A full-scale study on the recovery of ultra-fine and low-grade barite and pyrite using an agitated reflux classifier

IF 5 2区工程技术 Q1 ENGINEERING, CHEMICAL

Minerals Engineering Pub Date : 2025-08-28 DOI:10.1016/j.mineng.2025.109700

Zhenqiang Liu , Dongfang Lu , Yuhua Wang , Xiayu Zheng , Zhenhua Su , Bing Liu , Yangge Zhu

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引用次数: 0

Abstract

The agitated reflux classifier (ARC) is capable of efficiently separating particles based on density differences. This device has been demonstrated to be effective in the separation of various minerals with density contrasts and has already undergone successful pilot-scale testing for the recovery of ultra-fine and low-grade barite and pyrite. Building upon the pilot-scale experiments, this study presents the full-scale structural design and operational study of the ARC. Results indicate that for a feed material with BaSO₄ grade of 22.62 % and an Fe grade of 9.27 %, a single-stage enrichment using the full-scale ARC yields a concentrate with an average BaSO₄ grade of 44.16 % and an Fe grade of 18.28 %. The corresponding BaSO₄ and Fe recoveries reach 83.16 % and 84.02 %, respectively. Sieve analysis of the products reveals that the full-scale ARC performs well in separating material coarser than 0.016 mm, while losses in the − 0.016 mm fraction are the primary cause of reduced overall recovery. These findings confirm that the full-scale ARC enables efficient co-enrichment of ultra-fine and low-grade barite and pyrite.

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采用搅拌回流分级机回收超细、低品位重晶石和黄铁矿的试验研究

搅拌回流分级器（ARC）能够有效地根据密度差对颗粒进行分离。该装置已被证明是有效的各种矿物的密度对比分离，并已成功地进行了中试试验，回收超细和低品位的重晶石和黄铁矿。在中试实验的基础上，本研究提出了ARC的全尺寸结构设计和运行研究。结果表明，对于BaSO4品位为22.62%、Fe品位为9.27%的原料，采用全尺寸ARC单段富集可获得BaSO4品位平均为44.16%、Fe品位平均为18.28%的精矿。相应的BaSO4和Fe回收率分别达到83.16%和84.02%。产品的筛分分析表明，全尺寸ARC在分离粗于0.016 mm的物料时表现良好，而在- 0.016 mm部分的损失是降低总回收率的主要原因。这些结果证实了全尺寸ARC能够实现超细、低品位重晶石和黄铁矿的高效共富集。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Minerals Engineering 工程技术-工程：化工

CiteScore

8.70

自引率

18.80%

发文量

519

审稿时长

81 days

期刊介绍： The purpose of the journal is to provide for the rapid publication of topical papers featuring the latest developments in the allied fields of mineral processing and extractive metallurgy. Its wide ranging coverage of research and practical (operating) topics includes physical separation methods, such as comminution, flotation concentration and dewatering, chemical methods such as bio-, hydro-, and electro-metallurgy, analytical techniques, process control, simulation and instrumentation, and mineralogical aspects of processing. Environmental issues, particularly those pertaining to sustainable development, will also be strongly covered.