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Method for preparing potassium magnesium sulfate fertilizer, potassium chloride and potassium sulfate from sulfate type carnallite

A technology of potassium and magnesium sulfate fertilizer and sulfate type, which is applied in the fields of alkali metal sulfite/sulfite, chemical instruments and methods, potash fertilizer, etc., and can solve the problem of carnallite being abandoned, having no flotation capacity, and reducing potassium yield. efficiency and other issues, to achieve the effect of simple process flow, easy promotion and implementation, and avoid mutual influence

Active Publication Date: 2022-08-02
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

In the conversion process of only adding fresh water, magnesium chloride phases such as carnallite and bischofite interact with sulfate phases such as kabeinite and epsomite, greatly reducing the yield of potassium in the conversion process
At the same time, the introduced flotation technology has almost no flotation capacity for carnallite, bischofolite and other phases, which can easily cause the risk of carnallite staying in the tailings and being abandoned, resulting in the loss of potassium resources

Method used

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  • Method for preparing potassium magnesium sulfate fertilizer, potassium chloride and potassium sulfate from sulfate type carnallite
  • Method for preparing potassium magnesium sulfate fertilizer, potassium chloride and potassium sulfate from sulfate type carnallite
  • Method for preparing potassium magnesium sulfate fertilizer, potassium chloride and potassium sulfate from sulfate type carnallite

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Embodiment 1

[0076]

Embodiment 2

[0078]

Embodiment 3

[0080]

[0081] In addition, the inventors of the present application also carried out experiments with other raw materials, technological operations and technological conditions mentioned in this specification with reference to the foregoing examples, and all obtained satisfactory results.

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Abstract

The invention discloses a method for preparing potassium magnesium sulfate fertilizer, potassium chloride and potassium sulfate from sulfate type carnallite. The method includes: firstly performing flotation treatment on sulfate-type carnallite ore with an anionic flotation agent to obtain potassium-sulfur mixed salt concentrate and chloride-type tailings; Type tailings are subjected to reverse flotation treatment to obtain magnesium chloride type tailings and sodium chloride; finally, the magnesium chloride type tailings are washed, refined and decomposed to obtain potassium chloride. The invention adopts the double flotation separation technology to provide the raw material basis for the efficient production of potassium chloride and potassium-magnesium sulfate fertilizer products at the same time; at the same time, the technology of "reverse flotation-washing clematite-decomposition" is used to successively remove the chloride type tail The sodium chloride and magnesium chloride in the ore are conducive to obtaining carnallite concentrate and efficiently producing high-grade potassium chloride products. The process of the invention is simple, and only the flotation technology is used to realize the separation of different minerals, which is convenient for the popularization and implementation of the technology.

Description

technical field [0001] The invention belongs to the technical field of inorganic salt industry, and in particular relates to a method for preparing potassium magnesium sulfate fertilizer, potassium chloride and potassium sulfate from sulfate-type carnallite. Background technique [0002] Potassium fertilizer is the basic material for the stable growth of food production, which can effectively improve the quality of agricultural products and improve the resistance of crops. It is one of the nutrients necessary for the growth of crops. With the reduction of arable land and the continuous growth of population, the large-scale development of potassium resources and the improvement of potassium fertilizer yield are of great significance to food security. [0003] The main types of potash fertilizers are potassium chloride fertilizer, accounting for more than 90% of the total potash fertilizer; there are also sulfate type (potassium sulfate, potassium sulfate and magnesium fertili...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01D3/08C01D5/00C05D11/00
CPCC01D3/08C01D5/00C05D1/04C01P2006/80C05D5/00C05D9/00
Inventor 王敏时历杰
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI