Method of melting oxidic slags and combustion residues
US6245123A · kind A · utility
5Cited by
13References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 24, 1998 |
| Grant date | Jun 12, 2001 |
| Priority date | — |
| Expiry date | Mar 24, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The process for melting oxidic slags and combustion residues having a minimum content of metallized portions such as, e.g., iron and/or carbon carriers, of 3% by weight is carried out in a shaft furnace directly heated by means of fossil fuels via burners. The molten slag bath is transferred into a hearth type furnace immediately adjoining the shaft furnace and in which metals such as, for instance, copper are separated by sedimentation under thermal dissociation and discharged separately via a bottom outlet. The completely oxidized slag reaches a consecutively arranged slag treating reactor via a separate discharge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.