两种高压脉冲发生器系统的矿石预浓缩效率比较

IF 4.9 2区 工程技术 Q1 ENGINEERING, CHEMICAL Minerals Engineering Pub Date : 2024-10-03 DOI:10.1016/j.mineng.2024.109036
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引用次数: 0

摘要

启用高压脉冲(HVP)进行矿石预选可能会为采矿业节省大量能源,并提高低品位矿石的等级。高压脉冲破碎常用的两种脉冲发生器系统是 Marx 发生器和脉冲变压器。本次初步评估比较了华中科技大学(HUST)的 SelFrag 实验室设备(使用 Marx 发生器)和定制 HVP 设备(使用脉冲变压器)的预浓缩性能。利用这两种发电机系统收集了八组实验结果。分析数据的方法有两种:一种是使用所有八组数据的趋势线方法,另一种是使用匹配的特定能量输入的单点比较方法。结果显示,预浓缩效率存在显著差异,哈工大的机器表现更好。为了阐明潜在的原因,我们对两种发电机系统的尺寸减小程度(t10)、破损概率和选择性破损进行了调查。选择性破碎的效率可能是主要原因之一,哈工大机器在选择性破碎高等级颗粒方面表现更好,能耗更低。此外,两种发生器系统的单位放电能量水平不同;这一差异的影响应在今后的工作中加以研究。
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A comparison of ore pre-concentration efficiency between two high voltage pulse generator systems
High Voltage Pulse (HVP) enabled ore pre-concentration can potentially provide large energy savings and the ability to upgrade low-grade ores for the mining industry. Two types of pulse generator systems commonly used in HVP breakage are Marx generators and pulse transformers. This initial assessment compares the pre-concentration performance of a SelFrag Lab Unit (utilising a Marx generator) and a custom-built HVP machine (employing a pulse transformer) from Huazhong University of Science and Technology (HUST). Eight sets of experimental results using the two generator systems were collected. Two approaches were taken to analyse the data; a trendline approach using all eight sets of data, and a single-point comparison approach with matched specific energy inputs. The results show that there are significant differences in pre-concentration efficiencies with the HUST machine performing better. To elucidate the potential causes, the degree of size reduction (t10), breakage probability, and selective breakage were investigated for the two generator systems. It is likely that the efficiency of selective breakage is one of the major causes, with the HUST machine presenting better results at selectively breaking high-grade particles and consuming less energy. Additionally, the two generator systems have different energy per discharge levels; the effect of this difference should be investigated in future work.
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来源期刊
Minerals Engineering
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.
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