Two-step flotation recovery of iron concentrate from Donganshan carbonaceous iron ore |
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| Authors: | Wan-zhong Yin Yue-xin Han and Feng Xie |
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| Affiliation: | [1]School of Resource and Civil Engineering, Northeastern University, Shenyang 110004, China [2]Department of Materials Engineering, University of British Columbia, Vancouver V6T IN6, Canada |
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| Abstract: | The flotation of pure and natural carbonaceous iron ore samples in the oleate flotation system was investigated. Starch can
depress hematite effectively in a wide pH range, but cannot depress siderite efficiently in neutral conditions. The flotation
recovery of pure hematite, siderite, and quartz in the oleate-starch-CaCl2 system is significantly different when the slurry pH varies from 4 to 12. A novel two-step flotation process was developed
for the separation of iron concentrate from Donganshan carbonaceous iron ore through which the siderite concentrate is first
recovered and the high quality hematite concentrates with relative high iron recovery can be obtained in the second step flotation.
The siderite concentrate may be utilized directly or undergo further concentration steps to increase iron grade. |
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| Keywords: | iron ores siderite hematite reverse anionic flotation recovery |
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