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.

Inactive Publication Date: 2006-05-03
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
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  • Description
  • Claims
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Problems solved by technology

However, for the polyhalite ore buried in the deep part of the formation (hundreds of meters or even thousands of meters), the above-mentioned method cannot be adopted due to the inability to realize ground operating conditions such as roasting and crushing.
Therefore, the deeply buried polyhalite ore has not been developed and utilized so far, and has always been regarded as a "dull mine".

Method used

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  • Potassium leach-out exploitation method from mamanite ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] In this example, the simulation experiment was carried out with Nongle polyhalite in Quxian County, Sichuan Province, and the K content in the ore was 14.8%. with 5% CaCl 2 Solution 2500ml is leaching and leaching 250g polyhalite, the ore particle size is 2mm, the percolation speed is 0.75m / d, the percolation column is Φ25mm×h400mm (the height of the sample is 300mm), and the obtained leachate is 2300ml, of which K + Concentration of 13.45g / l,, K + The leaching rate was 82.5%.

Embodiment 2

[0025] In this example, the simulation experiment is still carried out with Nongle polyhalite in Quxian County, Sichuan Province, and the K content in the ore is 15.15%. with 5% CaCl 2 Solution 1600ml is leached to extract 150g of polyhalite, the particle size of the ore sample is 5mm, the percolation speed is 0.55m / d, the percolation column is Φ25mm×h400mm (the height of the sample is 250mm), and the obtained leachate is 1420ml, of which K + Concentration of 13.05g / l,, K + The leaching rate is 81.55%.

Embodiment 3

[0027] In this example, the polyhalite in Dawenkou, Shandong Province was used for the simulation experiment, and the K content in the ore was 10.8%. with 5% CaCl 2 200g of polyhalite was obtained by leaching and leaching 2000ml of the solution, the ore particle size was 2mm, the percolation speed was 0.75m / d, the percolation column was Φ25mm×h400mm (the height of the sample was 300mm), and the resulting leachate was 1850ml, of which K + Concentration of 9.45g / l,, K + The leaching rate was 80.9%.

[0028] Example 3

[0029] In this example, the polyhalite in Dawenkou, Shandong Province was used for the simulation experiment, and the K content in the ore was 10.8%. with 5% CaCl 2 2500ml of the solution is leached to extract 200g of polyhalite, the ore particle size is 8mm, the percolation speed is 0.5m / d, the percolation column is Φ25mm×h400mm (the height of the sample is 300mm), and the obtained leachate is 2250ml, of which K + Concentration of 6.45g / l,, K + The leaching...

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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%.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/06C22B26/10
CPCY02P10/20
Inventor 安莲英殷辉安唐明林
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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