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Method for treating potassium mixed salt ore by adopting dense media and cold crystallization direct flotation

A potassium mixed salt ore, positive flotation technology, applied in chemical instruments and methods, wet separation, solid separation and other directions, can solve the problems of low recovery rate, fine product particle size, difficult to filter, etc., to reduce the consumption of chemicals, reduce Adverse effects, effects of reducing ore feeding

Inactive Publication Date: 2020-12-01
BLUESTAR LEHIGH ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In my country, artificial carnallite mines are mainly sun-dried in salt fields, mainly distributed in the Qinghai area. After sun-dried, the sodium chloride content in the raw ore is low, below 20%, and the reverse flotation cold crystallization process is mainly used. However, there are both carnallite and potassium halite deposits in the underground potassium-bearing deposits in some foreign countries. Due to the high content of sodium chloride in these deposits, the content reaches more than 40%, which cannot meet the direct application of reverse flotation cold crystallization process. Only the cold decomposition positive flotation process and the cold crystallization positive flotation process can be used. The cold decomposition positive flotation process has the disadvantages of low potassium chloride grade, fine product particle size, low recovery rate, and difficult filtration. The cold crystallization process has the disadvantages of cold The crystallization crystallizer has the disadvantages of large equipment, low recovery rate, complicated crystallizer operation and control

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1, a kind of method adopting dense medium and cold crystallization forward flotation to process potassium mixed salt type ore:

[0037] In this embodiment, the main components of potassium mixed salt type ore contain KCl 20.40%, NaCl 42.83%, MgCl 2 17.32%, CaSO 4 0.27%, water insoluble matter 0.78%. The steps are as follows:

[0038] (1) Potassium mixed salt ore is crushed to less than 20mm, and then sent to the screening operation, divided into two grades of coarse and fine, the linear screen is selected for the classification operation, and the screen hole size is controlled to 1mm.

[0039](2) The coarse-grained ore is fed into the three-product dense medium cyclone for separation, and the products on the screen are fed into the gravity separation operation, and the carnallite coarse concentrate, potassium mixed salt ore, and potash salt ore are separated Three products, the dense medium suspension is prepared by adding water to magnetite with a grade ...

Embodiment 2

[0051] Embodiment 2, a kind of method adopting heavy medium and cold crystallization forward flotation to process potassium mixed salt type ore:

[0052] In this embodiment, the main components of potassium mixed salt type ore contain KCl 23.03%, NaCl 56.66%, MgCl 2 8.85%, CaSO 4 0.32%, water insoluble matter 0.60%. The steps are as follows:

[0053] (1) Potassium mixed salt ore is crushed to less than 25mm, and then sent to the screening operation, divided into two grades of coarse and fine, the linear screen is selected for the classification operation, and the screen hole size is controlled to 4mm.

[0054] (2) The coarse-grained ore is fed into the three-product dense medium cyclone for separation, and the products on the screen are fed into the gravity separation operation, and the carnallite coarse concentrate, potassium mixed salt ore, and potash salt ore are separated Three products, the dense medium suspension is prepared by adding water to ferrosilicon, and the d...

Embodiment 3

[0066] Embodiment 3, a kind of method adopting heavy medium and cold crystallization forward flotation to process potassium mixed salt type ore:

[0067] In this embodiment, the main components of potassium mixed salt type ore contain KCl 21.71%, NaCl 49.75%, MgCl 2 13.08%, CaSO 4 0.30%, water insoluble matter 0.69%. , the steps are as follows:

[0068] (1) Potassium mixed-salt ore is crushed to less than 15mm, and then sent to the screening operation, which is divided into two grades of coarse and fine. For the classification operation, a curved sieve is selected, and the sieve hole size is controlled to 2mm.

[0069] (2) The coarse-grained ore is fed into the three-product dense medium cyclone for separation, and the products on the screen are fed into the gravity separation operation, and the carnallite coarse concentrate, potassium mixed salt ore, and potash salt ore are separated three products;

[0070] (2) The coarse-grained ore is fed into the three-product dense ...

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Abstract

The invention relates to a method for treating potassium mixed salt ore by adopting dense media and cold crystallization direct flotation, and belongs to the technical field of mineral processing. Themethod comprises the following steps of crushing the potassium mixed salt type ore to below 10-30mm, dividing the crushed potassium mixed salt type ore into a coarse fraction and a fine fraction, andsorting the coarse fraction ore by adopting a dense medium cyclone to obtain three products, namely carnallite rough concentrate, potassium mixed salt ore and sylvine ore; carrying out cold decomposition crystallization or reverse flotation-cold decomposition crystallization on the carnallite rough concentrate, and refining to obtain KCl concentrate; and adopting the cold decomposition crystallization-direct flotation process in the potassium mixed salt ore and the fine-grained materials, adopting a direct flotation process in the sylvine ore, and then refining to obtain KCl concentrate. According to the method, the potassium mixed salt raw ore is divided into the low-sodium carnallite ore, the carnallite and sylvine mixed ore and the sylvine ore through three-product dense medium separation in advance, then different treatment processes are adopted for the three different ores, and the method has the advantages of being high in process adaptability, low in energy consumption, large in final KCl product granularity, high in recovery rate and the like.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, and in particular relates to a method for treating potassium mixed-salt type ore by adopting dense medium and cold crystallization forward flotation technology. Background technique [0002] Potassium salt is the name of potassium-containing minerals, which can be divided into soluble potassium salt minerals and insoluble potassium-containing aluminosilicate minerals according to their solubility. my country's potash resources are mainly soluble potash resources, mainly liquid brine deposits, mainly distributed in the Qaidam Basin of Qinghai and the Lop Nur Salt Lake region of Xinjiang, and mainly adopt the reverse flotation-cold crystallization process; potash fertilizer production in Russia and Canada Large countries mainly use solid potash salt ore as raw material, and adopt the positive flotation process to produce coarse-grained potassium chloride. In some countries, the potassium ...

Claims

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Application Information

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IPC IPC(8): B03B9/00B03B5/44
CPCB03B5/442B03B5/447B03B9/00
Inventor 李丰张红茹田鹏杰
Owner BLUESTAR LEHIGH ENG INST CO LTD
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