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Method for purifying glauberite to prepare dihydrate gypsum

A technology of dihydrate gypsum and glauberite, applied in the direction of calcium/strontium/barium sulfate, etc., can solve the problems of low recovery rate of sodium sulfate, high safety risk, occupying large land, etc., to achieve a good product market prospect and reduce the degree of dependence. , the effect of low production cost

Active Publication Date: 2014-08-20
SICHUAN TONGQING NANFENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Anhydrous sodium sulfate in Sichuan exists in the form of glauberite ore. The two main components of glauberite ore are sodium sulfate and calcium sulfate. In the traditional production process of anhydrous sodium sulfate, chamber water-soluble This mining method will produce a large amount of glauberite ore and transport it out of the mine. The traditional treatment method for this mine is to build a glauberite ore storage yard and then spray it with water. The disadvantage of this method is that the recovery rate of sodium sulfate is low, and it takes up A large amount of land, high security risks, easy to cause environmental pollution and geological disasters, no economic benefits, etc.

Method used

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  • Method for purifying glauberite to prepare dihydrate gypsum

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Embodiment 1

[0031] A method for preparing dihydrate gypsum by purifying glauberite ore, comprising the steps of:

[0032] 1) The glauberite ore is crushed by crushing equipment to obtain glauberite ore powder; the particle size of the obtained glauberite ore powder is less than 8mm. Mineral powder below 8mm can fully dissolve sodium sulfate in water.

[0033] 2) Put the glauberite ore powder into the leaching mixing tank and mix it with the leaching water containing 20g / L of sodium sulfate in the leaching mixing tank. The mass ratio of the leaching water in the leaching mixing tank to the glauberite ore powder is 0.8:1. Sodium glauberite powder and sodium sulfate aqueous solution were leached for 1 hour. Because the mineral powder of this mass ratio and the immersion water of this concentration are under the action of the agitator, and the sodium sulfate in the glauberite ore can be fully dissolved in the water for 1 hour. The purpose of this step is to ensure that the solution concent...

Embodiment 2

[0042] A method for preparing dihydrate gypsum by purifying glauberite ore, comprising the steps of:

[0043] 1) The glauberite ore is crushed by crushing equipment to obtain glauberite ore powder; the particle size of the obtained glauberite ore powder is less than 8mm. Mineral powder below 8mm can fully dissolve sodium sulfate in water.

[0044] 2) Put the glauberite ore powder into the leaching and mixing tank, and mix it with the sodium sulfate aqueous solution containing 100g / L sodium sulfate in the leaching and mixing tank, and the quality of the leaching water in the leaching and mixing tank and the glauberite ore powder The ratio is 1.8:1. Glauberite powder and sodium sulfate aqueous solution were leached for 5 hours. Because the mineral powder of this mass ratio and the leaching water of this concentration are under the action of the stirrer, it takes 5 hours to ensure that the sodium sulfate in the glauberite ore is fully dissolved in the water. The purpose of thi...

Embodiment 3

[0053] A method for preparing dihydrate gypsum by purifying glauberite ore, comprising the steps of:

[0054] 1) The glauberite ore is crushed by crushing equipment to obtain glauberite ore powder; the particle size of the obtained glauberite ore powder is less than 8mm. Mineral powder below 8mm can fully dissolve sodium sulfate in water.

[0055] 2) Put the glauberite ore powder into the leaching and mixing tank, and mix it with the sodium sulfate aqueous solution containing 80g / L sodium sulfate in the leaching and mixing tank, and the quality of the leaching water in the leaching and mixing tank and the glauberite ore powder The ratio is 1.0:1. Sodium glauberite powder and sodium sulfate aqueous solution were leached for 2 hours. Because the mineral powder of this mass ratio and the immersion water of this concentration are under the action of the agitator, it takes 2 hours to ensure that the sodium sulfate in the glauberite ore is fully dissolved in the water. The purpos...

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Abstract

The invention discloses a method for purifying glauberite ore to prepare dihydrate gypsum, which comprises the following steps: 1) crushing glauberite ore by crushing equipment to obtain glauberite ore powder; 2) making glauberite ore powder Send it into the leaching mixing tank and mix it with the immersion water; 3) Send the mixture into a mechanical filtration device capable of quantitative washing to obtain a filter residue with a sodium sulfate content of less than 2% and a water content of less than 30%. ;4) The filter residue is made into a spherical material through a ball forming mechanism. This material is the finished dihydrate gypsum. In this application, the leached suspension is passed through a filter with washing function. According to the requirements of the sodium sulfate production process, it can be directly used as the raw material for the production of anhydrous sodium sulfate. Because the washing liquid contains sodium sulfate, it can be recycled as immersion water. Through this method, calcium sulfate dihydrate products that meet the national standards can be produced, and the operability Strong, low production cost, good market prospect.

Description

technical field [0001] The invention relates to a method for preparing dihydrate gypsum by purifying glauberite ore. Background technique [0002] my country's reserves of anhydrous sodium sulfate mineral resources are quite rich, mainly distributed in Sichuan, Jiangsu, Hunan, Guangxi, Shanxi and other places. Sichuan is the place with the largest reserves of anhydrous sodium sulfate in the country. Anhydrous sodium sulfate in Sichuan exists in the form of glauberite ore. The two main components of glauberite ore are sodium sulfate and calcium sulfate. In the traditional production process of anhydrous sodium sulfate, chamber water-soluble This mining method will produce a large amount of glauberite ore and transport it out of the mine. The traditional treatment method for this mine is to build a glauberite ore storage yard and then spray it with water. The disadvantage of this method is that the recovery rate of sodium sulfate is low, and it takes up A large amount of land...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F11/46
Inventor 彭诗谷
Owner SICHUAN TONGQING NANFENG
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