Method of extracting lithium from spodumene and meanwhile recovering low iron and low sulfur silicon aluminum micro-powder, high purity gypsum, tantalum niobium concentrate and lithium rich iron material
US12421571B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jan 26, 2024 |
| Grant date | Sep 23, 2025 |
| Priority date | — |
| Expiry date | Jan 26, 2044 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of extracting lithium from spodumene and meanwhile recovering low iron and low sulfur silicon aluminum micro-powder, high purity gypsum, tantalum niobium concentrate and lithium rich iron material includes: mixing and leaching the lithium extraction acid clinker of spodumene with water; filtering the leached pulp to obtain the filtrate and the filter residue; neutralizing the filtrate; filtering the neutralized pulp to obtain the filtrate and high purity gypsum, extracting lithium from the filtrate to obtain lithium salt; neutralizing and mixing the filter residue to obtain the coarse and fine particles by classification; carrying out weak magnetic separation of fine particles to obtain lithium rich iron material and non-magnetic material; and carrying out strong magnetic separation, strong magnetic material gravity separation and tantalum niobium crude concentrate pickling on the non-magnetic material to obtain tantalum niobium concentrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.