Method for purifying glauberite to prepare dihydrate gypsum

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...

AI Technical Summary

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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