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为改善菱镁矿石机械磨碎中存在的细粒过磨、粉尘等问题,采用水中高压脉冲放电的方法对菱镁矿石的破碎特性进行实验。在?25kV条件下,对初始粒径约为6cm和8cm的菱镁矿石分别进行放电处理,利用显微成像、扫描电镜及能谱分析方法对破碎产物形态、成分进行分析,同时对破碎过程的冲击波压力进行研究。结果表明,菱镁矿石的破碎主要为解离破碎和混合破碎,产物中粒径小于150?m颗粒的质量分布比率小于10%,且可产生微米级的有用矿物单体颗粒,为菱镁矿石的后续分选提供了有利条件;破碎过程能量的转化效率为15.64%,符合相关理论研究结果。 相似文献
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Electrostatic separation has been extensively used in mineral processing, and has the potential to separate gangue minerals from raw talcum ore. As for electrostatic separation, the particle charging status is one of important influence factors. To describe the talcum particle charging status in a parallel plate electrostatic separator accurately, this paper proposes a modern images processing method. Based on the actual trajectories obtained from sequence images of particle movement and the analysis of physical forces applied on a charged particle, a numerical model is built, which could calculate the charge-to-mass ratios represented as the charging status of particle and simulate the particle trajectories. The simulated trajectories agree well with the experimental results obtained by images processing. In addition, chemical composition analysis is employed to reveal the relationship between ferrum gangue mineral content and charge-tomass ratios. Research results show that the proposed method is effective for describing the particle charging status in electrostatic separation. 相似文献
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针对风煤富集区域的风-氢-煤化工多能耦合系统(wind power-hydrogen energy storage-coal chemical multi-funtiaonal coupling system, WP-HES&CCMFCS)的低碳问题,基于排放因子法提出一种自上而下和自下而上相结合多能耦合系统的碳排放核算和低碳效益评估方法。首先,阐述多能耦合系统结构及其碳排放核算和低碳效益评估流程;利用广义Bass模型的不同冲击函数设定3种情景,并预测多能耦合系统关键环节风电在各情景下到2025年的技术扩散趋势;其次,综合考虑系统的能量流动约束和稳定运行约束,构建多能耦合系统的碳排放核算和低碳效益评估模型;最后,以新疆地区风电场和煤化工企业为背景进行验证。结果表明,2种低碳情景较既定情景净收益提升分别为7.88%和3.54%,碳配额交易收益提升分别为31.73%和15.39%,并通过灵敏度分析得出2种耦合参数在特定区域时系统规划结果性价比将更低,为后续多能系统规划提供了新思路,并为工程决策者提供了规避低性价比的投资方案。 相似文献
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