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Process for extracting potassium chloride by coarse flotation of primary sylvine ores

A technology of potassium halite and potassium chloride, which is applied in the technical field of extracting potassium chloride by coarse-grained flotation of primary potash halite, which can solve the problem of small grinding machine processing capacity, small flotation feed particle size, and product Filter high moisture and other problems to achieve the effect of easy large-scale industrial production, low energy consumption and low production cost

Active Publication Date: 2013-06-12
BLUESTAR LEHIGH ENG INST CO LTD +1
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  • Abstract
  • Description
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Problems solved by technology

However, in the current domestic production of potassium chloride by flotation, the grinding particle size is generally finer, and the particle size of the flotation feed material is small, usually ≤0.3mm, which leads to large grinding energy consumption, small grinding machine processing capacity, and product particle size. Fine, high product filtration moisture and high drying energy consumption, so coarse material flotation will be an important method to solve these problems

Method used

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  • Process for extracting potassium chloride by coarse flotation of primary sylvine ores

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Embodiment 1

[0017] Embodiment 1, with reference to figure 1 , a technique for extracting Potassium Chloride by coarse-grained flotation of primary potash halite, the steps of which are as follows:

[0018] ⑴ Crushing: Crushing the solid potash salt ore to a particle size below 10mm;

[0019] (2) Grinding: add the material obtained in step (1) into potassium rock salt saturated brine and then send it to a rod mill for coarse grinding, control the grinding mass concentration to 50%~60%, and the grinding particle size to 1-2mm;

[0020] (3) Desliming: send the material obtained in step (2) into the desliming equipment for desliming and remove insoluble slime;

[0021] (4) Flotation: add the deslimed material obtained in step (3) into potassium rock salt saturated brine, adjust the pulp to 20%~30% ore pulp mass concentration, send it to the coarse material flotation machine for flotation, and add the ore slime successively in the rough selection Inhibitors, potassium chloride collectors, au...

Embodiment 2

[0025] Example 2, a process experiment for extracting potassium chloride by coarse-grained flotation of primary potassium halite ore: (1) crushing potassium halite (containing KCl 31.93%, insolubles 3.5%) to below 10mm, (2) crushing Finally, the raw ore is slurried with saturated brine to a concentration of 50%, and sent to a rod mill for grinding to a thickness below 1.0mm; (3) The ore pulp after grinding is sent to a hydrocyclone for desliming to remove insoluble slime. (4) Send the deslimed ore pulp to the special flotation machine for coarse grain flotation for flotation, control the concentration of the ore pulp to 25%, and add collector octadecyl primary amine 50g / t, auxiliary collector Catalytic diesel oil 20 g / t, slime inhibitor starch 200 g / t, foaming agent terpineol oil 25 g / t, after a rough separation and three separations to obtain the flotation concentrate; (5) Add the flotation concentrate to other Wash the concentrate with 12% water; (6) filter and dry the washe...

Embodiment 3

[0026] Example 3, a process experiment for extracting potassium chloride by coarse-grained flotation of primary potassium halite ore: (1) crushing potassium halite (containing KCl 26.5%, insolubles 4.20%) to below 10 mm, (2) crushing Finally, the raw ore is slurried with saturated brine to a concentration of 60%, and sent to a rod mill for grinding to a thickness below 1.2mm; (3) The ore pulp after grinding is sent to a hydrocyclone for desliming to remove insoluble slime. ⑷ Send the deslimed ore pulp to a special flotation machine for coarse-grain flotation for flotation, control the concentration of the ore pulp to 20%, and add collector octadecyl primary amine 40g / t, auxiliary collector catalyst Diesel oil 30 g / t, slime inhibitor starch 300 g / t, foaming agent terpineol oil 15 g / t, after a rough separation and three separations to obtain flotation concentrates; (5) Add flotation concentrates to its mass 18% water for concentrate washing; (6) Filter and dry the washed concent...

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Abstract

The invention relates to a process for extracting potassium chloride by the coarse flotation of primary sylvine ores. The process comprises the following steps: (1) crushing: the sylvine ores are crushed to be smaller than 10mm; (2) ore grinding: coarse ore grinding is carried out on the crushed ores by a rod mill; (3) desliming: sylvine ore pulp after ore grinding is sent into a desliming device to remove insoluble slime; (4) flotation: under normal pressure and temperature, the sylvine ore pulp after desliming is floated in saturated bittern, a slime inhibitor, a sylvine collecting agent alkyl primary amine, a foaming agent and a nonpolar oil chemical are added, and one time of rougher flotation and two to four times of fine flotation are adopted for the flotation process; (5) concentrate washing: fresh water is added into obtained flotation concentrate for washing; and (6) filtration and drying: the washed concentrate is filtered and dried to obtain the potassium chloride. The process disclosed by the invention has simple procedures, is small in energy consumption, low in production cost, low in investment and high in recovery rate, and facilitates large-scale industrial production, and the KCl (potassium chloride) content of a KCl product is larger than or equal to 95%.

Description

technical field [0001] The invention relates to a process for extracting potassium chloride by using potash halite, in particular to a process for extracting potassium chloride by coarse flotation of primary potash halite. Background technique [0002] Potash halite is the main raw material for the production of potassium chloride, and its main impurity is sodium chloride. The processing methods of this kind of ore at home and abroad mainly include dissolution crystallization method and flotation method. [0003] The dissolution crystallization method utilizes the solubility difference of potassium chloride and sodium chloride at different temperatures to realize the separation of potassium chloride and sodium chloride. The advantages of this process are high product quality, coarse crystal grain size, no flotation agent, and easy deep processing. The disadvantages are complex process flow, serious corrosion of equipment, large investment, high energy consumption, and poor ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01D3/08
Inventor 张守祥林杰魏春城陈晓佳刘杰程干华刘毓
Owner BLUESTAR LEHIGH ENG INST CO LTD
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