxides, thereby increasing the content of chromium oxide to a standard chromium concentrate. A very thin dissemination of chromite with minerals of host rocks necessitates additional grinding of intermediate products, which are intergrowths of chromite with waste rock. Accordingto the results of fractional analysis and IR spectroscopy, the content of a large numberof flocculants in the studied sludge tailings and a large number of particles with a particle size of less than 20μm, which, in heavy liquid solutions, due to its small size, is in suspension and does not stratify, was revealed. According to the granulometric composition, it was determined that the sludge minus 0.071mm must also be classified into 0.04 and 0.02mm and enriched each class separately. It has been established that in order to obtain high technological performance, the traditional gravitational beneficiation scheme used at the DMPP is technologically cumbersome, because includes operations of flocculant disintegration, classifica-tion, grinding, beneficiation on concentration tables of each size class, regrinding of intermediate products. The results of the physicochemical study of chromium sludge tailings showed the need for a combined beneficiation scheme, including chemical enrichment with finishing of chromium concentrate by gravity beneficiation.DOI
https://doi.org/10.51301/ejsu.2023.i2.01Тип публикаций
Сведения о финансировании
The research was conducted with the financial support of the Committee of Science of the Ministry of Science and Higher Education of the Republic of Kazakhstan under grant No. AP09259594.Данный документ располагается в коллекциях
Научные издания SU
Engineering Journal of Satbayev University