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Method for preparing potassium chloride from solid ore containing potassium, ammonium and magnesium

A solid ore, potassium chloride technology, applied in the direction of alkali metal chloride and the like, can solve problems such as unsuitable application, and achieve the effects of low cost, simple process and improved resource utilization.

Active Publication Date: 2018-03-06
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Potassium chloride is mainly used in the inorganic industry. It is the basic raw material for the manufacture of various potassium salts or alkalis such as potassium hydroxide, potassium sulfate, potassium nitrate, potassium chlorate, and potassium alum. For example, it is used as a diuretic in the pharmaceutical industry and prevents potassium deficiency. In the dye industry, it is used to produce G salt, reactive dyes, etc.; in agriculture, it is used as potassium fertilizer, which has a fast fertilizer effect and is directly applied to farmland, which can increase the moisture in the lower layer of the soil and have the effect of drought resistance. But in saline-alkali land and tobacco , sweet potato, sugar beet and other crops should not be applied

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  • Method for preparing potassium chloride from solid ore containing potassium, ammonium and magnesium
  • Method for preparing potassium chloride from solid ore containing potassium, ammonium and magnesium

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Effect test

Embodiment 1

[0040] The method for preparing potassium chloride from the solid ore containing potassium ammonium magnesium of the present embodiment comprises the following steps:

[0041] In step S1, the solid ore is crushed and passed through a 40-mesh sieve, and the first sieve undersize is taken for use.

[0042] In step S2, the first undersize and fresh water are mixed in a mass ratio of 2:1, and stirred at 0 °C for 4 hours to fully decompose, and then wet sieved through a 40-mesh sieve and solid-liquid separated to obtain the The second sieve with a potassium ion content of 11%, the second undersize with a potassium ion content of 33%, and the liquid phase; the potassium ion yield is 65%.

[0043] In step S3, the second undersize and the liquid phase are mixed for one flotation, and the first flotation conditions are that the solid-liquid ratio is 1:3, the dosage of flotation reagent is 7 mL, mixing for 5 min, and flotation for 1 min. The potassium ion content in the flotation conce...

Embodiment 2

[0046] The method for preparing potassium chloride from the solid ore containing potassium ammonium magnesium of the present embodiment comprises the following steps:

[0047] In step S1, the solid ore is crushed and passed through a 40-mesh sieve, and the first sieve undersize is taken for use.

[0048] In step S2, the first undersize and fresh water are mixed in a mass ratio of 10:7, and stirred at 25 ° C for 16 hours to fully decompose, and then wet sieved through an 80-mesh sieve and solid-liquid separation, to obtain wherein The second sieve with a potassium ion content of 10%, the second undersize with a potassium ion content of 37%, and the liquid phase, the potassium ion yield was 63%.

[0049] In step S3, the second undersize is mixed with the liquid phase for one flotation, and the first flotation conditions are that the solid-liquid ratio is 1:6, the dosage of flotation reagent is 7 mL, mixing for 10 minutes, and flotation for 3 minutes, and the first flotation is o...

Embodiment 3

[0052] The method for preparing potassium chloride from the solid ore containing potassium ammonium magnesium of the present embodiment comprises the following steps:

[0053] In step S1, the solid ore is crushed and passed through a 40-mesh sieve, and the first sieve undersize is taken for use.

[0054] In step S2, the first undersize and fresh water are mixed in a mass ratio of 5:3, and stirred at 20°C for 8 hours to fully decompose, and then wet sieved through a 60-mesh sieve and solid-liquid separated to obtain the The second sieve with a potassium ion content of 10%, the second undersize with a potassium ion content of 36%, and the liquid phase; the potassium ion yield is 64%.

[0055] In step S3, the second undersize and the liquid phase are mixed for a flotation, and the first flotation conditions are that the solid-liquid ratio is 1:9, the amount of flotation reagent is 8 mL, the mixing is 8 minutes, and the flotation is 2 minutes. The potassium ion content in the flo...

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Abstract

The invention provides a method for preparing potassium chloride from a solid ore containing potassium, ammonium and magnesium. The solid ore contains the following components in percentage by weight:5.1%-5.9% of potassium ions, 1.0%-1.4% of ammonium ions, 9.5%-10.0% of magnesium ions and 35.2%-37.1% of chloride ions. The method comprises the following steps: (S1) crushing the solid ore containing potassium, ammonium and magnesium, and sieving, so as to obtain a first screen underflow; (S2) mixing the first screen underflow with water in a mass ratio of (100) to (50-70) to adequately decomposing the first screen underflow, carrying out wet sieving by virtue of a 40-80-mesh sieve, and carrying out solid-liquid separation, so as to obtain a second screen underflow; and (S3) carrying out primary flotation on the second screen underflow so as to obtain a first flotation concentrate, and carrying out washing, solid-liquid separation and drying, so as to obtain the potassium chloride product. According to the method, a decomposing-sieving-floatation process is formulated according to the constitution of the solid ore containing potassium, ammonium and magnesium and is utilized for preparing potassium chloride, obtained potassium chloride can be used as a production raw material, the whole process flow is simple and low in cost, the utilization problem of potassium is solved, and theresource utilization rate is effectively increased.

Description

technical field [0001] The invention belongs to the technical field of inorganic / salt lake chemical industry, in particular to a method for preparing potassium chloride from solid ore containing potassium, ammonium and magnesium. Background technique [0002] Potassium chloride is mainly used in the inorganic industry and is the basic raw material for the manufacture of various potassium salts or alkalis such as potassium hydroxide, potassium sulfate, potassium nitrate, potassium chlorate, potassium red alum, etc. In the dye industry, it is used to produce G salt, reactive dyes, etc.; in agriculture, it is used as potash fertilizer, which has a fast fertilizer effect. , sweet potato, sugar beet and other crops should not be used. Potassium chloride is similar in taste to sodium chloride (bitter) and is also used as an additive for low-sodium or mineral waters. In addition, potassium chloride is also used in the manufacture of muzzle or muzzle flame suppressant, steel heat ...

Claims

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Application Information

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IPC IPC(8): C01D3/08
Inventor 魏明杨红军王敏钟远
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI