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Method for extracting potassium chloride from high-silt-content high-grade feldspar salt mine

A technology of potassium halite and potassium chloride, applied in the direction of alkali metal chloride, etc., can solve problems such as difficulty in potassium chloride, achieve the effects of less investment in equipment, full use of resources, and improvement of concentrate quality

Inactive Publication Date: 2014-05-14
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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Problems solved by technology

[0007] The purpose of the present invention is to overcome the difficulty in extracting potassium chloride from potash rock salt mines with high mud content (water insoluble matter: 20% to 45%) and low grade (KCl: 10% to 19%) in the prior art. Provide a method for extracting potassium chloride from high-mud low-grade potash rock salt ore

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  • Method for extracting potassium chloride from high-silt-content high-grade feldspar salt mine
  • Method for extracting potassium chloride from high-silt-content high-grade feldspar salt mine
  • Method for extracting potassium chloride from high-silt-content high-grade feldspar salt mine

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Embodiment Construction

[0043] The following is a preferred embodiment of the present invention, which is only used as an explanation of the application rather than a limitation.

[0044] Use a crusher to crush the gray-green potassium halite raw ore with a mud content of 20%-40% and a potassium chloride content of 10%-19% or its mixed ore with a blue-gray potassium halite ore to obtain a particle size of less than 40 mm ore. The crushed ore enters the rod mill or ball mill through the pendulum feeder and the belt scale. At the same time, the saturated mother liquor of potassium chloride and sodium chloride flowing down from the high level tank is added to the entrance of the mill, and the slurry at the outlet of the mill passes through the water The rotary classifier or spiral classifier screens the particle size of the minerals, so that the minerals with a particle size of less than 1 mm enter the next process, and the minerals with a particle size larger than 1 mm return to the rod mill or ball mi...

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Abstract

The invention discloses a method for extracting potassium chloride from a high-silt-content high-grade feldspar salt mine. The method comprises the following steps: (1) crushing and grinding the feldspar salt mine to obtain ore particles; (2) mixing the ore particles and a solvent to prepare slurry with the mass concentration of 25-40 percent, and desliming to obtain deslimed concentrate; and (3) preparing 20-30% ore pulp from the deslimed concentrate by using potassium chloride and sodium chloride co-saturated mother liquor, simultaneously adding a slurry inhibitor and a collecting agent, carrying out rough concentration on the ore pulp to obtain rough ore concentrate and concentrate to be swept, and carrying out more than two stages of selection on the rough ore concentrate to obtain selected foams, and dewatering the selected foams to obtain a potassium chloride product. According to the method disclosed by the invention, not only is the problem of waste ore accumulation solved, but also the environment-friendly problem is solved, resources are sufficiently utilized, wastes are turned into treasures, and the economic and social benefits are relatively remarkable.

Description

technical field [0001] The invention relates to the field of salt lake chemistry, in particular to an industrialized production of extracting potassium chloride from high-mud, low-grade potash rock salt mines. Background technique [0002] Potassium resources in the world are extremely rich, most of which are underground solid potash mines, and a small part are potassium-containing brines. The distribution of resources is mainly concentrated in Canada, Russia, Belarus and Germany. The potash reserves of the four countries account for 93% of the world's total. Potassium resources are scarce in my country, mainly salt lake-type potash deposits, which are concentrated in Qinghai, Xinjiang, Tibet and other provinces and regions. The proven potassium resources are mainly distributed in Chaerhan in the Qaidam Basin of Qinghai and Lop Nur in Xinjiang ; while the salt lake type potash deposit has less solid potassium salt, and there are technical difficulties in its exploitation. ...

Claims

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Application Information

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IPC IPC(8): C01D3/08
Inventor 聂锋李丽娟宋富根刘志启曾忠民姬连敏时东田泽黎刘大伟赖培明
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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