Innovative application of polyferric sulfate in deep depress pyrite activation: Activation mechanisms and sustainability benefits

IF 4.3 2区工程技术 Q2 ENGINEERING, CHEMICAL

Chemical Engineering Science Pub Date : 2025-10-08 DOI:10.1016/j.ces.2025.122752

Zhicong Wei, Junnan Qu, Peilun Shen, Haiyun Xie, Yang Liu, Haokai Di, Yan Huan, Qihao Gui, Dianwen Liu

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Abstract

Pyrite, a vital raw material in metallurgy, chemical industry, battery manufacturing, and other sectors, is also a key economic product in mineral processing. However, in the flotation of complex sulfide ores, pyrite’s floatability significantly decreases due to the “depress-first, then flotation” process. This study, employing micro-flotation tests, SEM, XPS, ToF-SIMS, and zeta potential measurements, reveals that the decline in pyrite recovery stems from the formation of hydrophilic layer during prior flotation stages. To address this, polyferric sulfate (PFS) was introduced as a novel eco-friendly activator. It adjusts pH via Fe³⁺ hydrolysis and adsorbs/aggregates the hydrophilic layer. These actions refresh the mineral surface and enhance pyrite’s floatability. Base on these findings, the industrial-scale trials were conducted in a copper concentrator factory and achieved tremendous success. Through technological reform, the grade of pyrite concentrate was effectively improved and the cost of reagents was reduced.

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聚合硫酸铁在深压黄铁矿活化中的创新应用：活化机理及可持续性效益

黄铁矿是冶金、化工、电池制造等行业的重要原料，也是矿物加工的重要经济产品。而在复杂硫化矿的浮选过程中，黄铁矿的可浮性因“先降后浮”而明显降低。通过微浮选试验、SEM、XPS、ToF-SIMS和zeta电位等测试结果表明，黄铁矿回收率的下降源于浮选前期亲水性层的形成。为了解决这一问题，聚合硫酸铁（PFS）作为一种新型的环保活化剂被引入。它通过Fe3+水解调节pH值，并吸附/聚集亲水性层。这些作用刷新了矿物表面，增强了黄铁矿的可浮性。在此基础上，在某铜选矿厂进行了工业规模的试验，取得了巨大的成功。通过技术改造，有效提高了黄铁矿精矿品位，降低了药剂成本。

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来源期刊

Chemical Engineering Science 工程技术-工程：化工

CiteScore

7.50

自引率

8.50%

发文量

1025

审稿时长

50 days

期刊介绍： Chemical engineering enables the transformation of natural resources and energy into useful products for society. It draws on and applies natural sciences, mathematics and economics, and has developed fundamental engineering science that underpins the discipline. Chemical Engineering Science (CES) has been publishing papers on the fundamentals of chemical engineering since 1951. CES is the platform where the most significant advances in the discipline have ever since been published. Chemical Engineering Science has accompanied and sustained chemical engineering through its development into the vibrant and broad scientific discipline it is today.