Yekaterinburg, Russia
Yekaterinburg, Russia

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Gazaleeva G.I.,JSC Uralmekhanobr | Mamonov S.V.,JSC Uralmekhanobr | Sladkov M.M.,JSC Sredneuralsky Copper Smelter | Kutepov A.V.,JSC Sredneuralsky Copper Smelter
Tsvetnye Metally | Year: 2016

Nowadays, accumulated volumes of Russian technogenic wastes in almost match the volume of mineral deposits, set on balance. The average level of industrial waste use in Russia makes up only 53%, while the percentage of production waste use as secondary raw materials does not exceed 11%. The percentage of industrial waste utilizing in Europe and in USA, makes up 85% and 95%, respectively. This article describes the classification of beneficiation methods for major technogenic raw materials of metallurgical industry. The offered beneficiation technology of slowly cooled slags of copper smelting production at Sredneuralsky Copper Smelter (UMMC-Holding) is an example of intensification of technogenic raw materials beneficiation processes. Research result is the significant increase of copper extraction from flowing slags at concentration plant. The study of the phase composition of slags shows the prospectivity of a slow slag cooling method due to recrystallization and transition of primary copper minerals to the secondary ones. The study of copper mineral release degree in flowing slags shows the mass fraction of released copper mineral grains in a flotation grade size of -0.071 mm, equal to 58.95%. Content of such grains with the same size in samples of slowly cooled slag is from 85.83% to 86.73%. The process flowsheet is given for the flotation size grade (-0.071 mm) and consists of three main, one scavenger and two recleaner flotation operations with aftergrinding of middling products. A reagent mode differed from a plant mode by decrease of slurry pH from 11-12 to 8-9. Industrial tests of an accumulated batch of slowly cooled slags at the Concentrating plant of Sredneuralsky Copper Smelter show the efficiency of such processing: extraction of copper into copper concentrate is increased by 15-19%, and decrease of copper content in tailings makes up 0.17%. The process figure effect enhancing is based on coarsening of valuable slag mineral grains and improving the phase analysis due to its slow cooling.

Dmitriev A.N.,RAS Institute of Metallurgy | Sheshukov O.Y.,RAS Institute of Metallurgy | Gazaleeva G.I.,JSC Uralmekhanobr | Chesnokov Y.A.,RAS Institute of Metallurgy | And 3 more authors.
Applied Mechanics and Materials | Year: 2014

The approach to solving the problem of processing iron ore raw materials of Tebinbulak titanomagnetite deposit (Uzbekistan) is offered. It can provide high-quality steel products. The two schemes of processing of Tebinbulak ore are shown. The choice between the proposed schemes of the Tebinbulak ore processing: variant of "blast furnace – converter" and variant of "metallization – electric smelting" should be made after thorough analysis based on many factors. © (2014) Trans Tech Publications, Switzerland.

Gazaleeva G.I.,JSC Uralmekhanobr | Bratygin E.V.,JSC Uralmekhanobr | Kurkov A.V.,All Russian Scientific Research Institute Of Mineral Resources Named After N M Fedorovsky | Rogozhin A.A.,JSC Uralmekhanobr
Obogashchenie Rud | Year: 2015

The paper presents a review of the criteria for choosing optimum ore preparation flow sheets. The authors analyzed the criteria for selectivity of crushing; a criterion, based on the results of optical microscopy - determination of valuable mineral liberation degree, is proposed. The final estimate of crushing process selectivity (selectivity criterion L0) is performed through calculation of the ratio between quantity of free grains of valuable mineral in given size fraction of crushed material and quantity of free grains of valuable mineral in given size fraction of feed, taking into consideration yield of the size fraction in question. In addition to that, estimate of a specific crushing apparatus optimality of application is performed preliminarily by maximum reduction ratio of material, which is determined by size distribution in feed and crushed products, however, priority is given to maximum selectivity criterion. Verification of the proposed criterion was accomplished by comparison of the Vishnevogorskoye deposit niobium-bearing ores crushing in inertia cone crusher and centrifugal impact crusher. Also, various operating regimes of the crushers were tested. Comparison of selectivity criterion L0 showed, with crushing in inertia cone crusher (ICC) its value is significantly higher, than in crushing in centrifugal impact crusher (CIC). For CIC crusher, criterion L0 is 0.82-0.87 units, while for ICC - 1.43-1.755 units. The most efficient operating regime for crusher ICC-300?, from viewpoint of providing the Vishnevogorskoye deposit niobium-bearing ores selectivity of crushing, is as follows: unbalanced mass slewing angle - 120°, rotary velocity of cone rotation - 23,67 s-1, specific power consumption - 6.99 kW/t.

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