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Process for producing potassium chloride by using potassic salt ores

A technology of potassium chloride and potassium salt ore, which is applied in the direction of alkali metal chloride, etc., can solve the problems of fine particle size of potassium chloride products, increase the production cost of enterprises, and easy agglomeration of products, so as to achieve coarse product particle size, convenient operation, The effect of widening the range of use

Inactive Publication Date: 2014-08-27
BLUESTAR LEHIGH ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The potassium chloride product obtained by this process has a fine particle size (the average particle size is only 0.074 mm), and the dehydration performance is poor. At the same time, due to the fine particle size of the potassium chloride product and high energy consumption during drying, the production cost of the enterprise is increased; in addition, the product is easy to agglomerate , causing inconvenience to use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1, a kind of technique that utilizes potash ore to produce Repone K, its steps are as follows:

[0016] (1) First crush the potash ore to 2-5 mm, then add it into the decomposition crystallizer by an electromagnetic oscillator, and add fresh water and circulating saturated liquid KCl—NaCl—MgCl into the decomposition crystallizer at the same time 2 —H 2 O quaternary system brine, the addition of fresh water is calculated according to the composition of the original ore, the general addition is 105% of the theoretical calculation value, and the addition of circulating brine is 2.5 times the weight of the original ore; when adding materials, the circulating brine and the original ore together Enter the reaction zone of the decomposition crystallizer, and fresh water is added to the junction of the reaction zone of the decomposition crystallizer and the crystallization zone;

[0017] (2) Put the underflow of the decomposition crystallizer into the flotation mach...

Embodiment 2

[0018] Embodiment 2, a kind of technique that utilizes potassium salt ore to produce potassium chloride, its steps are as follows:

[0019] (1) First crush the potash ore to 2-5 mm, then add it into the decomposition crystallizer by an electromagnetic oscillator, and add fresh water and circulating saturated liquid KCl—NaCl—MgCl into the decomposition crystallizer at the same time 2 —H 2 O quaternary system brine, the addition of fresh water is calculated according to the composition of the original ore, the general addition is 120% of the theoretical calculation value, and the addition of circulating brine is 8 times the weight of the original ore; when adding materials, the circulating brine and the original ore together Enter the reaction zone of the decomposition crystallizer, and fresh water is added to the junction of the reaction zone of the decomposition crystallizer and the crystallization zone;

[0020] (2) Put the underflow of the decomposition crystallizer into th...

Embodiment 3

[0021] Embodiment 3, in embodiment 1 or 2 described utilizing potash ore to produce in the technology of potassium chloride: add appropriate amount of fresh water in the fine-grain dissolving tank, push into settling tank after stirring, fully dissolving again, clarified liquid returns decomposition crystallizer.

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Abstract

The present invention is a kind of technology that utilizes potash ore to produce potassium chloride, and its steps are as follows: first crush potash ore to 2-5 millimeters, then add into decomposition crystallizer by electromagnetic oscillator, in decomposition crystallizer simultaneously Add fresh water and circulating saturated liquid KCl-NaCl-MgCl2-H2O quaternary system brine. When feeding, the circulating brine and raw ore enter the reaction zone of the decomposition crystallizer, and fresh water is added at the junction of the reaction zone and the crystallization zone of the decomposition crystallizer ;Put the underflow of the decomposing crystallizer into the flotation machine for flotation. The flotation process is one roughing, one sweeping, one or two selections; the selected concentrate is washed, centrifugally dehydrated, and dried to obtain potassium chloride product . The process of the invention has simple production process and convenient operation, and the content of each component of the raw potash ore is not limited. The obtained potassium chloride product has good quality, coarse particle size, easy filtration and centrifugal dehydration, reduced energy consumption during drying, and is not easy to agglomerate, bringing convenience to use.

Description

technical field [0001] The invention relates to a preparation process of potassium chloride, which is particularly suitable for preparing high-quality potassium chloride from carnallite ore. Background technique [0002] The methods for preparing potassium chloride from carnallite ore are generally divided into forward flotation method and reverse flotation-cold crystallization method. However, the positive flotation method used before is generally: carnallite → hydrolysis → flotation. After the carnallite is decomposed, it directly enters the flotation operation. The flotation generally adopts a roughing, a sweeping, and a second beneficiation. The second beneficiation concentrate is washed→dehydrated→dried to obtain potassium chloride product. The potassium chloride product obtained by this process has a fine particle size (the average particle size is only 0.074 mm), and the dehydration performance is poor. At the same time, due to the fine particle size of the potassium...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01D3/08
Inventor 张红茹宋文义刘升林
Owner BLUESTAR LEHIGH ENG INST CO LTD