The Potential Role of Colloidal Silica as a Depressant in Scheelite Flotation
The Potential Role of Colloidal Silica as a Depressant in Scheelite Flotation
Kupka, N.; Babel, B. M.; Rudolph, M.
The main challenge in scheelite flotation lies in the contamination of the concentrate by other calcium-bearing minerals, mainly calcite. To remedy this problem, sodium silicate is frequently used as a depressant. According to the literature, one hypothesis for the mechanism of water glass consists in its absorption onto calcite through colloidal silica formation, preventing hydrophobization by the collector. This short communication presents research conducted on the direct use of colloidal silica as a depressant in scheelite flotation. Colloidal silica is shown to have an impact on scheelite flotation, especially by depressing silicates.
Keywords: scheelite flotation; colloidal silica; depressant
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Minerals 10(2020)2, 144
Online First (2020) DOI: 10.3390/min10020144
Cited 9 times in Scopus
Permalink: https://www.hzdr.de/publications/Publ-30806