Recovery of iron from iron tailings by co-pyrolysis with coal gangue: process optimization and economic evaluation
Zheng Liu, Fengxing Zhang, Guanling Zheng · 2025
Read Recovery of iron from iron tailings by co-pyrolysis with coal gangue: process optimization and economic evaluation by Zheng Liu, Fengxing Zhang, Guanling Zheng (2025) in the Tower of Babel, a free online library of public-domain works preserved in clean, searchable text. No sign-up. The full text is served as a plain-text file at a predictable URL, where text is present: https://antarctic-labs.com/tower-of-babel/pmc-12824190.txt.
Description
Zheng Liu, Fengxing Zhang, and Guanling Zheng recover iron from mine tailings by heating them together with coal gangue, a second waste rock. Mountains of both wastes pile up at mines, and standard iron recovery leans on costly fossil fuels. In their process, the gangue itself supplies the reducing gases and carbon, replacing bought fuel.
Tuning temperature, time, mix ratio, and magnet strength gave a concentrate with about fifty-nine percent iron and three quarters of the iron recovered. Analysis showed the gangue's gases converted weakly magnetic hematite into strongly magnetic magnetite, which a weak magnet can then pull out. A plant-scale cost study found the route cheaper than rivals once by-products are counted. Leftover solids were turned into strong unfired bricks, closing the waste loop.
Catalog record
| CREATOR | Zheng Liu, Fengxing Zhang, Guanling Zheng |
|---|---|
| YEAR | 2025 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 44 KB |
| VERSION | 1.0 |
| LICENSE | CC BY 4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |