Belgorkhimporm, Soligorsk, Belarus:

M. R. Turko, Head of Laboratory, Candidate of Engineering Sciences, tela7@bk.ru
L. A. Soloviova, Senior Researcher

Belaruskali, Soligorsk, Belarus:
A. D. Lyubushchenko, Deputy Chief Engineer of Technology
E. A. Bashkardina, Chief Process Engineer of Mine Management 2

One of the priority directions to increase the fertilizers production efficiency is the introduction of the new effective ways of potassium beneficiation and also the development and introduction of technologies to process low-grade raw materials. Now, as a source of raw materials for the potash productions, it is planned to mine the deposits with a complex mineral composition, which were earlier considered as non-commercial – with the increased content of insoluble residue (i.r.) and magnesium chloride (MgCl₂). The literature analysis results on the infl uence of the increased content of magnesium chloride in the saturated salt solutions and their high temperature (>30 °C) on sylvine flotation from potash ores were used in the dressability study of the Petrikov deposit potash ore. Using four technological samples of the Petrikov deposit ore with MgCl₂ mass fraction of 1.6% and 2%, a set of experimental studies was carried out in order to investigate the ore dressability in saturated salt solutions of normal, increased and high temperatures of 23 °C, 32 °C and 38 °C, respectively. It is found that the increase in MgCl₂ content of ore from 1.6% to 2% and in the temperature of the saturated salt solution (up to 38 °C) leads to the essential decrease of the key technological indicators of flotation, even at the higher consumption of reagents. The reagent regimes to carry out floatation of sylvine from ore with MgCl₂ mass fraction of 1.6% and 2% under different temperatures were worked out and recommended. The research results on dressability of core samples were the basis for the development of processing flow chart for silvinite ore of the Petrikov deposit with a mass fraction of KCl 24% and MgCl₂ no more than 1.6% at the recovery of 87.5%.

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