Experimental study and application of pre-demagnetization for desulfurization and quality improvement of high-sulfur magnetite ore

HUANG Yuzhi; XIE Xian; LAN Xixiong; LIU Daicai; ZHANG Zijiang; GAN Yunxiao

doi:10.7513/j.issn.1004-7638.2026.03.021

Volume 47 Issue 3

Jun. 2026

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HUANG Yuzhi, XIE Xian, LAN Xixiong, LIU Daicai, ZHANG Zijiang, GAN Yunxiao. Experimental study and application of pre-demagnetization for desulfurization and quality improvement of high-sulfur magnetite ore[J]. IRON STEEL VANADIUM TITANIUM, 2026, 47(3): 181-188. doi: 10.7513/j.issn.1004-7638.2026.03.021

Citation:

HUANG Yuzhi, XIE Xian, LAN Xixiong, LIU Daicai, ZHANG Zijiang, GAN Yunxiao. Experimental study and application of pre-demagnetization for desulfurization and quality improvement of high-sulfur magnetite ore[J]. IRON STEEL VANADIUM TITANIUM, 2026, 47(3): 181-188. doi: 10.7513/j.issn.1004-7638.2026.03.021

Citation:

HUANG Yuzhi, XIE Xian, LAN Xixiong, LIU Daicai, ZHANG Zijiang, GAN Yunxiao. Experimental study and application of pre-demagnetization for desulfurization and quality improvement of high-sulfur magnetite ore[J]. IRON STEEL VANADIUM TITANIUM, 2026, 47(3): 181-188. doi: 10.7513/j.issn.1004-7638.2026.03.021

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Experimental study and application of pre-demagnetization for desulfurization and quality improvement of high-sulfur magnetite ore

doi: 10.7513/j.issn.1004-7638.2026.03.021

1.
Yunnan Hualian Zinc & Indium Co., Ltd., Wenshan 663700, Yunnan, China
2.
Faculty of Land and Resource Engineering, Kunming University of Science and Technology, Kunming 650000, Yunnan, China

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Received Date: 2025-09-01
Accepted Date: 2025-10-02
Rev Recd Date: 2025-09-21
Publish Date: 2026-06-29

Abstract

Abstract

In this paper component analysis was conducted on the high-sulfur magnetite ore from the Dulong mining area, by means of MLA. Analysis results indicate that the valuable elements in the high-sulfur magnetite ore are mainly iron, sulfur, and tin. Iron mainly exists in the form of magnetite, while sulfides are primarily present in pyrite and pyrrhotite, and tin exists in the form of cassiterite. The gangue minerals mainly consist of talc, iron talc, and biotite. Based on the analysis on the ore components, a separation process of 'pre-demagnetization, flotation desulfurization, and weak magnetic separation had been proposed. Closed circuit separation test results indicated that under the conditions of pre-demagnetization treatment, grinding fineness of -0.074 mm at 89%, activator AS-106 at 3500 g/t, collector B30-2 at 150 g/t, and weak magnetic separation field strength of 0.1 T, a high iron sulfur concentrate with a sulfur grade of 23.94%, iron grade of 60.16%, and sulfur recovery rate of 97.70% could be obtained. Besides, a high-quality iron concentrate with sulfur content of 0.43%, iron grade of 66.79%, and recovery rate of 57.08% was also achieved.
- high-sulfur magnetite,
- pre-demagnetization,
- flotation desulfurization,
- weak magnetic separation

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References

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