浮选设备流体力学特征参数研究现状

浮选设备是矿物加工工程领域一种重要的气液反应装置,主要包括浮选机和浮选柱。浮选设备应用已有百年历史,随着选矿技术水平的提高,浮选设备逐渐向自动化、大型化的方向发展。近年来对浮选设备内流体力学特征参数的研究解析越来越多,进一步促进了设备的合理放大和优化。本工作在简要介绍目前浮选设备的发展和应用现状后,总结了国内外学者对浮选设备内气泡尺寸、气含率和气泡速度3个重要流体力学特征参数的检测方法和研究现状,提出了在今后研究中,开发以机器视觉为核心的检测技术和强化侵入式检测装置的适用性是流体力学特征参数检测手段的发展方向之一。

Research status of hydrodynamic characteristic parameters of flotation equipment

Flotation equipment is an important gas–liquid reaction device in the field of mineral processing engineering. Flotation equipment has been used for one hundred years. With the rapid development of society, flotation equipment has gradually developed towards automation and large-scale. In recent years, more and more researches and analysis of hydrodynamic characteristic parameters in flotation equipment have been carried out, which has further promoted the reasonable enlargement and optimization of equipment. This work briefly introduced the current development and application status of flotation equipment, then summarized in detail the detection methods, principles and the current research status of three important hydrodynamics characteristic parameters in flotation equipment: bubble size, gas holdup and bubble velocity. According to the current development direction of mineral processing equipment, it was pointed out that how to accurately detect the parameters of the flotation bubble and improved the adaptability of the detection device, and widely applied in the industry to improve the flotation index are still a key issue that researchers faced at present. Image processing technology which can detect multiple characteristic parameters in the flotation equipment had been widely used, but bubble image processing methods which the majority of research scholars had put forward at present have limitations, and failed to involve many complicated details and the actual environment of concentrator, leading to the poor stability and low accuracy of bubbles when bubbles feature was extracted. Therefore, it was necessary to develop machine vision technology that was used in a variety of complex environments and had a strong ability to sort complex problems. At the same time, some sophisticated intrusion detection equipment such as conductivity probes still had certain defects in complex flotation environments. How to design and develop intrusive devices that are more conducive to complex flotation environments was one of the current research direction.