Method for treating a salt solution using multistage separation processes, and treatment system for this purpose

A technology for processing systems and salt solutions, applied in separation methods, wet separation, solid separation, etc., can solve the problems of high cost, high kainite content, high equipment cost and complexity, and achieve burden reduction and obvious technology , reduce the effect of using modulators

Inactive Publication Date: 2020-01-03
德国钾盐集团股份有限公司
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Problems solved by technology

This results in a higher cost for this mode of operation due to the relatively large amount of modulator used, and the equipment required is also much more costly and complex
[0011] Although good langbeinite selectivities for flotation treatments can be achieved, single stage flotation is often not sufficient to ensure satisfactory derived values ​​from the feed material, especially due to the high langbeinite content in the evaporated crystallization

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  • Method for treating a salt solution using multistage separation processes, and treatment system for this purpose
  • Method for treating a salt solution using multistage separation processes, and treatment system for this purpose
  • Method for treating a salt solution using multistage separation processes, and treatment system for this purpose

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Embodiment Construction

[0029] figure 1 and figure 2 A schematic diagram of a treatment system 100 is shown, wherein the treatment system 100 comprises an evaporation plant 10, which is supplied with a brine 1 formed in an upstream operation, and from which can be obtained materials including langbeinite, halite and A crystalline suspension 11 of the potassium salt, and then at least partially removing kainite from the crystalline suspension 11.

[0030] In this case, the crystalline suspension 11 is first supplied to a pre-classification device 12 in which the langbeinite was removed, thereby obtaining langbeinite-reduced fraction 13. Subsequently, the langbeinite-reduced fraction 13 is transferred to a flotation unit 14 in which the remaining proportion of langbeinite is removed, in particular mainly removed, from the langbeinite-reduced fraction 13 .

[0031] The pre-classification device 12 comprises, for example, a sorting screw, in which case langbeinite is removed from the crystalline susp...

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Abstract

The invention relates to a method for treating a salt solution (1) using a treatment system (100). The treatment system (100) has an evaporation device (10) to which the salt solution (1) produced ina preliminary process is supplied. A crystallizate suspension (11) having kainite, halite, and sylvite is obtained from the evaporation device (10), and the kainite is then separated from the crystallizate suspension (11). The method for separating the kainite from the crystallizate suspension (11) has at least the following steps: - supplying the crystallizate suspension (11) to a pre-grading device (12) in which kainite is partly separated from the crystallizate suspension (11) by means of a pre-separation process based on the particle size of the kainite, thereby obtaining a kainite-reducedfraction (13), and transferring the kainite-reduced fraction (13) to a flotation device (14) in which the remaining content of kainite is separated from the kainite-reduced fraction (13).

Description

technical field [0001] The present invention relates to a method for treating a brine solution with a treatment system, wherein the treatment system comprises an evaporation device supplied with a brine solution formed in an upstream operation and from which a langbeinite-containing , a crystalline suspension of halite and sylvite, and then at least partially removing langbeinite from the crystalline suspension. Background technique [0002] According to current knowledge, it is difficult to handle crude potash, which as a mixed salt includes a large proportion of kainite. There is currently no industrial process for the selective extraction of langbeinite from mineral mixtures by the flotation process. However, the selective extraction of langbeinite allows the beneficial further processing of the langbeinite fraction into a potassium sulfate product, which represents a salable product. However, langbeinite can also be used directly, for example, as a fertilizer or as a t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/02C01D5/00
CPCB03D1/02B03D2203/10C01D5/12B01D9/0018B01D21/265B01D21/267B03B5/62B07B13/04
Inventor J·布罗德U·瓦克斯穆特A·林格
Owner 德国钾盐集团股份有限公司
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