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Polyhalite leaching agent and application thereof

A polyhalite and leaching agent technology, applied in the field of salt chemical industry, can solve problems such as high cost, pollution, and ineffective mining of polyhalite, and achieve the effect of increasing the leaching rate

Inactive Publication Date: 2018-02-13
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • 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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  • Polyhalite leaching agent and application thereof
  • Polyhalite leaching agent and application thereof
  • Polyhalite leaching agent and application thereof

Examples

Experimental program
Comparison scheme
Effect test

experiment example A1 and A3

[0033] A1. Using distilled water as the leaching agent, leaching 2g of polyhalite with 50ml of distilled water at a temperature of 25°C.

[0034] A2. Using oilfield water as a leaching agent, leaching 2g of polyhalite with 50ml of oilfield water at a temperature of 25°C.

[0035] A3. Using distilled water as the leaching agent, leaching 2g of polyhalite with 50ml of distilled water at a temperature of 50°C.

[0036] A4. Using oilfield water as the leaching agent, leaching 2g of polyhalite with 50ml of oilfield water at a temperature of 50°C.

[0037] 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 15 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 ...

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Abstract

The invention relates to the technical field of the salt chemical industry, in particular to a polyhalite leaching agent and an application thereof. The polyhalite leaching agent comprises oil field water and an acid chemical reagent. The volume ratio of the acid chemical reagent to the oil field water is 1:10-20. The oil field water is used as the leaching agent for leaching mining of polyhalite.The leaching agent can effectively leach the polyhalite. In the leaching process, the acid chemical reagent is added, and the leaching rate of K+ can be increased. Further, as the oil field water isadopted as the leaching agent, on one hand, the problem of a serious lack of fresh water resources required for leaching in polyhalite ore deposit areas is solved, and on the other hand, dual mining and utilization of oil field water and polyhalite is achieved, and the trouble of draining of oil fields is solved.

Description

technical field [0001] The invention relates to the technical field of salt chemical industry, in particular to a polyhalite leaching agent and its application. 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 ...

Claims

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Application Information

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IPC IPC(8): C22B3/06C22B3/10C22B26/10
CPCC22B3/065C22B3/10C22B26/10Y02P10/20
Inventor 李建森李玉婷张永明山发寿
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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