Method for preparing potassium chloride

Abstract

The invention relates to a method for preparing potassium chloride, comprising the steps of mixing electric precipitation dust containing 10-25wt percent of potassium chloride with potassium chloride The invention relates to a method for preparing potassium chloride, comprising the steps of mixing electric precipitation dust containing 10-25wt percent of potassium chloride with potassium chloridesaturated aqueous solution in normal temperature and normal atmosphere at the weight ratio of 4-7:1, sufficiently stirring the mixture under a heating condition, obtaining potassium chloride solutionsaturated aqueous solution in normal temperature and normal atmosphere at the weight ratio of 4-7:1, sufficiently stirring the mixture under a heating condition, obtaining potassium chloride solutionand filter residue after thermal filtration, cooling and crystallizing the potassium chloride solution to obtain the finish product of potassium chloride. The method has the advantages of low water anand filter residue after thermal filtration, cooling and crystallizing the potassium chloride solution to obtain the finish product of potassium chloride. The method has the advantages of low water and energy consumption and high extraction yield of potassium chloride.d energy consumption and high extraction yield of potassium chloride.

Description

A method for preparing potassium chloride Technical field The invention relates to a method for preparing potassium chloride, in particular to a method for preparing potassium chloride by using sintering electric dust removal ash of iron and steel enterprises. Background technique Traditional potassium chloride preparation processes are divided into two types, one is to extract potassium chloride from natural potassium ore, and the other is to extract potassium from potassium bittern or seawater, but both of these preparation methods have complex processes and operating costs. High defects, and with the increasing shortage of mineral resources and bittern potassium resources, the cost of raw materials continues to increase. At the same time, traditional preparation processes will cause environmental pollution and energy waste. Chinese patent document CN101234766A discloses a method for producing potassium chloride by sintering electric dust removal ash from iron and steel ente...

AI Technical Summary

Problems solved by technology

For this reason, the technical problem to be solved by the present invention is: to overcome the shortcomings of large water consumption, high energy consumption, and low extraction rate of potassium chloride when preparing potassium chloride in the prior art, and provide a method with less water consumption and low energy consumption. , the method for preparing Potassium Chloride with high extraction rate of Potassium Chloride