微细粉体的静电充电及电感式电荷传感器的电荷极性评估

Tong Deng, Vivek Garg, M. Bradley
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引用次数: 1

摘要

当颗粒变小时,粉末的静电电荷变得很重要,特别是对于微米或亚微米尺寸的细粉末。粉末的充电会引起很强的颗粒附着力,因此在混合或混合以及筛分等过程中会遇到困难。粉末的电荷不仅影响产品的工艺和质量,而且放电也会产生粉尘爆炸的危险。评估火药装药和制造过程中的危害是很困难的。其中一个主要的挑战是评估粉末中的电荷水平和极性,但这需要大量的测试来检测散装材料中的电荷趋势和分布,这是非常耗时的。本文简要介绍了粉末在物料搬运过程中的静电充电及其危害。对于一个评估,挑战传感静电电荷的颗粒固体,特别是细粉末,讨论。结果表明,由于带电粒子的分离困难,对具有代表性的粉末样品的电荷极性检测可能是主要的挑战。电感式电荷传感器在测量粉末中的电荷水平和极性分布方面显示出巨大的潜力。实验结果表明,电感式电荷传感器可用于快速评估粉末的可充电性和电荷极性分布。
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Electrostatic Charging of Fine Powders and Assessment of Charge Polarity Using an Inductive Charge Sensor
Electrostatic charging of powders becomes important, when particles become smaller, especially for fine powders at micron or sub-micron size. Charging of powders causes strong particle adhesion and consequently difficulties in processes such as blending or mixing, and sieving, etc. Not only does the charge of powders influence the process and the quality of the products, but also the discharge creates risks of dust explosion. Assessing powder charge and the hazards in manufacturing can be difficult. One of the major challenges is to evaluate the charge levels and polarity in the powders but this requires a significant number of tests to detect charge tendency and distributions in bulk materials, which is time-consuming. In this paper, electrostatic charging of powders in material handling processes and the associated hazards are briefly reviewed. For an assessment, the challenges for sensing electrostatic charges of particulate solids, particularly for fine powders, are discussed. It was revealed that sensing the charge polarity for representative samples of powders can be the main challenge because of the difficulty in separation of the charged particles. The inductive charge sensor showed great potential to measure charge levels and polarity distributions in powders. Experimental trials for several fine powders showed that the inductive charge sensor can be used for rapidly assessing chargeability and charge polarity distribution of powders.
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来源期刊
Nanomanufacturing and Metrology
Nanomanufacturing and Metrology Materials Science-Materials Science (miscellaneous)
CiteScore
5.40
自引率
0.00%
发文量
36
期刊介绍: Nanomanufacturing and Metrology is a peer-reviewed, international and interdisciplinary research journal and is the first journal over the world that provides a principal forum for nano-manufacturing and nano-metrology.Nanomanufacturing and Metrology publishes in the forms including original articles, cutting-edge communications, timely review papers, technical reports, and case studies. Special issues devoted to developments in important topics in nano-manufacturing and metrology will be published periodically.Nanomanufacturing and Metrology publishes articles that focus on, but are not limited to, the following areas:• Nano-manufacturing and metrology• Atomic manufacturing and metrology• Micro-manufacturing and metrology• Physics, chemistry, and materials in micro-manufacturing, nano-manufacturing, and atomic manufacturing• Tools and processes for micro-manufacturing, nano-manufacturing and atomic manufacturing
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