Molecules, Vol. 29, Pages 1490: Activation Mechanism of Fe2+ in Pyrrhotite Flotation: Microflotation and DFT Calculations

Molecules, Vol. 29, Pages 1490: Activation Mechanism of Fe2+ in Pyrrhotite Flotation: Microflotation and DFT Calculations
Molecules doi: 10.3390/molecules29071490
Authors:
Qiang Song
Xiong Tong
Pulin Dai
Xian Xie
Ruiqi Xie
Peiqiang Fan
Yuanlin Ma
Hang Chen

In industrial manufacturing, pyrrhotite(Fe1−xS), once depressed, is commonly activated for flotation. However, the replacement of CuSO4 is necessary due to the need for exact control over the dosage during the activation of pyrrhotite, which can pose challenges in industrial settings. This research introduces the use of FeSO4 for the first time to efficiently activate pyrrhotite. The impact of two different activators on pyrrhotite was examined through microflotation experiments and density functional theory (DFT) calculations. Microflotation experiments confirmed that as the CuSO4 dosage increased from 0 to 8 × 10−4 mol/L, the recovery of pyrrhotite initially increased slightly from 71.27% to 87.65% but then sharply decreased to 16.47%. Conversely, when the FeSO4 dosage was increased from 0 to 8 × 10−4 mol/L, pyrrhotite’s recovery rose from 71.27% to 82.37%. These results indicate a higher sensitivity of CuSO4 to dosage variations, suggesting that minor alterations in dosage can significantly impact its efficacy under certain experimental conditions. In contrast, FeSO4 might demonstrate reduced sensitivity to changes i...

Source: Molecules - March 27, 2024 Category: Chemistry Authors: Qiang Song Xiong Tong Pulin Dai Xian Xie Ruiqi Xie Peiqiang Fan Yuanlin Ma Hang Chen Tags: Article Source Type: research