Potassium leach-out exploitation method from mamanite ore

A mining method and polyhalite technology are applied in the direction of improving process efficiency, which can solve the problems of inability to achieve operating conditions and have not been developed and utilized, and achieve the effects of satisfactory development and utilization effect, wide applicability, and little impact on formation environment.
CN1766138AInactive Publication Date: 2006-05-03CHENGDU UNIVERSITY OF TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHENGDU UNIVERSITY OF TECHNOLOGY
Publication Date
2006-05-03
Estimated Expiration
Not applicable · inactive patent

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Abstract

The leach mining method for kalium in polyhalite comprises: after leaching treatment to broken ore, recovering leaching liquid contained Ca2+ and / or Ba2+, and / or at least one from CO32-, HCO3-, PO43-, HPO42-, and SiO32-, while preferring CaCl2 liquid. This method fits to deep buried ore and ground or superficial layer ore with extraction rate more than 80%.
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Description

technical field

[0001] The present invention relates to a method for leaching and mining ores, specifically a method for leaching and mining potassium in polyhalite ore, so that K existing in insoluble potash minerals + It is developed and utilized after being dissolved by chemical methods. The method can not only be used for in-situ leaching mining of polyhalite deeply buried underground, but also can be used for heap leaching treatment of surface or shallow polyhalite. Background technique

[0002] Polyhalite is an insoluble potassium mineral widely distributed in sulfate-type deposits, with the chemical formula K 2 SO 4 · MgSO 4 2CaSO 4 2H 2 O. For surface or shallow polyhalite, the ore is generally crushed, roasted, and then extracted with water or other solvents. + . Commonly used solvents may include inorganic acids such as nitric acid and sulfuric acid and / or inorganic salt solutions such as calcium nitrate, ammonium carbonate, and calcium hydroxide. But for ...

Claims

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