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Process for the selective flotation of kainite from mineral mixtures using sulfated fatty acids as the collector reagent

A technology of kainite and mixture, which is applied in the field of selective flotation of kainite in crystal suspension, and can solve problems such as unreported mineral phase analysis

Inactive Publication Date: 2017-09-26
德国钾盐集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, the authors were only able to determine the K 2 SO 4 and MgSO 4 without reporting any analysis of the mineral phase in the foam composition whereby any sulfates (e.g. langbeinite, langbeinite) may be present in the foam

Method used

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  • Process for the selective flotation of kainite from mineral mixtures using sulfated fatty acids as the collector reagent
  • Process for the selective flotation of kainite from mineral mixtures using sulfated fatty acids as the collector reagent
  • Process for the selective flotation of kainite from mineral mixtures using sulfated fatty acids as the collector reagent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1 describes a laboratory scale separation test and Example 2 describes a production scale separation test. In the examples, the amount of collector used, the amount of frother and the temperature varied with the test conditions.

[0029]Unlike the common prior art process of converting langbeinite to langbeinite prior to flotation, the main component of the mixture (about 40% to 60% langbeinite) is here passed through the froth part (concentrated) Direct extraction, while potash and rock salts are retained in the residue fraction / residue mineral fraction.

[0030] Example 1

[0031] Example 1 shows trials of the selective flotation of kainite from evaporation crystals with the combination of regulators used according to the invention in the corresponding flotation solutions / mother liquors. Sodium salts of sulfated fatty acids were used as kainite collectors and glycol ethers were used as frothers (trade name Ashland Amerfloc ). Experiments were performed at...

Embodiment 2

[0036] Below, the efficiency of the regulator combination was tested on a production scale during continuous operation. In this case, the crystallisate suspension obtained by evaporation of the solution and comprising the mineral phases of halite, langbeinite and halite is treated by flotation according to the invention in a corresponding flotation solution / mother liquor.

[0037] The crystalline suspensions with a solids content of 20 wt% and 17 wt%, respectively, were adjusted according to the invention and fed continuously to the pneumatic flotation system. Flotation is performed in two steps using a series of cells.

[0038] Sodium salts of sulfated fatty acids were used as kainite collectors and glycol ethers were used as frothers (trade name Ashland Amerfloc ).

[0039] The concentrations of modifiers used were:

[0040] Sodium salt of sulfated fatty acid

[0041] o Trials 1A to 1C = 325g / t 固体 ;2A to 2B=445g / t 固体

[0042] foaming agent

[0043] o Trials 1A t...

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PUM

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Abstract

The invention relates to a process for the selective flotation of kainite from ground potash ores or, for example, from crystallized salt mixtures which are obtained by evaporation processes and can contain other minerals in addition to kainite, such as halite, sylvite and other salt minerals, in order to produce a kainite concentrate fraction and a residue fraction. The separation process is characterized in that the ground or crystallized salt mixture in the form of a crystallizate suspension is intensively mixed with a conditioning-agent combination consisting of a sulfated fatty acid or the alkali salt thereof as the collector reagent and of a known flotation foaming agent (e.g. glycol ethers, monovalent aliphatic alcohols, terpene alcohols, polyglycol ethers etc.) and is subsequently separated into a kainite concentrate fraction and a residue fraction by agitator flotation or pneumatic flotation. The fractions that are formed can be further treated in downstream processes. This process allows an industrial-scale treatment for the selective recovery of kainite from mineral mixtures with the aid of the flotation process.

Description

technical field [0001] The present invention relates to the selective use of sulfated fatty acids or their alkali metal salts as collectors and frothers (combinations of modifiers) known for flotation processes from crude potassium salts or crystalline suspensions obtained, for example, from evaporation processes A method for flotation of langbeinite, the feedstock containing, in addition to langbeinite, minerals such as halite, kelpite and other salt minerals. Background technique [0002] According to the state of knowledge to date, crude potassium salts, as mixed salts comprising a considerable proportion of langbeinite, can only be handled with great difficulty. Currently, there is no industrial-scale process for the selective extraction of langbeinite from mineral mixtures by flotation. However, selective extraction of langbeinite would enable economical further partial processing of langbeinite into a potassium sulfate product and thus a commercially available product...

Claims

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Application Information

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IPC IPC(8): B03D1/012B03D101/02B03D103/10
CPCB03D1/012B03D2201/02B03D2203/10C01D5/12C01D5/16B03D1/008B03D1/02B03D2201/04
Inventor U·瓦克斯穆特J·布罗德
Owner 德国钾盐集团股份有限公司