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中南大学学报(英文版)

Journal of Central South University

Vol. 23    No. 1    January 2016

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Effect and mechanism of siderite on reverse anionic flotation ofquartz from hematite
LUO Xi-mei(罗溪梅)1, YIN Wan-zhong(印万忠)2, WANG Yun-fan(王云帆)3, SUN Chuan-yao(孙传尧)4, MA Ying-qiang(马英强)2, LIU Jian(刘建)1

1. State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization,
Faculty of Land and Rescource Engineering, Kunming University of Science and Technology,
Kunming 650093, China;
2. College of Zijin Mining, Fuzhou University, Fuzhou 350116, China;
3. Faculty of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China;
4. Beijing General Research Institute of Mining & Metallurgy, Beijing 100044, China

Abstract:Reverse flotation technology is one of the most efficient ways to improve the quality and reduce impurity of iron concentrate. Mineral processors dealing with hematite face a challenge that the flotation results of reverse flotation of hematite are poor in presence of siderite using fatty acid as collector, starch as depressant of iron minerals and calcium ion as activator of quartz at strong alkaline pH. In this work, the effect of siderite on reverse anionic flotation of quartz from hematite was investigated. The effect mechanism of siderite on reverse flotation of hematite was studied by solution chemistry, ultraviolet spectrophotometry (UV) and Fourier transform infrared spectroscopy (FTIR). It was observed that siderite had strong depressive effect on quartz in flotation using sodium oleate as collector, corn starch as depressant of iron minerals and calcium chloride as activator of quartz at strong alkaline pH. The starch was adsorbed onto calcium carbonate by chemical reaction which was formed by from siderite dissolution and Ca2+ from calcium chloride as activator of quartz and precipitated on the surface of quartz, which resulted in improving the hydrophilic ability of quartz.

 

Key words: siderite; quartz; hematite; mineral dissolution; starch; calcium carbonate; sodium oleate; froth flotation

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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