| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Characterization of Minerals, Metals and Materials 2024: Process-Structure-Property Relations and New Technologies
|
| Presentation Title |
Production of Zinc Oxide From Willemite Containing Ore From Kabwe Town in Zambia |
| Author(s) |
Yotamu Hara, Daliso Tembo, Ronald Hara, Rainford Hara, Alexander Oniel Noel Old |
| On-Site Speaker (Planned) |
Yotamu Hara |
| Abstract Scope |
High purity zinc oxide (>99 weight %) was produced from complex zinc silicate ore of Kabwe town of the Central province of Zambia via hydrometallurgical processing. The ore material was leached in sulphuric acid media to form zinc sulphate. Chemical analysis of the leach liquor revealed that there was partial dissolution of silica during leaching. The following parameters were studied; leaching temperature, pH and solid to liquid ratio. Leach efficiency of 97 % was obtained at a pH of less than 1.2. Zinc was recovered from solution via precipitation with sodium hydroxide, magnesium oxide and oxalic acid. Low grade zinc oxide was obtained during precipitation with sodium hydroxide and magnesium oxide owing to co-precipitation of SiO2. On the other hand, there was no co-precipitation of SiO2 during precipitation with oxalic acid such that high purity zinc oxalate was obtained. The precipitated zinc oxalate was heated up at 500 ⁰C to obtain zinc oxide with purity of more than 99 %. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Hydrometallurgy, Extraction and Processing |