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Method and system for preparing potassium chloride from carnallite raw ore

A technology of carnallite and potassium chloride, which is applied in the fields of alkali metal chloride, solid separation, grain processing, etc., can solve the problems of low recovery rate of potassium chloride, achieve good crystallization effect, increase recovery rate, and reduce loss Effect

Active Publication Date: 2021-12-07
QINGHAI SALT LAKE IND
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method and system for producing potassium chloride from carnallite raw ore, which is used to solve the problem of potassium chloride caused by direct discharge of oversize and crystallizer overflow liquid to the tailing salt pond in the existing potash fertilizer production method. The problem of low recovery

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  • Method and system for preparing potassium chloride from carnallite raw ore

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Embodiment Construction

[0029] The present invention provides many applicable inventive concepts that can be embodied in numerous specific contexts. The specific examples described in the following embodiments of the present invention are only used as illustrations of specific embodiments of the present invention, and are not intended to limit the scope of the present invention.

[0030] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0031] like figure 1 as shown, figure 1 It is a process flow diagram of a method for producing potassium chloride from carnallite raw ore according to a preferred embodiment provided by the present invention.

[0032] The present embodiment provides a kind of method for producing potassium chloride by carnallite raw ore, comprises the following steps:

[0033] In the first step, the carnallite raw ore slurry is carried out in the first flotation device 2 for reverse flotation to generate ...

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Abstract

The invention discloses a method for preparing potassium chloride from carnallite raw ore. The method comprises the following steps of generating low-sodium carnallite slurry in a first flotation device from carnallite raw ore slurry; feeding the low-sodium carnallite slurry into a first screening device to obtain a first oversize product and a first undersize product; feeding the first oversize product into a crushing device, and returning the crushed first oversize product to the first flotation device; containing crystallizer underflow and crystallizer overflow liquid are from the first screen underflow in a crystallizer; conveying the bottom flow of the crystallizer into a second screening device to obtain a second oversize product and a second undersize product, conveying the second oversize product into the crushing device, and conveying the second undersize product into a fourth concentrating device for producing potassium chloride; and generating crude potassium slurry in the second flotation device form the overflow liquid of the crystallizer, and feeding the crude potassium slurry into the fourth concentrating device for producing potassium chloride. According to the method, the low-sodium carnallite ore pulp is subjected to circulating screening-crushing treatment, so that the particle size of the first screen underflow is uniform and stable, the crystallizer overflow liquid is subjected to reverse flotation again, and the potassium resource is recycled.

Description

technical field [0001] The invention relates to the technical field of potassium chloride production, in particular to a method and system for preparing potassium chloride from carnallite raw ore. Background technique [0002] Potassium resources in China widely exist in remote areas such as Qinghai, among which the reserves in Qinghai account for more than 50% of the national reserves. The representative resources are salt lake resources, and the salt lake resources mainly include sedimentary resources and brine resources. Salt lake brine belongs to liquid chloride minerals Resources, rich in various components. Salt lake brine uses rich carnallite ore to process potassium chloride to produce potassium fertilizer. Potassium fertilizer is one of the three major chemical fertilizers of nitrogen and phosphorus and potassium. The life process plays a significant role, which is conducive to improving the water absorption in plants, the synthesis and transfer of sugars, and the u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B9/00B02C21/00B03D1/14C01D3/08
CPCB03B9/00B02C21/00B03D1/14C01D3/08
Inventor 刘海亭唐德国王江龙郝红军翟志强赵玉峰雷凯华盖明辉孟浩韩生奎赵宁谭龙石卉赵圣马军
Owner QINGHAI SALT LAKE IND
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