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Date submitted2022-06-17
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Date accepted2022-10-18
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Date published2022-11-03
Scientific experimental bases for dry beneficiation of mineral ores
The article presents the results of research on the development of processes and equipment for ore preparation and pneumatic dry beneficiation of mineral ores. The methods of crushing and grinding before enrichment of minerals have been considered, dry enrichment of geomaterials is investigated. Highly efficient prototypes of beneficiation equipment are developed and tested: crushers of multiple dynamic impact RD-MDV-900, DKD-300, centrifugal grinders CMVU-800 and VCI-12, pneumatic separator POS-2000. Fundamental designs are created, and a number of new ore preparation and pneumatic beneficiation instruments are being designed. The efficiency of approbation of an autonomous dry beneficiation complex with new safe environmental standards for the processing of gold-bearing ores, which makes it possible to fully release and extract free gold with a particle size from 10,000 to 100 µm, is shown. The introduction of the dry beneficiation method is very promising for the mining industry. It will allow to reduce capital costs for the construction of stationary beneficiation plants, completely or partially withdraw from the use of process water, the construction of a water supply system, a traditional tailing dam, etc.
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Date submitted2009-08-05
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Date accepted2009-10-21
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Date published2010-02-01
The autoresonant electric drive of the swinging movement pendular vibration exciter vibration jaw crushers
- Authors:
- Yu. A. Gavrilov
- E. A. Zagrivnyi
To use of the autoresonant electric drive of swinging movement for creation of an oscillative motion of crushing jaws of vibrating jaw crushers it is offered in this article. The control system of the electric drive is developed. The results of imitating and physical modelling of the autoresonant electric drive are presented.
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Date submitted2009-08-16
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Date accepted2009-10-16
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Date published2010-02-01
Experimental determination of vibration jaw crusher perfomance and characteristic of the crusher two-motor drive in no-load and nominal mode of operation
- Authors:
- S. Yu. Tyagushev
- O. B. Shonin
The paper is devoted to the experimental study of jaw crusher characteristics under condition that nonidentity of subsystems electro-mechanical parameters causes the distortion of the nominal mode of the jaw crusher operation. Experimental data obtained have confirmed basic statements of a self-synchronization theory. The initial phase shift of jaws oscillations is shown to result in a substantial decrease in the crusher productivity and a significant increase in the specific power consumption.