Abstract
The existing tin smelting processes have the disadvantages of high smelting temperature, long smelting time and especially high tin losses. In this paper, the effect of basicity on the product quality during tin smelting was studied by monitoring the CaO/MgO ratio. It was found that the iron content in the metal product depends on the Fe/Sn ratio in the slag. A high tin metal product (98.52% Sn and 1.02% Fe) was obtained and a small loss of Sn went into the slag (<10%) at a reduction temperature of 1400°C and basicity of 1.2. The low Fe content in the Sn metal would make the subsequent tin refining easier. The Nb and Ta content in the slag increased to 4.96 and 5.06% respectively. The main phases in the slag were Ferrocolumbite, Niobium oxide and Tantalum oxide. The recovery was high for Sn in the metal and Nb/Ta in the slag.
| Original language | English |
|---|---|
| Article number | 122 |
| Journal | Proceedings of the World Congress on Mechanical, Chemical, and Material Engineering |
| DOIs | |
| Publication status | Published - 2018 |
| Event | 4th World Congress on Mechanical, Chemical, and Material Engineering, MCM 2018 - Madrid, Spain Duration: 16 Aug 2018 → 18 Aug 2018 |
Keywords
- Cassiterite
- Nb-Ta
- Slag basicity
- Smelting
ASJC Scopus subject areas
- Mechanical Engineering
- Mechanics of Materials
- General Chemical Engineering