Process for the treatment of langbeinite and anhydrite containing kieserite concentrates

摘要

A process for after-purifying a kieserite mixture pre-concentrated electrostatically across a number of stages is characterized in that the outside air used in the after purification stage is adjusted by dehumidification in a conventional dehumidification plant to an absolute moisture of 4.5 g/m3, and the kieserite mixture to be separated by triboelectrically charging with said air at a temperature of below 40 DEG C.