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Floatation process of preparing potassium sulfate

A technology of potassium sulfate and flotation method, which is applied in flotation, bisulphate preparation, chemical instruments and methods, etc. It can solve the problems of restricted development, high cost, poor sales of by-product sodium chloride, etc., and achieve good economic prospects , Low manufacturing cost, cost reduction effect

Inactive Publication Date: 2006-10-25
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

At present, the utilization of Glauber’s salt resources is limited to the production of anhydrous salt-Yuanming powder for sale, and the deep processing and utilization is still blank. Although it is a mature technology to produce potassium sulfate with Glauber’s salt and potassium chloride as raw materials, due to the raw materials of potassium chloride and Glauber’s salt The cost of raw materials is high, and the by-product sodium chloride is not sold well, which limits the development of this process

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  • Floatation process of preparing potassium sulfate
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Embodiment Construction

[0022] specific implementation

[0023] Combine below figure 1 The invention is further described in detail with the example of producing potassium sulfate from carnallite and Wutumeiren Glauberite in Qinghai Chaerhan Salt Lake as raw materials.

[0024] Take 100g of Glauber's salt with a content of 95%, and dissolve 130g of Glauber's salt with 20-80°C hot liquid. Add 600 g of carnallite (wherein the potassium content is 8-12%) to 230 g of the filtered clear liquid and convert at 20-60 ° C for 20-150 min, and add 0.5 ml of mixed flotation agent to the converted slurry for flotation 2 -50min, obtain the flotation concentrate of 250g (wherein sodium chloride content 60-100%), and obtain the flotation tailings of 250g (wherein sodium chloride content 4-10%), this flotation tailings through solid-liquid Isolate and obtain soft potash mixed salt ore 250g, then add 20-60 ℃ hot water 150g in soft potash mixed salt ore, transform 20-150min, transform and complete slurry separation, ...

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Abstract

The invention relates to a method for preparing potassium sulfate by using salt lake mirabilite and carnallite resources. The method comprises the following steps: first dissolving mirabilite to remove insoluble matter, and then transforming mirabilite into carnallite at normal temperature to obtain soft potassium Magnesite mixed salt slurry; then add a mixed flotation agent into the slurry, stir evenly and then enter the flotation machine, after desalting and desliming by flotation, the flotation concentrate and tailings are obtained, and the flotation tailings are For high-grade langbeinite mixed salt ore, mix magnesia-vanadium mixed salt ore with water again, carry out secondary decomposition reaction in the reactor, and precipitate potassium sulfate product; flotation concentrate sodium chloride can be washed with water It is used as industrial salt; the process of the present invention is simple, the flotation process adopts a closed-circuit process, the whole process is operated at normal temperature and pressure, and there is no problem of three wastes. It is a good method for processing and producing potassium sulfate by using salt lake resources.

Description

technical field [0001] The invention relates to a method for preparing potassium sulfate, in particular to a method for preparing potassium sulfate by using the flotation method of mirabilite and carnallite resources. Background technique [0002] Qinghai is rich in chloride-type salt lake resources and sulfate-type salt lake resources. The chloride-type salt lake resources in Qinghai are mainly stored in the Chaerhan Salt Lake, of which the potassium salt reserves are about 150 million tons in terms of potassium chloride. In the process of chloride-type salt lake brine being exposed to the sun in salt fields, potassium is mainly precipitated in the form of carnallite, and then the carnallite is subjected to cold decomposition and flotation to realize the separation of potassium chloride and sodium chloride to obtain potassium chloride . The resource reserves of sulfate-type salt lakes in Qinghai are slightly larger than those of chloride-type salt lakes, and the distribut...

Claims

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Application Information

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IPC IPC(8): C01D5/00C01D5/12C01D3/04B03D1/00B03D1/004
Inventor 李海民程怀德张全有孟瑞英
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI