Method for flotation of potassium chloride from potassium salt mine

Abstract

The invention relates to a method for the floatation of potassium chloride in a sylvite mine, and a method for producing the product of chemical industry, in particular to a novel floatation method for extracting the potassium chloride from the sylvite mine. The method of the invention mainly comprises the following steps: a. the sylvite mine is pulverized and graded, the particle size of the pulverized mine rages from 3 to 8mm, and the pulverized mine is processed by the operation of cooling decomposition by being added with sweet water; b. mine slurry obtained in the step a is led into a mineralization slot and is added with the saturated mother solution of potassium chloride, sodium chloride and magnesium chloride as well as a positive floating agent; and the mine slurry, the saturated mother solution and the positive floating agent are completely mixed to control the concentration of the mine slurry to be from 20 to 40 percent; c. the mine slurry obtained in the step b is led into a flotation separation device to obtain the potassium chloride by the positive floatation; and d. particles fallen to the bottom of a flotation column are milltailings, particles which are discharged from the flotation column and are caused to float to the top end of the flotation column are potassium chloride particles, and the particles are collected to be concentrated, filtered and dried. The method has the advantages of simple and stable process, easier automatic control, favorable flotation effect, low agent consumption and production cost, etc.

Description

technical field

[0001] The invention relates to a production method of chemical products, in particular to a new flotation method for extracting potassium chloride from potash ores. Background technique

[0002] Potassium salt is a mineral resource in short supply in my country. Due to the lack of potassium resources, there is a large gap between the supply and demand of potassium resources in my country. The output of domestic salt lake potash fertilizer and other manufacturers only accounts for 30% of the demand, and the long-term dependence on imports is as high as 70%.

[0003] There are mainly three kinds of raw materials for the production of potassium chloride fertilizer in my country. One is the chloride-type brine of the modern salt lake Chaerhan Salt Lake, which is mainly composed of carnallite and rock salt after drying the salt; It is carnallite and potassium halite; the third is seawater bittern as raw material.

[0004] Potash mines mainly include potassium hal...

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