| 摘要 |
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. |
