Back to Search
Start Over
Influence and mechanism of Zn2+ on fluorite/calcite in sodium hexametaphosphate flotation system.
- Source :
- Physicochemical Problems of Mineral Processing; 2022, Vol. 58 Issue 6, p1-12, 12p
- Publication Year :
- 2022
-
Abstract
- Fluorite and calcite have similar surface properties and natural floatability, so their flotation separation has always been a problem faced by the beneficiation industry. The key to flotation separation is the choice of depressants. Sodium hexametaphosphate (SHMP) has a good effect on fluorite calcite selective inhibition. In this paper, the effects of Zn<superscript>2+</superscript> on the selective inhibition of SHMP in the flotation process of fluorite and calcite were studied through single mineral and artificial mixed mineral flotation experiments. Solution chemical calculation, X-ray photoelectron spectroscopy (XPS), Fourier Transform Infrared spectroscopy (FT-IR) and Time of Flight Secondary Ion Mass Spectrometry (ToF-SIMS) analyses investigated the mechanism of action of Zn<superscript>2+</superscript>, which had the most significant negative effect on the selective inhibition of SHMP. The results show that the main components of SHMP inhibiting minerals are HPO<subscript>4</subscript><superscript>2-</superscript> and H<subscript>2</subscript>PO<subscript>4</subscript><superscript>-</superscript>, which can react with Ca active sites on the mineral surface to form hydrophilic Ca(H<subscript>2</subscript>PO<subscript>4</subscript>)2 and CaHPO<subscript>4</subscript>, while Zn<superscript>2+</superscript> The presence of HPO<subscript>4</subscript><superscript>2-</superscript> in solution resulted in the formation of stable ZnHPO<subscript>4</subscript> complexes, thereby weakening the inhibitory effect of SHMP on minerals. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 16431049
- Volume :
- 58
- Issue :
- 6
- Database :
- Complementary Index
- Journal :
- Physicochemical Problems of Mineral Processing
- Publication Type :
- Academic Journal
- Accession number :
- 160204407
- Full Text :
- https://doi.org/10.37190/ppmp/151676