Method for purifying glauberite to prepare dihydrate gypsum

A technology of dihydrate gypsum and glauberite, which is applied in the direction of calcium/strontium/barium sulfate, etc., can solve the problems of low recovery rate of sodium sulfate, high safety risk, and large land occupation, so as to achieve good market prospects and reduce dependence , the effect of low production cost

Active Publication Date: 2013-03-13
SICHUAN TONGQING NANFENG
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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.

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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 to prepare dihydrate gypsum, which comprises the following steps of: 1) breaking glauberite by breaking equipment to obtain glauberite powder; 2) feeding the glauberite powder into a leaching stirring barrel and mixing with infiltration water; 3) feeding the mixture into mechanical filtering equipment capable of realizing quantitative washing to obtain filter residues of which the sodium sulfate content is lower than 2% and the water content is lower than 30%; and 4) making the filter residues into a pellet material by a pelletizer, wherein the material is a finished product of dihydrate gypsum. According to the invention, the infiltrated suspension is processed by a filter with a washing function, and the filtrate after filtration can be directly used as a raw material for producing anhydrous sodium sulfate since the concentration of sodium sulfate meets the requirements of the production technology of anhydrous sodium sulfate; the washing liquid containing sodium sulfate can be recovered as infiltration water; calcium sulphate dihydrate products reaching the national standard can be prepared by the method; and the method has strong operability and good market prospects, and the production cost is low.

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 Applications(China)
IPC IPC(8): C01F11/46
Inventor 彭诗谷
Owner SICHUAN TONGQING NANFENG
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