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Method for extracting polyhalite from polyhalite ore containing gangue mineral

A technology of gangue minerals and polyhalite mines, applied in chemical instruments and methods, wet separation, selective deposition methods, etc., can solve the effects of polyhalite flotation, acid salts and detrital salts and other gangue minerals There are no reports on the development and utilization of polyhalite mines, etc., to achieve the effect of reducing extraction costs and increasing product yield

Active Publication Date: 2018-10-30
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

[0003] Generally speaking, the gangue mineral in polyhalite ore is sodium chloride (NaCl), but some polyhalite ores have silicates (such as quartz, etc.) or clastic rocks in addition to sodium chloride. Gangue minerals, and their content is more than 10%, these gangue minerals have a certain impact on the flotation of polyhalite
Although there have been related reports to extract polyhalite by positive flotation process, the technical routes adopted are all aimed at high-sodium polyhalite ore, and the gangue minerals therein are only sodium chloride; There is no report on the development and utilization of polyhalite mines of gangue minerals such as sodium chloride and detrital salts. How to develop and utilize polyhalite mines in this polyhalite mines containing sodium chloride and silicate gangue minerals Help to improve the actual value of polyhalite development and utilization

Method used

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  • Method for extracting polyhalite from polyhalite ore containing gangue mineral
  • Method for extracting polyhalite from polyhalite ore containing gangue mineral
  • Method for extracting polyhalite from polyhalite ore containing gangue mineral

Examples

Experimental program
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Effect test

Embodiment 1

[0058] In this embodiment, first, the low-grade polyhalite ore containing gangue minerals such as silicate, detrital salt, and halite is ground to -200 mesh (-0.074mm) and accounts for 80.26 wt%. For rod milling, sodium metaphosphate is added as a dispersant according to the addition amount of 60g / 1t polyhalite ore, the mass concentration of ore grinding is 55%, and the grinding medium is saturated mother liquor to obtain ore abrasive slurry.

[0059] The main components of the low-grade polyhalite ore in this example are shown in Table 1.

[0060] Table 1 Main components of low-grade polyhalite ore

[0061]

[0062] The main components of the saturated mother liquor used as the grinding medium in this embodiment are shown in Table 2.

[0063] The main components of the saturated mother liquor of table 2 grinding media

[0064]

[0065] Then, add adjuster and flocculant to the ore abrasive slurry, and mix uniformly to obtain flotation raw material.

[0066] In this ex...

Embodiment 2

[0090] In this embodiment, first, the low-grade polyhalite ore containing gangue minerals such as silicate, detrital salt, and halite is ground to -200 mesh (-0.074mm) and accounts for 75.33 wt%. For rod milling, sodium metaphosphate is added as a dispersant according to the addition amount of 90g / 1t polyhalite ore, the mass concentration of ore grinding is 50%, and the grinding medium is saturated mother liquor to obtain ore abrasive slurry.

[0091] The low-grade polyhalite ore of this embodiment is the same as that of Embodiment 1, as shown in Table 1.

[0092] The main components of the saturated mother liquor used as the grinding medium in this embodiment are shown in Table 6.

[0093] The main components of the saturated mother liquor of table 6 grinding media

[0094]

[0095] Then, add adjuster and flocculant to the ore abrasive slurry, and mix uniformly to obtain flotation raw material.

[0096] In this example, the adjusting agent is sodium hexadecylsulfonate, t...

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Abstract

The invention discloses a method for extracting polyhalite from polyhalite ore containing gangue mineral. The method comprises the steps that firstly, polyhalite ore containing gangue minerals containing halite and silicate and / or scrap salt is ground, a dispersing agent and ore grinding mother liquor are added, and ore grinding slurry is obtained; secondly, an adjusting agent and a flocculating agent are added in the ore grinding slurry, and a flotation raw material is obtained; thirdly, the flotation raw material is subjected to roughing in flotation mother liquor, and a selected raw material and a scavenging raw material are obtained; fourthly, the selected raw material is sequentially subjected to primary selection and secondary selection, secondary selected concentrates are obtained,the scavenging raw material is subjected to scavenging, and scavenging tailings are obtained; and fifthly, the flotation mother liquor and washing mother liquor are mixed to serve as a washing medium,solid-liquid separation is conducted after the secondary selected concentrates are washed, and polyhalite products are obtained. The method is suitable for separating and extracting the polyhalite from the polyhalite ore containing gangue minerals containing the silicate and / or the scrap salt and the like, and a technical scheme for utilizing the polyhalite in other types of polyhalite ore is further provided.

Description

technical field [0001] The invention belongs to the technical field of ore separation and extraction, and specifically relates to a method for extracting polyhalite from polyhalite ore containing gangue minerals. Background technique [0002] Polyhalite (K 2 SO 4 2CaSO 4 · MgSO 4 2H 2 O) Potassium (in K 2 The O content) is as high as 15.64%, and it has been recognized as an ore with comprehensive utilization value of potassium, magnesium and sulfur. Extract effective potassium, magnesium, sulfur, calcium and other components from polyhalite ore to form potassium sulfate, potassium magnesium sulfate fertilizer, magnesium sulfate, gypsum and other agricultural and industrial products. Polyhalites are found in many ancient and modern salt deposits in the world, and are widely distributed in the Tertiary and Quaternary salt lake deposits in my country, such as in the Qaidam Basin (Dayan Beach, Dalang Beach, Chaerhan Salt Lake), the Tertiary saline system in the Sichuan Bas...

Claims

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Application Information

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IPC IPC(8): B03B7/00B03B9/00B03D1/018B03D3/06B03D101/02B03D103/02B03D103/10
CPCB03B7/00B03B9/00B03D1/018B03D3/06B03D2201/002B03D2201/005B03D2201/007B03D2201/02B03D2203/04B03D2203/10
Inventor 程怀德海擎宇张西营唐启亮李俊
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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