A method for separating scandium and recovering iron and titanium from scandium-vanadium-titanium magnetite tailings

Through the combined roasting and leaching process, scandium is isolated from scandium-containing titanium magnetite tailings, and the iron and titanium recovery is achieved through the coordinated disposal of titanium dioxide waste acid, which solves the problems of low recovery rate, complex process, high pollution and high cost in the existing technology, and achieves efficient and environmentally friendly scandium separation and metal recovery effects.

CN118639016BActive Publication Date: 2025-03-21SOUTHWEAT UNIV OF SCI & TECH +1
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Patent Information

Application Number
CN202410595742.7
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-05-14
Publication Date
2025-03-21
Estimated Expiration
2044-05-14

AI Technical Summary

Technical Problem

The prior art has problems of low recovery, complex process, high pollution and high cost when extracting scandium from scandium-containing titanium magnetite tailings and titanium dioxide waste acid.

Method used

Scandium is isolated from scandium-containing vanadium-containing titanium magnetite tailings by adopting a combined roasting and leaching process, and the recovery of iron and titanium is achieved through the coordinated disposal of titanium dioxide waste acid. The specific steps include drying and crushing and mixing with titanium dioxide waste acid and coke to make pellets, performing low-temperature sintering and high-temperature calcination, followed by magnetic separation and ball milling, and finally separating scandium through leaching process.

Benefits of technology

It has achieved efficient extraction and separation of scandium in scandium-containing titanium magnetite, and took into account the recycling of iron and titanium. The process flow is short, the environmental pollution is small, the product quality is high, and the operability is strong.

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Abstract

The present invention relates to the field of mineral processing, and specifically discloses a method for separating scandium and recovering iron and titanium from scandium-vanadium-titanium magnetite tailings, comprising the following steps: drying and then crushing the scandium-vanadium-titanium magnetite tailings, adding titanium dioxide waste acid and coke to mix evenly, and then making pellets; sintering the pellets at low temperature, cooling, and obtaining dried pellets; high-temperature roasting the dried pellets, cooling, and obtaining roasted ore; ball milling the roasted ore, and then performing weak magnetic separation to obtain iron concentrate and non-magnetic product I; performing strong magnetic separation on the non-magnetic product I to obtain titanium concentrate and non-magnetic product II; performing gravity separation on the non-magnetic product II, and then filtering and dehydrating to obtain heavy product scandium concentrate and light product tailings; adding titanium dioxide waste acid to the scandium concentrate for leaching, and obtaining scandium-containing leaching solution and leaching residue. The method of the present invention has short process, low environmental pollution, high product quality, strong operability, and can efficiently extract and separate scandium in scandium-vanadium-titanium magnetite and scandium in titanium dioxide waste acid.
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