OPTIMIZATION OF THE ENRICHMENT PROCESS OF CHELKAR DEPOSIT POTASSIUM ORE

The article discusses the results of studying the processing of washed potash ore from the Chelkar deposit to obtain ballastless potash fertilizer. The efficiency of ore double and triple washing from sodium salts has been studied to determine the optimal mode of ore enrichment on potassium. It has been established that it is expedient to carry out ore double washing with washing water, which ensures the maximum potassium content in the ore and the minimum content of sodium salts. The washing effectiveness is confirmed by the results of the X-ray analysis of the ore after double washing. Ore calcination leads to dehydration of crystalline hydrates of minerals and to increasing content of main components in its composition. Dissolution of the calcined ore at temperatures of 50 and 90°C results in only a partial transition of potassium and magnesium salts into the solution with the complete dissolution of residual amounts of sodium salts. To reach complete dissolution of potassium and magnesium sulfates, which are the target components for obtaining mineral fertilizers, it is necessary to study methods of chemical conversion.

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