Abstract
Processing of potash production slime storage lyes with the aim to obtain useful components with evaporation method was investigated. It was estimated that during the first and the second stages of evaporation in vacuum crystallization devise (VCD) sodium chloride was crystallized from the hot (90-95 °C) lye, and potassium chloride - when cooling down to 35 °C. Content of basic components (KCl & NaCl) in the precipitate was more than 90 %. During the third stage, while cooling down to 20-25 °C, and the fourth stage from the hot (90-95 °C) lye, a mixture of sodium and potassium chlorides was crystallized. During the next evaporation and cooling up to 20-25 °C together with sodium and potassium chlorides, carnallite was obtained, the decomposition of which leads to potassium chloride formation.
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