The Donskoy Ore Mining and Processing Industrial Complex chromite tailings retreatment technology development

Gazaleeva, G. I.; Shikhov, N. V.; Власов, И. А.; Shigaeva, V. N.

doi:10.17580/or.2017.02.03

Cited by 2 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The processing of slurry tailings from the Dubersay and Akzhar tailings storage facility is not sufficiently efficient, since the processing scheme includes a sequential classification scheme and beneficiation on screw separators, slurry concentration tables are used in the end of the scheme, and the flotation method of beneficiation is also experienced. The existing tailings concentration scheme is complex and does not consider the main principles of gravity concentration [11][12][13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Physical and chemical studies of finely-dispersed slurry tailings of the Donskoy Ore Mining and Processing Plant (DMPP) for chemical beneficiation to produce chromium concentrate

Tastanov,

Serzhanova,

Sadykov

et al. 2023

EJSU

View full text Add to dashboard Cite

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 silicon oxides, 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. According to the results of fractional analysis and IR spectroscopy, the content of a large number of flocculants in the studied sludge tailings and a large number of particles with a particle size of less than 20 μm, 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 0.071 mm must also be classified into 0.04 and 0.02 mm 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, classification, 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.

show abstract

Section: Introductionmentioning

confidence: 99%