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Mining method for polyhalite

A mining method, the technology of polyhalite, applied in the field of salt chemical industry, can solve the problems of ineffective mining of polyhalite, high cost, pollution, etc., and achieve the effect of solving the problem of oil field drainage

Inactive Publication Date: 2018-01-05
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, for the mining of polyhalite by leaching, a large amount of fresh water resources are required to prepare the leaching agent, which has become a restrictive factor for the already extremely arid Qaidam Basin, so that polyhalite in this area has not been effectively mined for a long time. mining
In addition, the current leaching agent is prepared with chemical reagents, which not only costs a lot but also produces certain pollution

Method used

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  • Mining method for polyhalite
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  • Mining method for polyhalite

Examples

Experimental program
Comparison scheme
Effect test

experiment example A1 and A3

[0040] A1. Using distilled water as the leaching agent, leaching 2g of polyhalite with 50ml of distilled water at a temperature of 25°C.

[0041] A2. Using oilfield water as a leaching agent, leaching 2g of polyhalite with 50ml of oilfield water at a temperature of 25°C.

[0042] A3. Using distilled water as the leaching agent, leaching 2g of polyhalite with 50ml of distilled water at a temperature of 50°C.

[0043] A4. Using oilfield water as the leaching agent, leaching 2g of polyhalite with 50ml of oilfield water at a temperature of 50°C.

[0044] Each group of experiments was sampled 4 times. For the first time, after pouring the leaching agent into the polyhalite powder, gently stir it with a glass rod for 3 seconds, let it stand for 20 minutes, and sample 1ml. Then, the experiment was carried out in the electrothermal constant temperature magnetic stirring water bath, the magnetic stirring speed was set to 200 rpm, and the second, third and fourth sampling were carried ou...

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Abstract

The invention relates to the technical field of salt chemical engineering, in particular to a mining method for polyhalite. The mining method for the polyhalite comprises the steps that S1, a polyhalite mining well or a polyhalite mining canal is formed in a polyhalite deposit; S2, oil field water is gathered from an oil field and serves as a leaching agent; S3, the leaching agent is injected froman injecting area of the polyhalite mining well or the polyhalite mining canal to an ore layer, so that the leaching agent makes contact with the polyhalite in the ore layer for leaching; and S4, theleaching agent after leaching is recovered, and polyhalite containing potassium is obtained. The oil field water is adopted as the leaching agent for leaching and mining the polyhalite, and leachingcan be conducted on the polyhalite effectively, furthermore, by adopting the oil field water as the leaching agent, on the one hand, the problem of severe shortage of freshwater resources required forleaching in a polyhalite deposit distribution area is solved, and on the other hand, double mining and utilizing of the oil filed water and the polyhalite is realized, and the trouble of oil filed drainage is solved.

Description

technical field [0001] The invention relates to the technical field of salt chemical industry, in particular to a polyhalite mining method. Background technique [0002] Polyhalite (K 2 SO 4 · MgSO 4 2CaSO 4 2H 2 O) is a kind of insoluble potassium salt ore widely distributed in sulfate-type potassium salt deposits, and its potassium content (in K 2 SO 4 Count) up to 28%. Polyhalite resources are very rich in the world, such as the Great Salt Flat, Big Wave Beach, and Chaerhan Salt Lake in the Qaidam Basin in western China; the Sichuan Basin and the Jianghan Basin in Hubei, etc. For potassium-deficient China, polyhalite deposits have become a valuable potash resource and have attracted widespread attention. Among them, the excessive burial depth (3-6 kilometers) makes the mining of polyhalite in the Sichuan Basin and Jianghan Basin a difficult problem, and the degree of mining realization is low. The burial depth of polyhalite in the Great Salt Flat area of ​​Qaidam...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/28
Inventor 李建森张永明李玉婷李廷伟山发寿
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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