2016-Sustainable Industrial Processing Summit
SIPS 2016 Volume 8: Non-ferrous, Rotary Kiln, Ferro-alloys, Rare Earth, Coal
| Editors: | Kongoli F, Xueyi G, Shumskiy V, Kozlov P, Capiglia C, Silva AC, Turna T |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2016 |
| Pages: | 350 pages |
| ISBN: | 978-1-987820-50-8 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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A noval technology about efficient removal and resource recycling of mercury from non-ferrous smelting flue gas
Zhilou Liu1; Hui Liu2; Liyuan Chai3;1, Changsha, China; 2SCHOOL OF METALLURGY AND ENVIRONMENT, CENTRAL SOUTH UNIVERSITY, Changsha, China; 3CENTRAL SOUTH UNIVERSITY, Changsha, China;
Type of Paper: Regular
Id Paper: 260
Topic: 6
Abstract:
Mercury emission from non-ferrous smelting plants has attracted worldwide attention. To realize the goal of mercury removal from high SO2 concentration flue gas, a new method, using acidic thiourea solution, was proposed. It was found that it displayed significantly higher removal efficiency for elemental mercury from high SO2 flue gas, up to above 89% at the optimal condition. Low solution pH and temperature contributed to Hg0 removal due to the high stability of thiourea. Adding oxidants, such as FeCl3 and H2O2, could promote the oxidation of mercury, especially in the initial reaction period. After the mercury removal from flue gas, the CuCl2 modified activated carbon was added to acidic thiourea solution to absorb mercury. Almost 92% of mercury in solution was removed and the thiourea solution after absorption process could be reused to absorb gaseous mercury. In summary, the noval technology is environmentally sustainable for the recovery of mercury from non-ferrous smelting flue gas.