2016-Sustainable Industrial Processing Summit
SIPS 2016 Volume 5: Starkey Intl. Symp. / Mineral Processing
| Editors: | Kongoli F, Kumar P, Senchenko A, Klein B, Silva A.C., Sun C, Mingan W |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2016 |
| Pages: | 270 pages |
| ISBN: | 978-1-987820-44-7 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Removal of phosphorus from high phosphorus iron ores in Wushan Mountain by Crosscurrent acid leaching
Xiang Xiaoyan1; Xia Wentang1; xiaoli yuan2; Jianguo Yin1; Juan An3;1, Chongqing, China; 2, chongqing, China; 3SCHOOL OF METALLURGICAL AND MATERIALS ENGINEERING, UNIVERSITY OF SCIENCE AND TECHNOLOGY, Chongqing, China;
Type of Paper: Regular
Id Paper: 109
Topic: 5
Abstract:
In the process of resource utilization of high phosphorus iron ores, phosphorus should be removed first. Compared to other dephosphorization methods, selective leaching with acid has special advantages such as high de-phosphorizing efficiency, low iron loss and so on. However, a large amount of acidic wastewater containing phosphorus was produced after acid leaching. Therefore, the rational use of acidic wastewater and decrease of acid consumption is crucial to remove phosphorus by acid leaching. In this paper, the thermodynamics of the acid leaching was studied according to the existence form of mineral constituents. Then, crosscurrent acid leaching was employed to remove phosphorus from high phosphorus iron ore in Wushan Mountain and the changes in de-phosphorizing efficiency, iron loss and acid concentration was observed during the leaching. The results showed that the phosphorus in Wushan iron ore could be removed selectively by acid leaching. After three-stage crosscurrent leaching, the dephosphorization ratio exceeded 74% and the iron loss was under 2.1%. Meanwhile, the acid concentration was decreased to 0.65mol/l in leaching solution, which could be returned to selective leaching after precipitation of phosphorus and supplement of hydrochloric acid.
Keywords:
Hydrometallurgical; Iron; Mineral; Ore; Phosphate;References:
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