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| Application of Diffusion Dialysis Method to Pretreat Stone Coal Acid Leaching Solution |
| Received:December 24, 2016 Revised:December 27, 2016 |
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| DOI：doi：10.3969/j.issn.1007-7545.2017.04.010 |
| KeyWord:diffusion dialysis; stone coal; acid leaching solution; pretreatment |
| Author | Institution |
| WANG Kui |
武汉科技大学 资源与环境工程学院 |
| ZHANG Yi-min |
武汉科技大学 资源与环境工程学院 |
| HUANG Jing |
武汉科技大学 资源与环境工程学院 |
| LIU Tao |
武汉科技大学 资源与环境工程学院 |
| WANG Jing-peng |
武汉科技大学 资源与环境工程学院 |
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| Abstract: |
| Diffusion dialysis method was applied to pretreat stone coal acid leaching solution. Effects of feed flow rate, flow rate ratio (water/feed) on pH value of dialysate, sulfuric acid recovery, water reverse osmosis rate, and ions rejection were investigated. The results show that the optimum operation conditions include feed flow rate of 12 mL/min and flow rate ratio of water to feed of 1.0~1.1. Under the optimum operation conditions, pH value of acid leaching solution pretreated by diffusion dialysis rises to 1.0 from 0.04, sulfuric acid recovery is 71.12%, water reverse osmosis rate is 14.95%, and vanadium rejection is 95.50%. Rejection of impurity ions, such as Al, Fe, Mg, K, F, P, S is 99.04%, 97.37%, 98.01%, 85.12%, 98.33%, 91.16%, and 69.96% respectively. pH value of acid leaching solution is improved by pretreatment of diffusion dialysis. Recovered acid can be reused. |
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