Effect of grinding media, time, and particle size on coal particle shape: Interpretation of aspect ratio-modified roundness for products of ball and rod mills

IF 5 2区工程技术 Q1 ENGINEERING, CHEMICAL Minerals Engineering Pub Date : 2024-12-18 DOI:10.1016/j.mineng.2024.109158

Guihua Zheng , Zhe Yang , Kangkang Sun , Hongguang Lv , Liqiang Ma

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Abstract

Particle shape plays a crucial role in mineral processing and is largely influenced by grinding. However, traditional descriptions of particle shape using circularity are often inadequate to reveal the grinding mechanism. This study applied a new aspect ratio (AR)-modified roundness to quantify particle shape. The shape of anthracite particle as a function of different grinding conditions was analyzed using AR-modified roundness in comparison with circularity. Statistical analysis of the t-test was used to validate the data reliability. The results indicated that AR-modified roundness provides a more comprehensive and accurate characterization of particle shape and evaluation of abrasion mechanism. Additionally, the grinding media and grinding time influence the shape of particles across different size fractions in the milled products, highlighting the intricate interplay between these factors. This paper offers insights on optimizing grinding processes to improve processing efficiency by exploring how milling conditions influence particle shape.

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磨矿介质、时间和粒度对煤颗粒形状的影响：球磨机和棒磨机产品长径比修正圆度的解释

颗粒形状在选矿过程中起着至关重要的作用，磨矿对颗粒形状的影响很大。然而，传统的用圆度来描述颗粒形状往往不足以揭示磨削机理。本研究采用一种新的宽高比（AR）修饰圆度来量化颗粒形状。采用ar修正圆度法与圆度法对比分析了不同磨削条件下无烟煤颗粒形状的变化规律。采用t检验进行统计分析，验证数据的信度。结果表明，ar修饰的圆度可以更全面、准确地表征颗粒形状和评价磨损机理。此外，磨矿介质和磨矿时间影响磨矿产品中不同粒度的颗粒形状，突出了这些因素之间复杂的相互作用。本文通过探索铣削条件对颗粒形状的影响，提供了优化磨削工艺以提高加工效率的见解。

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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.