Improving xanthate flotation of fine pyrite using SPAM and the mechanism

IF 2.3 4区工程技术 Q3 CHEMISTRY, MULTIDISCIPLINARY

Separation Science and Technology Pub Date : 2023-07-09 DOI:10.1080/01496395.2023.2232942

Yunlou Qian, Dan Zou, Renfan Chen, Xiaolong Huang, Zhen Wang

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引用次数: 0

Abstract

ABSTRACT This paper focuses on the promotion mechanism of sulfonated polyacrylamide (SPAM) on SBX flotation performance on fine pyrite, and verifies the positive effect for a gold ore with pyrite as the main Au-bearing mineral. Micro flotation showed that fine pyrite (−26 + 15 μm) floated poorly compared with coarser ones (−74 + 38 μm), and this cannot be completely filled through increasing the SBX dosage; however, by adding moderate SPAM into the pulp after SBX the flotation of fine pyrite was obviously improved. The real ore flotation revealed that SPAM decreased total reagent dosage and improvement on the concentrate indexes. SBX/SPAM system enabled faster settlement of fine pyrite compared with only SBX or SPAM system, indicating that larger particle size was obtained through hydrophobic and bridging flocculation. Zeta potential results showed that the pre-adsorbed SBX had little effect on the further adsorption of SPAM. Contact angle measurements suggested that the addition of moderate SPAM (50 μg/L) had almost no effect on pyrite surface hydrophobicity, illustrating that SPAM just bridged different fine particles adsorbed SBX rather that covered them. FTIR results showed that the amount of SPAM participating in bridging action was few.

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SPAM改进黄原药浮选细粒黄铁矿及其机理

摘要研究了磺化聚丙烯酰胺(SPAM)对细粒黄铁矿SBX浮选性能的促进机理，并对某以黄铁矿为主含金矿石的SBX浮选效果进行了验证。细粒黄铁矿(−26 + 15 μm)与粗粒黄铁矿(−74 + 38 μm)相比，微细粒黄铁矿(−26 + 15 μm)的浮选效果较差，不能通过增加SBX的掺量来完全充填;在SBX后矿浆中加入适量SPAM，可明显改善细粒黄铁矿的浮选效果。实际浮选结果表明，SPAM降低了药剂总用量，改善了精矿各项指标。与单独的SBX或SPAM体系相比，SBX/SPAM体系对细粒黄铁矿的沉降速度更快，说明通过疏水和桥接絮凝获得了更大的粒径。Zeta电位结果表明，预吸附的SBX对SPAM的进一步吸附影响不大。接触角测量结果表明，适量SPAM (50 μg/L)的加入对黄铁矿表面疏水性几乎没有影响，说明SPAM只是桥接了不同细颗粒对SBX的吸附而不是覆盖。FTIR结果表明，参与桥接作用的SPAM数量很少。

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来源期刊

Separation Science and Technology 工程技术-工程：化工

CiteScore

6.10

自引率

3.60%

发文量

131

审稿时长

5.7 months

期刊介绍： This international journal deals with fundamental and applied aspects of separation processes related to a number of fields. A wide range of topics are covered in the journal including adsorption, membranes, extraction, distillation, absorption, centrifugation, crystallization, precipitation, reactive separations, hybrid processes, continuous separations, carbon capture, flocculation and magnetic separations. The journal focuses on state of the art preparative separations and theoretical contributions to the field of separation science. Applications include environmental, energy, water, and biotechnology. The journal does not publish analytical separation papers unless they contain new fundamental contributions to the field of separation science.