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| 高压料床粉碎过程中粉体物料的屈服特性研究 |
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| 投稿时间：2026-06-22 修订日期：2026-06-22 |
| DOI： |
| 中文关键词: 料床粉碎 屈服特性 料床稳定性 辊压机 节能降耗 |
| 英文关键词: particle-bed comminution yield characteristics bed stability roller press (HPGR) energy saving and consumption reduction. |
| 基金项目:中国建材集团揭榜挂帅项目“料床粉磨系统能效提升及智能化技术研发与应用”（2023YYSF02）支持 |
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| 中文摘要: |
| 本文针对辊压机等料床粉碎装备在粉磨细粉物料时容易因料床失稳导致设备振动、能耗增加等问题,聚焦于粉体物料在高压力下的力学特性开展研究,提出了粉体物料屈服强度的内在属性和表征方法,并制定了一套基于活塞压载试验的高压物料屈服特性实验规范,开发了专用实验装置。基于该方法,系统研究了不同水泥企业入辊物料的屈服特性,结果表明：(1)物料经高压料床粉碎后形成的料饼屈服强度与挤压强度在试验的压力窗口内呈显著的正比例关系,据此建立了预测和调控屈服强度的经验模型；(2)喂料中的细粉占比对成形的料饼屈服强度有显著影响,当细粉占比约20%时强度最高,过高或过低均导致强度下降,且过高的细粉占比会严重抑制粉碎效率。本研究为评价料床稳定性、优化辊压机操作参数提供了创新的试验方法和理论依据,更为实现粉磨系统的稳定、高效、低耗运行提供了明确的工程实践指导。 |
| 英文摘要: |
| To address machine vibration and increased energy consumption caused by bed instability in industrial roller presses for cement grinding, this paper focuses on the key intrinsic attribute of cement materials under high pressure—their yield characteristics. To effectively characterize this attribute, a high-pressure evaluation method based on a piston-loading test is proposed, for which a dedicated segmented self-locking die was designed. Using this method, the yield characteristics of materials fed to the roller press from different cement plants were systematically investigated. The results show that: (1) within the tested pressure window, the yield strength of the flake (compact) formed after high-pressure particle-bed comminution exhibits a clear directly proportional relationship with the pressing (compaction) strength; on this basis, an empirical model was established to predict and regulate yield strength; (2) the fraction of fines in the feed has a pronounced effect on the flake yield strength, which peaks at about 20%, whereas either higher or lower fines contents reduce the strength, and an excessively high fines fraction markedly suppresses comminution efficiency. The proposed method and analysis provide an innovative experimental approach and theoretical basis for assessing bed stability and optimizing roller-press operating parameters, thereby offering clear engineering guidance for stable, efficient, and low-energy operation of grinding systems. |
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