Potassium extraction processing technology of a kind of low-sulfur potassium mixed salt

Abstract

The invention discloses a potassium-extracting and processing process for low-sulfur potassium mixed salt. The potassium-extracting and processing process comprises the following steps: (1) mixing andgrinding potassium mixed salt ores with C-point mother liquor, and adding fresh water or unsaturated mother liquor to stir to complete conversion after grinding the ores; (2) regulating converted orepulp by utilizing C-point mother liquor, and performing aeration flotation after adding a collecting agent 601 to regulate ore pulp; (3) performing solid-liquid separation on concentrate foam and tailings pulp; (4) regulating the tailings pulp by utilizing D-point mother liquor, and adding a collecting agent CA-806; (5) transferring the regulated ore pulp to a flotation machine to perform potassium chloride flotation through a flotation process of roughing, refining and scavenging, and returning refined middling and scavenged concentrate to roughing to form a flotation closed loop; and (6) performing solid-liquid separation on the refined foams and scavenged tailings, thereby obtaining potassium chloride flotation concentration and final tailings, performing a washing process on concentrate, and leading the final tailings to a tailings warehouse. The potassium-extracting and processing process is simple in process, is good in product quality and is high in resource utilization rate.

Description

technical field [0001] The invention relates to a processing technology for extracting potassium from a potassium mixed salt, in particular to a processing technology for simultaneously producing potassium sulfate and magnesium fertilizer and high-quality potassium chloride by using a potassium mixed salt containing kabeinite with a low sulfur-to-potassium ratio. Background technique [0002] Potassium-containing minerals mainly include potassium halite, carnallite, polyhalite, kobeinite, kobeinite and other potassium-magnesium mixed salts. Existing potassium mixed salt mines obtained by using sulfate-type salt lake brine through the tanning process of salt fields generally contain langbeinite, potassium chloride, epsom salt and sodium chloride. At present, scientific research workers have done a lot of research work on this kind of potassium mixed salt potassium extraction process. CN1696059A discloses a method for converting a single potassium mixed salt raw material into...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a kind of potassium mixed salt suitable for low-sulfur-potassium ratio and containing potassium langbeinite, which can finely recycle langbeinite and high-quality potassium chloride processing technology, and overcome the prior art When reclaiming langbeinite and potassium chloride simultaneously, the potassium chloride product grade is low, the shortcoming that recovery rate is low, by adopting D point (Na + 、K + , Mg 2+ / / Cl - , SO 4 2- —H 2 In the metastable phase diagram of O quinary water-salt system, carnallite, epsom salt, and potassium chloride are fully saturated) mother liquor replaces point C (Na + 、K + , Mg 2+ / / Cl - , SO 4 2- —H 2 (5) Potassium chloride, kaleinite, and epsom salt in the metastable phase diagram of the five-element water-salt system) mother liquor to produce high-quality potassium chloride products and increase K + Recovery rate, to achieve efficient recycling of resources

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