Effect of Gas Dispersion Properties and Bias in Scheelite Column Flotation

IF 2.2 4区 地球科学 Q2 GEOCHEMISTRY & GEOPHYSICS
Minerals Pub Date : 2024-08-29 DOI:10.3390/min14090881
HyunSoo Kim, Chul-Hyun Park
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Abstract

In this study, column flotation was used to recover a high-grade concentrate from low-grade WO3 ore. Gas dispersion properties, such as superficial gas velocity, gas holdup, bubble size, bubble surface area flux, carrying rate, and bias, were investigated in two phases (gas–liquid) and three phases (gas–liquid–solid) in the column, and their effects on the grade and recovery of WO3. It was confirmed that the gas velocity significantly affected these factors, with the gas holdup, bubble size, bubble surface area flux, and carrying rate tending to increase as the gas velocity increased. The bias increased with an increase in the wash water velocity. The results showed that the grade and recovery of WO3 could be controlled within a specific range of operating conditions of bias (0.27–0.48 cm/s) and carrying rate (10.53–18.83 g/min/cm2). Correlation plots of grade/recovery versus bias and carrying rate revealed that the optimal separation achievable for a given WO3 concentrate in a flotation column was a 72.16% grade with a 78.3% recovery, satisfying the metallurgical requirement of more than 50% for WO3.
白钨矿柱浮选中气体分散特性和偏差的影响
本研究采用柱浮选法从低品位 WO3 矿石中回收高品位精矿。研究了柱中两相(气-液)和三相(气-液-固)的气体分散特性,如表面气体速度、气体截留、气泡大小、气泡表面积通量、携带率和偏差,以及它们对 WO3 品位和回收率的影响。结果表明,气体速度对这些因素有显著影响,气体截留、气泡大小、气泡表面积通量和携带率随着气体速度的增加而增加。偏差随着洗涤水流速的增加而增加。结果表明,WO3 的品位和回收率可控制在偏压(0.27-0.48 厘米/秒)和携带率(10.53-18.83 克/分钟/平方厘米)的特定操作条件范围内。品位/回收率与偏差和运载率的相关图显示,浮选柱中给定 WO3 精矿的最佳分离度为 72.16% 的品位和 78.3% 的回收率,满足 WO3 超过 50% 的冶金要求。
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
Minerals MINERALOGY-MINING & MINERAL PROCESSING
CiteScore
4.10
自引率
20.00%
发文量
1351
审稿时长
19.04 days
期刊介绍: Minerals (ISSN 2075-163X) is an international open access journal that covers the broad field of mineralogy, economic mineral resources, mineral exploration, innovative mining techniques and advances in mineral processing. It publishes reviews, regular research papers and short notes. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. There is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced.
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