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Application of calcium-chloride-containing aqueous solution in conversion exploitation of glauberite resource and conversion exploitation method of glauberite resource

A mining method, glauberite technology, applied in the direction of mining fluid, earthwork drilling, wellbore/well components, etc., can solve problems such as examples that have no industrial application

Active Publication Date: 2015-03-18
江苏苏盐井神股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, according to the current data, there is no research on the exploitation and utilization of glauberite resources associated with rock salt at home and abroad, and there is no example of industrial application

Method used

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  • Application of calcium-chloride-containing aqueous solution in conversion exploitation of glauberite resource and conversion exploitation method of glauberite resource

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Embodiment 1: the 1m 3 Contains CaCl 2 The 20g / L solution (or aqueous solution) is injected into the sodium sulfate rock salt mine. The rock salt is in an underground environment of about 50°C. Soluble salts such as sodium chloride and mirabilite are first dissolved in water (that is, the water contained in the solution), and at the same time Glauber's salt is also dissolved and decomposed into slightly soluble calcium sulfate and soluble sodium sulfate in the environment of calcium chloride solution. Calcium sulfate precipitates downhole, while sodium sulfate dissolves in water. At this time, the dissolved sulfuric acid All the sodium reacts with the original calcium chloride in the solution to form slightly soluble calcium sulfate, which precipitates at the bottom of the well, and at the same time produces soluble sodium chloride, which dissolves in water and flows with the brine, and a small amount of Glauber's salt dissolves. After 1 month enough time for settlemen...

Embodiment 2

[0059] Embodiment 2: the 1m 3 Contains CaCl 2 Inject a 40g / L solution into a sodium sulfate rock salt mine. The rock salt is in an underground environment of about 50°C. Soluble salts such as sodium chloride and thenardite are first dissolved in water. At the same time, glauberite is also dissolved in the environment of calcium chloride solution. The solution is decomposed into slightly soluble calcium sulfate and soluble sodium sulfate. Calcium sulfate precipitates downhole, while sodium sulfate dissolves in water. At this time, all the dissolved sodium sulfate reacts with the original calcium chloride in the solution to form Slightly soluble calcium sulfate, the precipitation well is low, and soluble sodium chloride is produced at the same time, which dissolves in water, and the unreacted calcium chloride is mined out along with the bittern. After 1 month enough time for settlement, about 0.9m 3 NaCl 302g / L, CaCl 2 18g / L of bittern.

Embodiment 3

[0060] Embodiment 3: the 1m 3 Contains CaCl 2Inject the 80g / L solution into the sodium sulfate rock salt mine. The rock salt is in the underground environment of about 50°C. Soluble salts such as sodium chloride and thenardite are first dissolved in the water. At the same time, the glauberite is also dissolved in the environment of calcium chloride solution. The solution is decomposed into slightly soluble calcium sulfate and soluble sodium sulfate. Calcium sulfate precipitates downhole, while sodium sulfate dissolves in water. At this time, all the dissolved sodium sulfate reacts with the original calcium chloride in the solution to form Slightly soluble calcium sulfate, the precipitation well is low, and soluble sodium chloride is produced at the same time, which dissolves in water, and the unreacted calcium chloride is mined out along with the bittern. After 1 month enough time for settlement, about 0.9m 3 NaCl 259g / L, CaCl 2 61g / L of bittern.

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Abstract

The invention relates to application of calcium-chloride-containing aqueous solution in conversion exploitation of a glauberite resource and a conversion exploitation method of the glauberite resource. The conversion exploitation method comprises the following steps: pouring the calcium-chloride-containing aqueous solution into a rock salt exploitation mine or a low-grade glauberite mine; dissolving and decomposing the glauberite into sparingly-soluble calcium sulfate and soluble sodium sulfate under a calcium chloride solution environment, wherein the calcium sulfate is precipitated in the mine, and the sodium sulfate is dissolved in the water; reacting all dissolved sodium sulfates react with calcium chloride in the calcium-chloride-containing aqueous solution, so as to generate the sparingly-soluble calcium sulfate, precipitate sparingly-soluble calcium sulfate in the bottom of the mine, and synchronously generate soluble sodium chloride and dissolve soluble sodium chloride in the water; and finally exploiting the mineral halide after dissolution for a period of time. According to the conversion exploitation method, the calcium-chloride-containing aqueous solution is adopted in the rock salt exploitation based on a conventional rock salt solution exploitation method, and all the associate glauberite resources in the rock salt can be exploited and utilized, so that the comprehensive utilization ratio of the rock salt resource can be increased.

Description

technical field [0001] The invention relates to the use of an aqueous solution containing calcium chloride for conversion and mining of glauberite resources and a method for conversion and mining of glauberite resources, especially for the mining of rock salt (or well salt) containing glauberite. [0002] The method of transforming and exploiting rock salt associated glauberite resources with an aqueous solution containing calcium chloride is, specifically, injecting an aqueous solution containing calcium chloride into rock salt mines, while mining easily soluble salt resources such as sodium chloride and thenardite, Using CaCl 2 The principle that the solution is beneficial to promote the dissolution and decomposition of glauberite, so that the associated glauberite in the salt mine can be dissolved and decomposed to obtain easily soluble sodium sulfate, while the SO produced by the dissolution of rock salt 4 2- The reaction with the Ca in solution 2+ Reaction to form CaSO...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/28
Inventor 张文广刘正友蒋海斌艾红卢青峰宋茜茜曹军黄承
Owner 江苏苏盐井神股份有限公司