用于黄铁矿凹陷和绿色浮选分离的可生物降解酸--综述。

IF 8.1 2区 工程技术 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY
Critical Reviews in Biotechnology Pub Date : 2024-09-01 Epub Date: 2023-08-20 DOI:10.1080/07388551.2023.2238885
Ali Asimi Neisiani, Saeed Chehreh Chelgani
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引用次数: 0

摘要

由于对贱金属的需求呈指数级增长,对其相当低品位(>1%)资源的加工变得非常有意义。浮选是加工低品位硫化矿最重要的物理化学预处理技术。换句话说,浮选分离可以根据精细解放的贱金属硫化物的表面特性,有效地提升它们的品位。浮选表面活性剂(捕收剂、活化剂、抑制剂、pH 值调节剂、起泡剂等)可以改变硫化物的各种表面特性。然而,这些试剂大多有毒。因此,使用可生物降解的浮选试剂对于矿石处理厂的绿色转型至关重要,因为浮选回路需要处理大量的水和物料。黄铁矿是最丰富的硫化矿物,经常与有价值的矿物伴生,是一种麻烦的矸石。它给技术和环境带来了严重的困难。因此,黄铁矿应在选矿过程中尽早去除,以尽量减少其带来的问题。最近,传统的无机黄铁矿抑制剂(如氰化物、石灰和硫氧化合物)已成功地被环保型绿色试剂(包括多糖类物质和可生物降解的酸)所辅助甚至取代。然而,关于通过浮选分离去除黄铁矿的可降解酸抑制试剂(如单宁酸、乳酸、腐殖酸等),目前还没有全面的综述。本研究全面回顾了之前在这一领域开展的研究,并为未来的评估和发展提供了建议。本综述系统地探讨了这些试剂在黄铁矿表面的凹陷性能、各种吸附机制和各个方面。此外,还分析了影响其效率的因素,并强调了每个领域的差距。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Biodegradable acids for pyrite depression and green flotation separation - an overview.

Exponential increasing demands for base metals have made meaningful processing of their quite low-grade (>1%) resources. Froth flotation is the most important physicochemical pretreatment technique for processing low-grade sulfide ores. In other words, flotation separation can effectively upgrade finely liberated base metal sulfides based on their surface properties. Various sulfide surface characters can be modified by flotation surfactants (collectors, activators, depressants, pH regulators, frothers, etc.). However, these reagents are mostly toxic. Therefore, using biodegradable flotation reagents would be essential for a green transition of ore treatment plants, while flotation circuits deal with massive volumes of water and materials. Pyrite, the most abundant sulfide mineral, is frequently associated with valuable minerals as a troublesome gangue. It causes severe technical and environmental difficulties. Thus, pyrite should be removed early in the beneficiation process to minimize its problematic issues. Recently, conventional inorganic pyrite depressants (such as cyanide, lime, and sulfur-oxy compounds) have been successfully assisted or even replaced with eco-friendly and green reagents (including polysaccharide-based substances and biodegradable acids). Yet, no comprehensive review is specified on the biodegradable acid depression reagents (such as tannic, lactic, humic acids, etc.) for pyrite removal through flotation separation. This study has comprehensively reviewed the previously conducted investigations in this area and provides suggestions for future assessments and developments. This robust review has systematically explored depression performance, various adsorption mechanisms, and aspects of these reagents on pyrite surfaces. Furthermore, factors affecting their efficiency were analyzed, and gaps within each area were highlighted.

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来源期刊
Critical Reviews in Biotechnology
Critical Reviews in Biotechnology 工程技术-生物工程与应用微生物
CiteScore
20.80
自引率
1.10%
发文量
71
审稿时长
4.8 months
期刊介绍: Biotechnological techniques, from fermentation to genetic manipulation, have become increasingly relevant to the food and beverage, fuel production, chemical and pharmaceutical, and waste management industries. Consequently, academic as well as industrial institutions need to keep abreast of the concepts, data, and methodologies evolved by continuing research. This journal provides a forum of critical evaluation of recent and current publications and, periodically, for state-of-the-art reports from various geographic areas around the world. Contributing authors are recognized experts in their fields, and each article is reviewed by an objective expert to ensure accuracy and objectivity of the presentation.
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