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Buevich V.V.,VNII Galurgy Stock Co. | Chekmasov N.V.,Perm National Research Polytechnic Institute | Shishlyannikov D.I.,Perm National Research Polytechnic Institute | Gabov V.V.,National mineral resources University Gornyi
Gornyi Zhurnal | Year: 2016

There is reviewed the destruction process of potash massif by cutters of planetary-disk effectors of heading-and-winning machines "Ural". There are described the main advantages and disadvantages of spatial planetary-disk effectors of up-to-date mining machines. It is pointed out that instability of cutting parameters - cutter spacing and depth of cut - cause high energy consumption and large amount of the fine non-benificated ore fractions (waste of the mining operations) in the breaking products during the potash massif destruction by the cutters of effectors of the heading-and-winning machines "Ural". There are proposed the method and constructions of perspective planetary-disk effectors of heading-and-winning machines, which are effected potash massif destruction by crossing cuts. The results of experimental researches show that usage of cross configuration cutting for potassium salts, compared with traditional cutting configurations, allows to decrease specific energy consumption of destruction process of potash massif more than 20-25% and to decrease amount of fine non-benificated ore fractions in the freed ore more than by 2 times. There are proved technical decisions for upgrading of screw effectors of the heading-and-winning machines "Ural". It is pointed out that the change of single-start screw for two-start screw will provide more uniform feed of mined rock on the conveyor of machine, reduction of its circulation and energy consumption for ore regrinding. Work scope expansion of machines "Ural" without caterpillar slip is possible while changing of rotation direction of breaking equipment in the opposite (from sole to the hanging side), in so doing mine face reaction forces on cutters will have directions, at which machine penetration force (power crowding) is decreased and application force of caterpillars to the sole is increased.


Polezhaev S.Y.,National Mineral Resources University Gornyi | Cheremisina O.V.,National Mineral Resources University Gornyi
Russian Journal of Non-Ferrous Metals | Year: 2015

The object of investigation is an autoclave cake of the refractory gold-containing flotation concentrate prepared using a pilot plant. The influence of heat treatment (HT) on the chemical composition and recovery of gold is investigated for this material in a temperature range of 100–500°C. Due to the HT, it is possible to acquire high recovery of gold up to 98%. This is attained due to deep removal during the HT of organic carbon, which passivated gold during the autoclave oxidation. Arsenic is situated in a stable nontoxic form of iron arsenate, which undergoes no variations in the content and remains in the cake at the HT stage throughout the temperature range under study. The possibility in principle to process the double refractory concentrate with the help of a complex technology of autoclave oxidation and subsequent HT is shown. © 2015, Allerton Press, Inc.


Telyakov A.N.,National Mineral Resources University Gornyi | Shmidt D.V.,National Mineral Resources University Gornyi | Petukhov A.A.,National Mineral Resources University Gornyi | Gavrilov G.M.,National Mineral Resources University Gornyi
Metallurgist | Year: 2014

A scheme is provided for testing and developing electronic scrap enrichment with the aim of extracting precious metals. © 2014, Springer Science+Business Media New York.


Sharikov Y.V.,National Mineral Resources University Gornyi | Markus A.A.,National Mineral Resources University Gornyi
Metallurgist | Year: 2014

A new design of lining for rotary kilns is described and is compared with existing linings. The thermal field of the lining is calculated for both cases by using the software Ansis 14.0 Fluent and AnsinICEM 14.0. A comparison is also made between the thermophysical characteristics of the new lining and existing linings and recommendations are given on the areas of application of the former. © 2014, Springer Science+Business Media New York.


Boguslavskii A.Yu.,National Mineral Resources University Gornyi | Telyakov A.N.,National Mineral Resources University Gornyi | Sizyakov V.M.,National Mineral Resources University Gornyi | Shmidt D.V.,National Mineral Resources University Gornyi
Metallurgist | Year: 2013

Combined processing of copper-silver and iron-nickel-cobalt concentrates selectively obtained from electronic scrap is studied. Substance composition is determined for melt products of this scarp and an order of sample selection is proposed for molten electronic scrap in order to perform chemical analysis of precious metals with the aim of simplifying financial calculations with secondary metal suppliers. © 2013 Springer Science+Business Media New York.


Konovalov G.V.,National Mineral Resources University Gornyi | Bazhin V.Yu.,National Mineral Resources University Gornyi | Nikolaev A.K.,National Mineral Resources University Gornyi
Metallurgist | Year: 2014

The efficiency with which the charge mixture in horizontal converters is blown with oxygen and air is examined. The study is a continuation of research that the National University of Mineral Resources has begun on changes to the design of the tuyere and the blowing method used in the conversion of coppernickel mattes. © 2014 Springer Science+Business Media New York.

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