Developing Effective Separation of Feldspar and Quartz While Recycling Tailwater by HF Pretreatment
The effect of hydrofluoric acid (HF) pretreatment on flotation of feldspar and quartz using dodecylamine (DDA) as collector was investigated by micro-flotation, zeta potential, pyrene fluorescence spectroscopy, attenuated total reflection flourier transformed infrared spectroscopy (ATR-FTIR), scanni...
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doaj-bce656f7c4d14587ba34df5ef81b03162020-11-25T00:51:36ZengMDPI AGMinerals2075-163X2018-04-018414910.3390/min8040149min8040149Developing Effective Separation of Feldspar and Quartz While Recycling Tailwater by HF PretreatmentWeiqing Wang0Jinyao Cong1Jie Deng2Xiaoqing Weng3Yiming Lin4Yang Huang5Tiefeng Peng6Key Laboratory of Ministry of Education for Solid Waste Treatment and Resource Recycle, Southwest University of Science and Technology, Mianyang 621010, ChinaKey Laboratory of Ministry of Education for Solid Waste Treatment and Resource Recycle, Southwest University of Science and Technology, Mianyang 621010, ChinaResearch Center of Multipurpose Utilization of Metal Mineral Resources of China Geological Survey, Chengdu 610000, ChinaSchool of Resource and Civil Engineering, Wuhan Institute of Technology, Wuhan 430073, ChinaKey Laboratory of Ministry of Education for Solid Waste Treatment and Resource Recycle, Southwest University of Science and Technology, Mianyang 621010, ChinaKey Laboratory of Ministry of Education for Solid Waste Treatment and Resource Recycle, Southwest University of Science and Technology, Mianyang 621010, ChinaKey Laboratory of Ministry of Education for Solid Waste Treatment and Resource Recycle, Southwest University of Science and Technology, Mianyang 621010, ChinaThe effect of hydrofluoric acid (HF) pretreatment on flotation of feldspar and quartz using dodecylamine (DDA) as collector was investigated by micro-flotation, zeta potential, pyrene fluorescence spectroscopy, attenuated total reflection flourier transformed infrared spectroscopy (ATR-FTIR), scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS) and bench scale flotation. The micro-flotation tests revealed that there was little difference in the flotation of feldspar and quartz at pH 2, using H2SO4 as pH regulator. After HF pretreatment, the floatability of feldspar significantly increased while the floatability of quartz showed no change. HF pretreatment resulted in leaching of SiO2 and enrichment of Na, K and Al on the feldspar surface. Consequently, the negative surface charge of feldspar increased at pH 2, which allowed for the flotation separation of the feasible minerals. This took place via an increased electrostatic adsorption between DDA and Na, K, Al on the feldspar surface, which effectively increased its hydrophobicity and as a result, improved the floatability of feldspar. An alternative process which exhibited effective separation of quartz and feldspar while recycling the tailwater from the flotation was proposed.http://www.mdpi.com/2075-163X/8/4/149hydrofluoric acidflotationDDAATR-FTIR |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Weiqing Wang Jinyao Cong Jie Deng Xiaoqing Weng Yiming Lin Yang Huang Tiefeng Peng |
spellingShingle |
Weiqing Wang Jinyao Cong Jie Deng Xiaoqing Weng Yiming Lin Yang Huang Tiefeng Peng Developing Effective Separation of Feldspar and Quartz While Recycling Tailwater by HF Pretreatment Minerals hydrofluoric acid flotation DDA ATR-FTIR |
author_facet |
Weiqing Wang Jinyao Cong Jie Deng Xiaoqing Weng Yiming Lin Yang Huang Tiefeng Peng |
author_sort |
Weiqing Wang |
title |
Developing Effective Separation of Feldspar and Quartz While Recycling Tailwater by HF Pretreatment |
title_short |
Developing Effective Separation of Feldspar and Quartz While Recycling Tailwater by HF Pretreatment |
title_full |
Developing Effective Separation of Feldspar and Quartz While Recycling Tailwater by HF Pretreatment |
title_fullStr |
Developing Effective Separation of Feldspar and Quartz While Recycling Tailwater by HF Pretreatment |
title_full_unstemmed |
Developing Effective Separation of Feldspar and Quartz While Recycling Tailwater by HF Pretreatment |
title_sort |
developing effective separation of feldspar and quartz while recycling tailwater by hf pretreatment |
publisher |
MDPI AG |
series |
Minerals |
issn |
2075-163X |
publishDate |
2018-04-01 |
description |
The effect of hydrofluoric acid (HF) pretreatment on flotation of feldspar and quartz using dodecylamine (DDA) as collector was investigated by micro-flotation, zeta potential, pyrene fluorescence spectroscopy, attenuated total reflection flourier transformed infrared spectroscopy (ATR-FTIR), scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS) and bench scale flotation. The micro-flotation tests revealed that there was little difference in the flotation of feldspar and quartz at pH 2, using H2SO4 as pH regulator. After HF pretreatment, the floatability of feldspar significantly increased while the floatability of quartz showed no change. HF pretreatment resulted in leaching of SiO2 and enrichment of Na, K and Al on the feldspar surface. Consequently, the negative surface charge of feldspar increased at pH 2, which allowed for the flotation separation of the feasible minerals. This took place via an increased electrostatic adsorption between DDA and Na, K, Al on the feldspar surface, which effectively increased its hydrophobicity and as a result, improved the floatability of feldspar. An alternative process which exhibited effective separation of quartz and feldspar while recycling the tailwater from the flotation was proposed. |
topic |
hydrofluoric acid flotation DDA ATR-FTIR |
url |
http://www.mdpi.com/2075-163X/8/4/149 |
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