Method for recovering valuable metals and simultaneously preparing ceramsite by roasting cyanide tailing
US10626053B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 28, 2018 |
| Grant date | Apr 21, 2020 |
| Priority date | — |
| Expiry date | May 28, 2038 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P40/60
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for recovering valuable metals and simultaneously preparing ceramsite by roasting cyanide tailing belongs to the area of comprehensive recovery and high value utilization of metallurgical waste residue. In this method, cyanide tailings, bentonite, calcium chloride, coal powder and albite are mixed by ball milling according to certain weight ratio to get a mixture. After drying and roasting twice, dust is collected from the roasted ash, the obtained polymetallic ash is collected and treated. The secondary calcined material is cooled to obtain ceramsite. The invention volatilizes and recovers the valuable metal in the roasting and sintering process of cyanide tailings and directly prepares the ceramsite through reasonable batching, which achieves the effect of recycling cyanide tailings and high-value utilization, can create good economic and environmental benefits, and has significant effect of energy saving and consumption reduction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.