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Polyhalite mining method

A mining method and polyhalite technology, applied in the field of salt chemical industry, can solve the problems of mining difficulty, unsuitable mining method, huge equipment, etc., and achieve the effect of low mining cost

Inactive Publication Date: 2015-08-19
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The technical effect of this patented technology is that it uses an alkali metal hydroxides instead of expensive chemical agents for extracting polysaccharides from sea water sedimentary rocks like kelp bone ash. This reduces costs compared to traditional methods while still maintaining effective results.

Problems solved by technology

Technological Problem: Current Methods For Extraction Of Potash InPolybhlrite Mining Existing Solvable Ground Blasts/Fractured Fractures require expensive machining tools and complicated operations, while Leach can only work on shallower buried materials like Deep Sand Banks but may have issues involving excessive waste water disposal costs.

Method used

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  • Polyhalite mining method

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Embodiment Construction

[0014] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the specific embodiments set forth herein. Rather, the embodiments are provided to explain the principles of the invention and its practical application, thereby enabling others skilled in the art to understand the invention for various embodiments and with various modifications as are suited to particular intended uses.

[0015] The present invention provides a method for exploiting polyhalite by leaching, the method comprising the following steps: in step 110, injecting the leaching agent from the injection area of ​​the brine mining well or the brine mining channel, so that it is mixed with the polyhalite The halogen stone is contacted and leached for a predetermined time to obtain potassium-containing brine; in step 120, the potassium-conta...

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Abstract

The invention discloses a polyhalite mining method which comprises the following step: injecting a leaching agent from an injection region of a saline well or a saline channel into an ore bed, wherein the leaching agent is contacted and leached with polyhalite in the ore bed to a predetermined time to obtain potassium-containing brine; and the leaching agent comprises a sodium chloride solution, the mass concentration of which is from 20% to saturation concentration. According to the method disclosed by the invention, by taking the sodium chloride solution obtained from a salt field process as the leaching agent, polyhalite which is deeply buried within 200m in a salt lake region is mined by virtue of a height difference between the injection region and the saline region. Compared with the mining method of the polyhalite in the prior art, the method not only is relatively low in mining cost, but also avoids collapse of the ore bed caused by detonation, fracture and improper leaching and the like.

Description

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Claims

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Application Information

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Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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