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| Optimization of ilmenite beneficiation separation test by combined depressant |
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Received:November 14, 2023
Revised:March 20, 2024
Accepted:April 12, 2024
Published Online:August 05, 2025
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| DOI： |
| KeyWord:ilmenite;magnetic separation;flotation;response surface method;TiO2 grade;MLA analysis |
| Author | Institution |
| Rong Yiyang |
Faculty of Land Resource Engineering,Kunming University of Science and Technology |
| Ye Guohua |
Faculty of Land Resource Engineering,Kunming University of Science and Technology |
| Hu Yujie |
Faculty of Land Resource Engineering,Kunming University of Science and Technology |
| Xiang Xinyue |
Faculty of Land Resource Engineering,Kunming University of Science and Technology |
| Song Changxu |
Faculty of Land Resource Engineering,Kunming University of Science and Technology |
| Zhang Yun |
Faculty of Land Resource Engineering,Kunming University of Science and Technology |
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| Abstract: |
| The content of TiO2 in an ilmenite is 5.83%, and the content of TFe is 14.00%, but the content of pyroxene is high. Aiming at the problem of separation of ilmenite, the magnetic-floating combined process is adopted in this paper. According to the characteristics of the ore, a pre-enrichment test scheme was developed. The pre-enrichment test adopted weak magnetic iron removal and strong magnetic tailings discarding. The magnetic field strength of weak magnetic field was determined to be 0.1T, and the magnetic field strength of strong magnetic field was 1.2T, and then the flotation separation test was carried out on the titanium rough concentrate after magnetic separation. In order to inhibit the influence of pyroxene, three inhibitors were proposed : water glass, CMC and sodium hexametaphosphate, which combined to inhibit the influence of pyroxene on ilmenite flotation. Through the optimization design and analysis of the model in the response surface method, it is shown that under the optimal conditions of water glass 272.02 g/t, CMC 89.85 g/t, and sodium hexametaphosphate 142.8 g/t, a ilmenite concentrate with a grade of 35.65% and a recovery rate of 86.22% can be obtained. This result is consistent with the model prediction. Finally, a titanium concentrate with a grade of 48.24% and a recovery of 62.55% was obtained through a closed-circuit test of one roughing, two cleaning and one scavenging. |
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