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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Study On Hygroscopicity And Microstructure Of Mixed Lead Concentrate And Recycle Dust In Kivcet Flash Smelting Process
Jadong Li1; Ping Zhou1; Hongjie Yan1; Ji Ma1; Zhou Liao2;1CENTRAL SOUTH UNIVERSITY, Changsha, China; 2ZHUZHOU SMELTER GROUP CO., Zhuzhou, China;
Type of Paper: Regular
Id Paper: 213
Topic: 6
Abstract:
The objective of this study is to investigate the hygroscopic properties of the mixed lead concentrate (MLC) and recycle dust (RD) and to discuss the relationship between their hygroscopicity and microstructure. The hygroscopisity of MLC and RD was investigated by the moisture adsorption test performed over the temperature range of 25-85¡æ and relative humidity (RH) of 35-95%. The microstructure was investigated by the scanning electron microscopy (SEM) and the laser particle size analysis (LPSA). The results indicate that the equilibrium moisture content (EMC) of MLC and RD vary from 0.076% to 0.667% and 0.033% to 0.354%, respectively. Besides, the EMC of MLC is higher than that of RD under the same condition of RH. The changing trends of EMC for both materials are different which indicates that MLC and RD accord with different hygroscopicity rules. Moreover, the SEM results show that the microstructure of MLC tends to be more irregular and much rougher than that of RD. According to the LPSA results, the average particle sizes of MLC and RD are 5.319¦Im and 2.657¦Im, respectively, and the size distribution of RD particle is more homogeneous, which cause the different hygroscopic properties of the two materials. Lastly, two kinds of isothermal adsorption models are fitted to help predicting equilibrium moisture adsorption content of the MLC and RD during the production.
Keywords:
Furnace; Lead; Materials; Microstructure; Recycling;References:
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