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Method for producing potassium chloride by utilizing tertiary solid sylvite ore inverse flotation method

A technology of potassium chloride and potash mines, applied in the direction of alkali metal chlorides, etc., can solve problems such as technical weaknesses, and achieve the effect of saving investment and operating costs

Inactive Publication Date: 2011-08-10
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the domestic technology of producing potassium chloride by using ancient solid potassium salt resources is relatively weak

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1 A kind of method utilizing the tertiary period solid potash ore reverse flotation method to produce potassium chloride comprises the following steps:

[0024] (1) After the raw ore is crushed to a particle size of less than 1mm by a hammer crusher produced by Wuhan Prospecting Machinery Factory, 750g of raw ore is taken, and 2250g of mother liquor is added to the mixing tank for slurry mixing to obtain 3000g of slurry.

[0025] Wherein the mother liquor refers to the mixed liquor obtained by adding water to the raw material ore according to the weight ratio of raw material ore and water 3:1 to decompose.

[0026] (2) The slurry is sent to the flotation process, and the flotation agent is added to the slurry, wherein the weight ratio of the raw material ore and the flotation agent is 1000:0.05; Flotation was carried out in the process of selection and first-level selection, and the flotation was carried out for 5 minutes. After being filtered by the SS-300 t...

Embodiment 2

[0031] Embodiment 2 A kind of method utilizing the tertiary period solid potash ore reverse flotation method to produce potassium chloride comprises the following steps:

[0032] (1) After the raw ore is crushed by a crusher until the particle size is less than 1mm, 750g of raw ore is taken, and 3000g of mother liquor is added to the stirring tank for slurry mixing to obtain 3750g of slurry.

[0033] Wherein the mother liquor refers to the mixed liquor obtained by adding water to the raw material ore and decomposing it according to the weight ratio of raw material ore and water 3.3:1.

[0034] (2) The slurry is sent to the flotation process, and the flotation agent is added to the slurry, wherein the weight ratio of the raw material ore and the flotation agent is 1000:0.20; Flotation is carried out in the first-level selection process, and the flotation is 5min in total, and 443g of flotation concentrate carnallite (including 90.50% of carnallite), 331g of flotation tailings s...

Embodiment 3

[0039] Embodiment 3 A kind of method that utilizes tertiary solid sylvite reverse flotation method to produce potassium chloride comprises the following steps:

[0040] (1) After the raw ore is crushed by a crusher until the particle size is less than 1mm, 750g of raw ore is taken, and 2625g of mother liquor is added to the stirring tank for slurry mixing to obtain 3375g of slurry.

[0041]Wherein the mother liquor refers to the mixed liquor obtained by adding water to the raw material ore according to the weight ratio of raw material ore and water 3.2:1 to decompose.

[0042] (2) The slurry is sent to the flotation process, and the flotation agent is added to the slurry, wherein the weight ratio of the raw material ore and the flotation agent is 1000:0.13; Flotation is carried out in the first-level selection process, and the flotation is carried out for 5 minutes. After being filtered by a centrifuge, 456g of flotation concentrate carnallite (including 91.01% of carnallite),...

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PUM

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Abstract

The invention relates to a method for producing potassium chloride by utilizing a tertiary solid sylvite ore inverse flotation method, which comprises the following steps of: firstly crushing a tertiary solid sylvite raw material ore into grains the diameter of which is smaller than 1mm, and then adding a mother liquor to obtain a slurry; then adding a floating agent into the slurry, uniformly mixing, then floating according to the flows of primary roughing, primary scavenging and primary selection and filtering to respectively obtain flotation concentrate carnallite, flotation tailing sodiumchloride and a decomposition mother liquor; next, cooling the decomposition mother liquor after evaporating twice, and then totally converting the mother liquor into a magnesium chloride product; decomposing and crystallizing the flotation concentrate carnallite to obtain coarse potassium chloride; and finally repulping, washing, filtering and drying the coarse potassium chloride to obtain a potassium chloride product with the grade higher than 97 percent. In the invention, a crude ore is crushed in a simple crushing mode, and an inverse flotation process is adopted, not only effectively saving the investment and the operating cost of ore grinding equipment, but also improving the yield and the purity of the potassium chloride.

Description

technical field [0001] The invention relates to a method for producing potassium chloride, in particular to a method for producing potassium chloride by reverse flotation of tertiary solid potassium salt ore. Background technique [0002] Potassium resources in the world are extremely rich, with a total of 250 billion tons of resources. Most of them are underground solid potassium salts, and a small part is potassium-containing brine. They are mainly distributed in North America, Europe, South America, the Middle East, Thailand, Laos and other countries in Asia. However, my country's potassium salt resources are scarce, especially the lack of large soluble solid potassium salt deposits. There are 40 proven soluble potassium salt deposits, including 6 large ones, distributed in Qinghai, Xinjiang, Tibet, Yunnan, Shandong, Gansu and other provinces. Among them, potassium-rich salt lakes are concentrated in the Qaidam Basin. The grade of these potassium-rich salt lakes is relati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01D3/08
Inventor 张志宏马海州朱明松曾波程怀德李丽娟
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI