A process for the floatation separation of black titanium stone in a titanium-containing electric furnace smelting separation slag

By combining microwave roasting and flotation processes with alkali/acid leaching technology, the problem of low extraction rate of black titanium stone was solved, achieving efficient separation and recovery of black titanium stone, and significantly improving the extraction rate and purity.

CN121060706BActive Publication Date: 2026-06-09CHONGQING INST OF NEW ENE STOR MATER & EQUIP +2
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
CHONGQING INST OF NEW ENE STOR MATER & EQUIP
Filing Date
2025-10-15
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing technologies are insufficient for the efficient recovery and utilization of black titanium in titanium-containing electric furnace slag. Traditional magnetic separation and gravity separation methods have low extraction rates, typically less than 20%.

Method used

The process employs microwave roasting, crushing and grinding, alkali/acid leaching and flotation, combined with inhibitors, attractants and frothers. Microwave roasting promotes the initial separation of black titanium stone from impurities, and the extraction rate is improved during the flotation process.

Benefits of technology

The extraction rate of black titanium stone was increased to 85.4%, and the MgTi2O5 content was increased to 94.2%, which are 327% and 135.5% higher than those of traditional methods.

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Abstract

The present application relates to the field of colored smelting slag utilization, and particularly relates to a flotation separation process for black titanium stone in titanium-containing electric furnace melting separation slag. The process comprises the following steps: microwave heat preservation roasting: the titanium-containing electric furnace melting separation slag is placed into a microwave heating furnace for heat preservation roasting to obtain roasted slag; crushing and grinding: the roasted slag in step 1 is crushed and ground to obtain melting separation slag powder; the melting separation slag powder obtained in step 2 is subjected to alkali leaching or acid leaching, and then subjected to water washing and filtration to obtain alkali leaching slag or acid leaching slag; flotation: the acid leaching slag / alkali leaching slag obtained in step S3 is prepared into ore slurry, and then an inhibitor, a trapping agent and a foaming agent are added into the ore slurry with PH being 5-11, and the black titanium stone in the titanium-containing electric furnace melting separation slag is separated through flotation. Through implementation of the present application, the extraction rate of the black titanium stone is improved.
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