2016-Sustainable Industrial Processing Summit
SIPS 2016 Volume 10: Battery, Recycling, Environmental, Mining
| Editors: | Kongoli F, Kumar V, Aifantis K, Pagnanelli F |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2016 |
| Pages: | 220 pages |
| ISBN: | 978-1-987820-54-6 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Leaching kinetics of ladle furnace waste slag by ammonium chloride solution
Feng Li1; Guo Jun Ma2; ZhiBo Tong3; Hui Tang4;1KEY LABORATORY FOR FERROUS METALLURGY AND RESOURCES UTILIZATION OF MINISTRY OF EDUCATION, WUHAN UNIVERSITY OF SCIENCE AND TECHNOLOGY, Wuhan, China; 2KEY LABORATORY FOR FERROUS METALLURGY AND RESOURCES UTILIZATION OF MINISTRY OF EDUCATION, WUHAN UNIVERSITY OF SCIENCE AND TECHNOLOGY,WUHAN 430081, CHINATHE STATE KEY LABORATORY OF REFRACTORIES AND MET, wuhan, China; 3KEY LABORATORY FOR FERROUS METALLURGY AND RESOURCES UTILIZATION OF MINISTRY OF EDUCATION,WUHAN UNIVERSITY OF SCIENCE AND TECHNOLOGY, P.R. CHINA, 430081, WuHan, China; 4WUHAN UNIVERSITY OF SCIENCE AND TECHNOLOGY, Wuhan, China;
Type of Paper: Regular
Id Paper: 120
Topic: 7
Abstract:
The iron and steel industry shares about 6~7% of global anthropogenic CO2 emissions. Meanwhile, significant volumes of waste slag, such as ladle furnace (LF) slag, are discharged. Recently, indirect aqueous carbonation process with minerals or basic oxides bearing solid wastes is one of the most promising options for CO2 sequestration. In this paper, the leaching behavior of Ca2+ from the waste slag using ammonium chloride solution and the pH values of leaching system were studied. The kinetic model and reaction mechanism of leaching process were also investigated. The results show that the leaching reaction of Ca2+ mainly occur at the initial stage of the reaction (0~30min), the extension of leaching time has little effect on Ca2+ leaching rate after leaching for 30min. Increasing the concentration of leachant and improving leaching temperature benefit to leach calcium from the waste slag. The leaching reaction of calcium in waste slag by ammonium chloride solution is found to be controlled by the diffusion of solid film.
Keywords:
kinetics; ladle furnace; waste slag; CO2; leachingReferences:
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