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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The Research and Engineering Practice of the Lead Oxygen-enriched Flash Smelting
Chengyan Wang1; Baozhong Ma2; Yongqiang Chen3; Peng Xing3;1UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING, Beijing, China; 2BEIJING GENERAL RESEARCH INSTITUTE OF MINING AND METALLURGY, Beijing, China; 3SCHOOL OF METALLURGICAL AND ECOLOGICAL ENGINEERING, UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING, Beijing, China;
Type of Paper: Regular
Id Paper: 236
Topic: 6
Abstract:
This paper introduces a lead oxygen-enriched flash smelting (LOFS) process. Compared with the existing bath smelting technologies, LOFS has many advantages, such as suitable for treating low grade secondary lead-bearing materials, high yield of lead bullion, low energy consumption for recovering zinc in raw materials, little uncontrolled emission of lead containing dust and considerable recoveries of valuable metals. A series of tests were carried out and the results showed that increasing CaO content of the slag could effectively reduce the lead content in the slag. Thereby, the appropriate FeO-to-SiO2 mass ratio was 1.15 and the appropriate CaO-to-SiO2 mass ratio was 0.6 for LOFS. The testing commissioning indicated that when using LOFS to treat lead-bearing raw material with about 30% of lead, the residual lead in slag can be decreased to 4-10%, and then after zinc volatilization by ore-smelting electric furnace, the contents of lead, zinc, silver, gold and copper in the final slag were below 2%, 2%, 6 g/t, 0.1 g/t and 1%, respectively. Moreover, the total recoveries of lead, zinc, silver, gold, copper and sulfur were above 98%, 90%, 99.5%, 99.5%, 85% and 98%, respectively. In addition, the energy-intensive zinc fuming furnace was eliminated in the LOFS process.