Salt pan for recovering sylvite at low cost and method for recovering sylvite by adopting salt pan

Abstract

The invention discloses a salt pan capable of recovering sylvite at low cost and a method for recovering sylvite by adopting the salt pan. The salt pan comprises a crystallizing pond (1) capable of receiving raw brine of the salt pan at the temperature of 45-50 DEG C, a corresponding tail liquid buffer pond (2) is arranged beside the crystallizing pond (1), and a brine conveying channel (3) is arranged between the crystallizing pond (1) and the tail liquid buffer pond (2). The method comprises the following steps: cooling salt pan raw brine input into the crystallizing pond (1) to a specifiedtemperature, crystallizing separated ores, conveying residual tail liquid to the tail liquid buffer pond (2) through a brine conveying channel (3), performing heat exchange preheating on the cooled tail liquid in the tail liquid buffer pond (2) and 85-65 DEG C high-temperature raw brine, heating the preheated tail liquid into a 80-100 DEG C high-temperature solvent through steam, and returning thesolvent to a stope. The salt pan is small in work amount and low in investment, minerals separated out of the salt pan under the natural temperature difference are monocomponent potassium chloride all the time, energy consumption is not needed, energy consumption is low, and the production cost is low.

Description

technical field [0001] The present invention relates to a new type of salt field technology for recovering potassium salt from salt lake brine, underground brine or water-soluble mining brine, in particular to a new type of salt field technology for recovering potassium salt from brine in deep solid potassium salt deposits by water-soluble mining method, specifically It is a low-cost salt pan for recovering potassium salt and a method for recovering potassium salt using the salt pan. Background technique [0002] When recovering potassium salt from traditional water-soluble brine, the more commonly used process is high-temperature evaporation plus vacuum crystallization technology to extract the required KCl product. The main disadvantages of this technology are: (1) complex process and high investment; (2) this technology needs to consume a lot of energy, high energy consumption, and high production cost; (3) the production process of this technology produces a large amount...

AI Technical Summary

Problems solved by technology

The main disadvantages of this technology are: (1) complex process and high investment; (2) this technology needs to consume a lot of energy, high energy consumption, and high production cost; (3) the production process of this technology produces a large amount of tailing salt waste, which cannot be recycled , requires a large area of ​​storage yard for storage, which will have an adverse impact on the environment of the mining area

The technical scheme of this patent utilizes the temperature difference between day and night, the duration of the low temperature is short, and it needs to be operated repeatedly day and night. The lower temperature at night causes the brine to precipitate minerals in the salt field, and the precipitated minerals are a multi-component mixture. It also needs to go through the processing plant for further flotation processing

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