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 chemical instruments and methods, inorganic chemistry, alkali metal compounds, etc., can solve problems such as no examples of industrial application

Active Publication Date: 2013-02-20
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] Example 1: Put 1m 3 Contains CaCl 2 Inject a 20g / L solution (or aqueous solution) into a sodium sulfate type rock salt mine. The rock salt is in an environment of about 50 ℃ underground, and soluble salts such as sodium chloride and Glauber's salt are first dissolved in water (that is, the water contained in the solution). Glauber's salt is also decomposed into slightly soluble calcium sulfate and soluble sodium sulfate in the environment of calcium chloride solution. Calcium sulfate precipitates in the well, while sodium sulfate is dissolved 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 settles at the bottom of the well, and at the same time produces soluble sodium chloride, which is dissolved in water, and a small amount of Glauber's salt is dissolved as the brine flows. After 1 month enough time to settle, about 0.9m is mined 3 NaCl 316g / L, Na ...

Embodiment 2

[0059] Example 2: Put 1m 3 Contains CaCl 2 Inject a 40g / L solution into a sodium sulfate type rock salt mine. The rock salt is in an environment of about 50°C underground. Sodium chloride and Glauber's salt are first dissolved in the water. At the same time, Glauber's salt is also dissolved in the environment of calcium chloride solution. Liquor decomposes into slightly soluble calcium sulfate and soluble sodium sulfate. Calcium sulfate precipitates in the well, while sodium sulfate is dissolved in water. At this time, the dissolved sodium sulfate all reacts with the original calcium chloride in the solution to form Slightly soluble calcium sulfate, the sedimentation well is low, and at the same time, soluble sodium chloride is produced, which is dissolved in water, and the unreacted calcium chloride is mined along with the mineral brine. After 1 month enough time to settle, about 0.9m is mined 3 NaCl 302g / L, CaCl 2 18g / L bittern.

Embodiment 3

[0060] Example 3: Put 1m 3 Contains CaCl 2 Inject the 80g / L solution into the sodium sulfate type rock salt mine. The rock salt is at about 50℃ underground. Sodium chloride and Glauber's salt are dissolved in the water first. At the same time, Glauber's salt is also dissolved in the calcium chloride solution. Liquor decomposes into slightly soluble calcium sulfate and soluble sodium sulfate. Calcium sulfate precipitates in the well, while sodium sulfate is dissolved in water. At this time, the dissolved sodium sulfate all reacts with the original calcium chloride in the solution to form Slightly soluble calcium sulfate, the sedimentation well is low, and at the same time, soluble sodium chloride is produced, which is dissolved in water, and the incompletely reacted calcium chloride is mined with the mineral brine. After 1 month enough time to settle, about 0.9m is mined 3 NaCl 259g / L, CaCl 2 61g / L 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 the conversion and mining of glauberite resources and a method for the conversion and mining of glauberite resources, especially for the mining of rock salt (or well salt) containing glauberite. [0002] The method of transforming and mining rock salt-associated glauberite resources with an aqueous solution containing calcium chloride is specifically to inject the aqueous solution containing calcium chloride into a rock salt mine, while mining sodium chloride, mirabilite and other easily soluble salt resources, Use CaCl 2 The solution is conducive to promoting the principle of glauber's salt decomposition, so that the associated glauber's salt in the salt mine can be dissolved and decomposed to obtain easily soluble sodium sulfate, and the SO produced by the dissolution of rock salt 4 2- Reaction with Ca in solution 2+ Reaction to form CaSO 4 Precipitation and conversion t...

Claims

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Application Information

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IPC IPC(8): C01D5/00C01F11/46
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
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