A kind of mining method of solid potassium ore

Abstract

The invention discloses a mining method of solid potash ores. The method comprises the following steps: (1) mixing a diluted tail halide solution with solid potash ores, wherein the mass percent of magnesium chloride in the diluted tail halide solution is 22.5%-27%; the content of sodium chloride is not higher than 1%; the content of sodium chloride in the solid potash ores is 48%-79%; the content of magnesium chloride is 1%-4%; and the potassium content based on the mass percent of potassium chloride is lower than 1%; (2) mixing the diluted tail halide solution with solid; and (3) separating brine which absorbs potassium ingredients in the solid ores from a solid layer, introducing into an evaporation pond, evaporating by virtue of natural energy sources such as solar energy and wind energy, and introducing upper brine into another evaporation pond to further evaporate and separate out solid and liquid after the proportion of the brine is 1.24-1.26. Carnallite is prepared from waste tail halide and ultralow-grade solid potash ores, and meets the requirements of circular economy reduction, recycling and resource utilization; and the mining method has a wide application prospect in development of a salt lake potassium resource.

Description

technical field [0001] The invention belongs to the technical field of comprehensive salt lake resources, and in particular relates to a method for preparing potassium chloride from ultra-low-grade solid potassium ore in the Chaerhan Salt Lake area by using the principle of absorption-evaporation-flotation. technical background: [0002] Potassium fertilizer is one of the important factors related to my country's agricultural safety. Chaerhan Salt Lake is the main production base of potassium fertilizer in my country. The lake area has the largest potassium salt deposit with industrial mining value in China. Solid ore and liquid ore coexist in this deposit, of which solid potassium Potassium ore accounts for about 55% of the total resources (potassium in solid ore exists in the form of carnallite and potassium halite), but the ore layer of solid ore is relatively thin, low in grade, dispersed and discontinuous, and other reasons make direct mining difficult. Big difficulty. A...

AI Technical Summary

Problems solved by technology

[0008] In order to overcome the defect that the existing technology cannot exploit ultra-low-grade potassium ore, the invention provides a high-efficiency recovery method for ultra-low-grade solid potassium ore, which can be applied to potassium with a solid potassium chloride content of 0.1 to 1%. mining of mine