Utilization of soluble starch as the depressant to flotation separation of pyrite from arsenopyrite

Ran, Jincheng; Li, Yuepeng; Zhao, Xiangmo; Jiang, Man; Gao, Enxia

doi:10.1016/j.seppur.2023.123155

Cited by 25 publications

(1 citation statement)

References 52 publications

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“…It has been cited in the literature that soluble starch is a promising depressant of arsenopyrite: even at low concentrations, it is adsorbed on the mineral surface by chemical adsorption and hydrogen bonding, where the poor flotation of arsenopyrite is attributed to the formation of the hydrophilic, i.e., hydroxylated iron [17].…”

Section: Introductionmentioning

confidence: 99%

Depression of Arsenopyrite during Collectorless Flotation in Presence of Aqueous Metal Ions and Inorganic Compounds

Reyes,

Martínez Rojo,

Escudero

et al. 2023

Minerals

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Currently, the depression of arsenopyrite during the flotation of base metal mineral sulfides is being continuously studied to reduce its presence in sulfide concentrates of economic interest. In this work, the influence of aqueous metal ions (Fe2+, Cu2+, and Zn2+) in concentrations of 5, 25, and 75 g∗ton−1; mixtures of aqueous chlorides (ammonium and magnesium) and aluminum sulfate (AS)–sodium silicate (SS); and the use of only ordinary Portland cement (OPC) in all concentrations of 0.05 to 0.6 g∗ton−1 during the collectorless flotation and depression of a single-phase majority of arsenopyrite was analyzed. The results revealed a decrease in the hydrophobicity; its depression was greater with the use of OPC. At the concentration of 0.4 g∗ton−1 at alkaline pH and a pulp potential of +0.067 V, in 0.5 min, its flotation was 15.4 % w/w and the cumulative recovery at 10 min was 46.4 % w/w. The arsenopyrite depression was as follows: OPC > mixed chlorides > ASSS. Fe2+, Zn2+, Cu2+ ions activate flotation arsenopyrite. The solids obtained during the flotation were characterized using FTIR, and the functional groups responsible for the depression of arsenopyrite were identified.

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Section: Introductionmentioning

confidence: 99%