Method for directional recycling of lithium cobalt oxide residue and ferrophosphorus powder

By combining microwave activation and heated acid leaching with alkaline leaching to treat lithium cobalt oxide slag and ferrophosphorus powder, the problem of resource recovery of lithium cobalt oxide slag and ferrophosphorus powder has been solved, achieving efficient separation and cascade recovery of multiple elements, and improving resource utilization and economic efficiency.

CN122445932APending Publication Date: 2026-07-24HUNAN BRUNP RECYCLING TECH CO LTD +2
0 Cites 0 Cited by

Patent Information

Application Number
CN202610800002.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-06-04
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Existing technologies are insufficient for the efficient recovery of valuable metals from lithium cobalt oxide slag and iron phosphate powder, and the lack of material recycling results in low resource utilization and poor economic efficiency.

Method used

A mixture of lithium cobalt oxide slag and iron phosphate powder is activated by microwave, followed by heating, acid leaching, and extraction to separate cobalt and lithium elements. Iron and aluminum slag is then treated by alkaline leaching to construct an internal material recycling system, including the recycling of iron phosphate powder residue.

Benefits of technology

It achieves efficient separation and cascaded recycling of multiple elements such as cobalt, lithium, iron, phosphorus, and aluminum, reducing production costs and waste generation, improving resource utilization, and conforming to the concepts of green chemistry and circular economy.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The present application belongs to the technical field of solid waste resource utilization, and particularly relates to a method for directional recycling of lithium cobaltate slag and phosphorus iron powder, comprising the following steps: (1) mixing lithium cobaltate slag and phosphorus iron powder, then grinding and carrying out microwave activation treatment to obtain activated powder; (2) heating and acid leaching the obtained activated powder, and filtering to obtain leaching liquor and phosphorus iron powder residue; (3) adding iron powder to the leaching liquor and carrying out one-time heating reaction, and one-time filtering to obtain sponge copper and copper-removed liquid, adding an oxidizing agent and an alkali solution to the copper-removed liquid and carrying out two-time heating reaction, and two-time filtering to obtain impurity-removed liquid and iron aluminum residue; (4) adding an organic extractant to the impurity-removed liquid to separate cobalt and lithium elements, cobalt is extracted into the organic phase, and the extraction organic phase is subjected to inorganic acid back extraction to obtain cobalt back extraction liquid, and the raffinate is an inorganic lithium salt solution.
Need to check novelty before this filing date? Find Prior Art