A flotation separation method for removing talc from molybdenite by using sulfated sodium alginate

By using a combination of sodium alginate sulfate and heteropolar collectors in the flotation system, the problem of poor selectivity in the separation of molybdenite and talc was solved, achieving efficient molybdenum recovery and talc removal, improving the grade and recovery rate of molybdenum concentrate, and making it suitable for high-end special steel, aerospace alloys and catalysts.

CN122298582APending Publication Date: 2026-06-30CENT SOUTH UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-16
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Traditional polymeric inhibitors suffer from poor selectivity and reduced molybdenum recovery in molybdenite/talc separation systems due to non-specific adsorption.

Method used

Sodium alginate sulfate (SAS) is used as an inhibitor in combination with anisopolar collectors. By introducing high-density electronegative groups into the flotation system, targeted inhibition of talc is achieved and non-specific adsorption is avoided. The bidentate chelation and electrostatic repulsion between the sulfate ester group and talc, combined with the specific chemisorption of the anisopolar collector, achieves efficient separation of molybdenite and talc.

Benefits of technology

It significantly improves the grade and recovery rate of molybdenum concentrate, achieves efficient removal of talc, avoids molybdenum loss, and is environmentally friendly and highly adaptable, suitable for existing molybdenum ore flotation processes.

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Abstract

This invention discloses a flotation separation method for removing talc from molybdenite using sodium alginate sulfate. The method involves preparing a raw slurry from talc-type molybdenite, controlling the pH of the slurry to be 6.0–10.0. Sodium alginate sulfate is added to the slurry and stirred. Then, an anisopolar collector is added and stirred to condition the slurry. A frother is then added to obtain a mixed slurry. Finally, the mixed slurry is subjected to aerated flotation. The collected frothy product is the molybdenum concentrate, and the product in the tank is the talc-containing tailings. This invention, by adding sodium alginate sulfate (SAS), which has high electronegativity and strong chelating ability, as a specific inhibitor to the flotation system, blocks the contact between the collector and talc. Simultaneously, its strong electrostatic repulsion effectively prevents non-specific adsorption on the negatively charged molybdenite surface. This invention significantly improves the grade and recovery rate of molybdenum concentrate and has extremely high industrial promotion and engineering application value.
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