Selective flocculation has long been suggested as a method for the treatment of ultra-fine particles typical of which are those produced in a de-sliming process ahead of flotation. In this paper the results of the coal de-mineralization, using synthetic polyacrylamide polymers, are presented. A prescreening test on the suitability of the polymers using Run-Of-Mine (R.O.M.) coal and artificial m...

Abstract A considerable amount of very fine particles can be found, e.g., stored in tailing ponds, and they include valuable or hazardous minerals that have the potential to recovered. Selective flocculation, i.e., formation larger aggregates from specific minerals, offers a promising approach improve recovery ultrafine particles. This study focuses on use new bio-based flocculation agent made ...

Precipitation of arsenic as As2S3 produces little waste sludge, has the potential for low chemical consumption and selective metal(loid) removal. In this study, removal from acidic (pH 2), metallurgical wastewater was tested in industrially relevant conditions. Sulfides added at a S:As molar ratio 2.5 5 resulted 99% 84% As(III) As(V). industrial containing 17% As(V) nearly instantaneous. For sy...

The mineral processing of friable iron ores usually generates ultrafine (smaller than 15 µm) particles, normally called slimes, which have a high grade and are disposed into tailings dam. traditional process techniques for ore do not work efficiently with ultrafines; however, selective flocculation is an alternative to concentrate that fraction. physical-chemical treatment slime was studied her...

Flocculation can be used in turbulent environments resulting in floc breakage due to shearing. The degree of re-flocculation relates directly to product quality and process efficiency. This study aimed at looking for alternatives to improve the re-flocculation ability of aggregates when polyelectrolytes (PEL) are used as flocculation agents. Moreover, because branched PEL have proved previously...