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Method for preparing potassium chloride from solid kali salt mine through rotating decomposition and positive flotation

A production method and technology of potash mines, applied in the direction of alkali metal chloride, etc., can solve the problems of uncontinuous production of coarse grain sinks and blockage of material conveying, and achieve large production capacity, low production energy consumption and good process stability Effect

Active Publication Date: 2012-05-09
YUNNAN CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the sodium chloride in the slurry after the decomposition of coarse potash ore still maintains a relatively large particle size and a certain mass concentration, resulting in problems such as decomposition of potash ore, material transportation blockage in the flotation process, and continuous production of the coarse particle settling tank.
The solid potassium salt ore mined underground has a high coarse particle content, and the cold decomposition of the existing salt field evaporated carnallite ore-direct flotation production technology and equipment is difficult to adapt to the flotation of the solid potassium salt ore mined underground. production of potassium chloride

Method used

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  • Method for preparing potassium chloride from solid kali salt mine through rotating decomposition and positive flotation
  • Method for preparing potassium chloride from solid kali salt mine through rotating decomposition and positive flotation
  • Method for preparing potassium chloride from solid kali salt mine through rotating decomposition and positive flotation

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Underground mining of solid potash ore is 1.00 tons per hour, and the continuous production is 10 hours.

[0026] (1) The chemical composition of the comprehensive mineral sample is:

[0027]

[0028] (1) Broken

[0029] The purpose of crushing is to control the particle size of potash ore within -10mm, and to provide raw materials with suitable particle size for rotary decomposition.

[0030] (2) Rotation decomposition and classification

[0031] In the rotary decomposer, the ore cast is 1 ton / hour, the amount of water added is 0.40 ton / hour, and the mother liquor is added to be 0.38 ton / hour. The decomposition temperature is 28-34°C, and the rotating speed of the rotary decomposer is 44 rpm; the concentration of the pulp obtained by decomposition is 24.38%, and the average potassium chloride content of the classified coarse-grained sodium chloride rock salt is 1.17%.

[0032] (3) Pipe flow mineralization

[0033] The ore pulp obtained from the rotary cold decom...

Embodiment 2

[0039] Underground mining of solid potash ore has a ore input of 2.16 tons / hour and continuous production for 6 hours.

[0040] (1) The typical chemical composition of solid potash ore mined underground is:

[0041]

[0042] (2) Broken

[0043] The purpose of crushing is to control the particle size of potash ore within -10mm, and to provide raw materials with suitable particle size for rotary decomposition.

[0044] (3) Rotation decomposition and classification

[0045] The ore cast in the rotary decomposer is 2.16 tons / hour, the amount of water added is 0.83 tons / hour, and the addition of mother liquor is 0.43 tons / hour. The decomposition temperature is 28~34℃, and the rotating speed of the rotary decomposer is 30 rpm; the concentration of the pulp obtained by the decomposition is 25.54%, and the average potassium chloride content of the classified coarse-grained sodium chloride rock salt is 1.72%.

[0046] (4) Pipe flow mineralization

[0047] The ore pulp obtained fro...

Embodiment 3

[0053] Underground mining of solid potash ore has a ore input of 1.57 tons / hour and continuous production for 9 hours.

[0054] (1) The typical chemical composition of solid potash ore mined underground is:

[0055]

[0056] (2) Broken

[0057] The purpose of crushing is to control the particle size of potash ore within -10mm, and to provide raw materials with suitable particle size for rotary decomposition.

[0058] (3) Rotation decomposition and classification

[0059] The ore cast in the rotary decomposer is 1.57 tons / hour, the amount of water added is 0.65 tons / hour, and the addition of mother liquor is 0.88 tons / hour, the above-mentioned solid potash ore is decomposed in the rotary decomposer, and the time of decomposition is controlled to be 0.50 hours, The decomposition temperature is 30-32°C, and the rotating speed of the rotary decomposer is 15 rpm; the concentration of the decomposed pulp is 31.90%, and the average potassium chloride content of the graded coarse...

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Abstract

The invention relates to a method for preparing potassium chloride from solid kali salt mine through rotating decomposition and positive flotation, belonging to the technical field of chemical industries, in particular to a process method for producing potassium chloride by mining the solid kali salt mine in an underground manner. The process flow disclosed by the invention comprises the steps of coarsely crushing the solid kali salt blocky mine raw material in a closed manner, rotatably decomposing and selectively grading, mineralizing a pipe flow, carrying out columnar positive flotation, separating, washing slurry, separating again, drying and obtaining a potassium chloride product. The method disclosed by the invention has the outstanding benefits that: the method for preparing the potassium chloride from the solid kali salt mine through the rotating decomposition and positive flotation is provided at first time; the potassium chloride product is produced by aiming at the solid kali salt blocky mine raw material mined in an underground manner; and the process has wide popularization value.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and particularly relates to a process method for producing potassium chloride by mining solid potash ore underground. Background technique [0002] Potassium fertilizer is an indispensable basic fertilizer for agriculture. The annual demand for potash fertilizer in my country is far greater than the production capacity. In the neighboring countries of our country, the proven solid potash ore reserves are large, which can be mined by underground mining - chemical flotation. method for resource-based development. Most of the potassium chloride products in the world are extracted by flotation process. The processes that have been industrialized include cold decomposition-positive flotation and reverse flotation-cold crystallization, and are mainly used in the evaporation of carnallite mines in Yantian. processing. The solid potash ore mined underground is subjected to closed-circuit coars...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01D3/08
Inventor 曾波王国栋李骥
Owner YUNNAN CHEM RES INST
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