2019-7-12

Tsypin E. F., Ovchinnikova T. Iu., Efremova T. A., Elizarov D. B. Technological aspects of ore preconcentration with X-ray fluorescence separation. Izvestiya vysshikh uchebnykh zavedenii. Gornyi zhurnal = News of the Higher Institutions. Mining Journal. 2019; 7: 101–112. DOI: 10.21440/0536-1028- 2019-7-101-112

Object and aim of research. By eliminating coarse tailings, preconcentration may increase the content of valuable components in ore at the input of the processing plant with or without throughput reduction. The output of preconcentration tailings therefore determines the reduction level of operating costs. Technological and economic benefit may be significant with high prime cost of deep processing; it is connected with the costs of power-consuming processes of crushing, grinding, dewatering, as well as for reagents and material.
Research aims to study main technological factors which influence the effectiveness of ore preconcentration with X-ray fluorescence separation.
Methodology. The present research uses technological calculation of preconcentration with X-ray fluorescence separation (XRFS) at various granulometric characteristics of Run-of-Mine Ore and crushed ore, inhomogeneity analysis of components content in a lump with material size variation, experimental research on the study of sorted classes number influence on the indicators of separation with the use of XRFS in preconcentration technologies.
Results and the scope of results. Technological indicators of preconcentration with X-ray fluorescence separation are calculated for various granulometric characteristics of ore which comes to concentration. The obtained data allow to recommend XRFS in maximum size. The influence is revealed of the number of the sorted sorted classes on the total yield of preconcentration tailings. Maximum size of the concentrated material should be taken into account when choosing the number of sorted classes. Research results may be applied when developing the technologies of mineral raw material preconcentration with X-ray fluorescence separation.
Summary. The effectiveness of ore separating system operation is largely determined by the quality of ore preparation by granulometric composition both at actual mining (drilling and blasting operations) and crushing-screening at ore separating systems. The proposed approach allows to quantitatively estimate the influence of the number of sorted classes on the effectiveness of preconcentration with X-ray fluorescence separation and explain the choice of the number and the boundaries of sorted classes sizes.

Key words: preconcentration; X-ray fluorescence separation; ore sorting system; technology; inhomogeneity in a lump; granulometric characteristics; the number of the sorted classes.

 

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Received 4 July 2019

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