System and method for recovering sulfur in copper smelting process
US11286162B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 2018 |
| Grant date | Mar 29, 2022 |
| Priority date | — |
| Expiry date | Apr 23, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22B15/0052
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A system and method for recovering sulfur in a copper smelting process includes removing fine dust from high-concentration SO2 flue gas from a matte smelting furnace, introducing the flue gas into a fluidized bed carbothermic reduction tower to be reduced by a carbon-based reducing agent to obtain reducing gas, passing the reducing gas through a high temperature separator to separate down unsaturated powder coke contained in the reducing gas, and condensing the reducing gas to obtain sulfur. The saturated powder coke entrained in the reducing gas enters a desorption tower to desorb SO2 gas therein, and the desorbed powder coke enters a fluidized bed sulfur reduction tower to continue to participate in the reduction reaction. Part of the SO2 gas discharged from the desorption tower is discharged to the fluidized bed carbothermic reduction tower to produce sulfur, and the other part enters a desulfurization tower.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.