Abstract
Brass ash of composition (wt-%) 59-67Zn-9-22Cu-1.45Pb-2-61SiO 2-0-36Cl was treated by carbothermal reduction in a temperature controlled tube furnace. The aim of the work was to collect zinc in the form of metal and/or zinc oxide in the gaseous phase. Treatment temperature (950-1200°C) and time (15-180 min) were varied. At 1200°C and 60 min, recovery of zinc was 92.5% and zinc content in the remaining residue was found to be 12.8 wt-%. Kinetic analysis of the experimental results showed that initially the reaction was under chemical control with an activation energy of 90.1 kJ mol-1. Subsequently the development of a sintering structure caused the reaction mechanism to change to diffusion control.
| Original language | English |
|---|---|
| Pages (from-to) | 95-101 |
| Number of pages | 7 |
| Journal | Transactions of the Institutions of Mining and Metallurgy, Section C: Mineral Processing and Extractive Metallurgy |
| Volume | 112 |
| Issue number | 2 AUGUST |
| DOIs | |
| Publication status | Published - Aug 2003 |
Keywords
- Brass ash
- Carbothermal reduction
- Pyrometallurgy
- Zinc recovery