Abstract
The present invention relates to a process for separating metals using a series of precipitations from waste materials of the zinc or steel industry, or both. The method is characterized in carrying out the precipitations using hydroxides or sulfur-containing chemicals selected from sulfates, sulfides, sulfur oxides and sulfites, or both, in order to obtain metal precipitates as well as an aqueous sulfur-containing solution, the latter optionally being recycled in the process, whereafter a final precipitate is carried to a thermal step, for forming.
Patent family as of 20.12.2021
EP3555327 A1 20191023 EP20170880716 20171215
EP3555327 A4 20200812 EP20170880716 20171215
FI128281 B 20200228 FI20160005972 20161215
FI20165972 L 20180616 FI20160005972 20161215
WO18109283 A1 20180621 WO2017FI50901 20171215
Link to currentpatent family on right
| Original language | English |
|---|---|
| Patent number | FI128281B |
| IPC | C22B 19/ 30 A I |
| Priority date | 15/12/16 |
| Publication status | Published - 28 Feb 2020 |
| MoE publication type | H1 Granted patent |