2014-Sustainable Industrial Processing Summit
SIPS 2014 Volume 3: Non-ferrous & Iron_Steel
| Editors: | Kongoli F |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2014 |
| Pages: | 522 pages |
| ISBN: | 978-1-987820-05-8 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Studies of noble metals behavior in lead smelting processes
Viktor Shumskiy1; Svetlana Leiman1;1VNIITSVETMET, Ust-Kamenogorsk, Kazakhstan;
Type of Paper: Regular
Id Paper: 327
Topic: 3
Abstract:
Processes of lead raw materials smelting are considered to be a quite significant source for production of such noble metals as gold and silver. Thereat, these metals may constitute a considerable part in total cost of lead industry products. That can be explained by the following reasons. Firstly, gold and silver grades in lead concentrates can be very high. Secondly, metallic lead is the best noble metals collector, which is widely used for processing noble metals concentrates as a part of lead charge. But the higher content of noble metals in lead charge is the most important issue of limitation of these metals losses with waste slags gets.
The purpose of the research was searching for possibilities and conditions to minimize noble metals losses in lead smelting processes. That required studies of the patterns and determination of the key technological factors influencing behavior of gold and silver in lead and polymetallic raw materials smelting processes. The following activities were carried out in particular:
- analysis of silver losses forms in lead smelting slags;
- studies of kinetics of carbothermic reduction of oxidized melts having different basicity at smelting of lead charge having high silver grade;
- regression analysis of the technological factors predetermining gold and silver distribution in lead smelting products (based on KIVCET process data).
The studies carried out allowed finding out the physical-and-chemical peculiarities of noble metals generation in slag, and discovering of the main technological factors influencing the value of the losses, and determination of the conditions necessary for reduction of the losses value. The results indicate that KIVCET process has good conditions for minimization of noble metals losses at smelting of the charge having increased gold and silver grade.
The research results can be of high interest for lead enterprises processing lead-silver feed or involving considerable amount of gold-bearing materials into processing.