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A characteristic of most minerals processing systems is that they are multi-phase. The Lagrangian nature of SPH means that it is well suited to modelling these systems as it can naturally track interfaces and free surfaces. In this paper we describe a massively parallel SPH simulator that we have developed and highlight some of the features that have been implemented. These features include surface tension and contact angles, two way coupled solid fluid-interactions and animated geometries. The capabilities of this simulator are illustrated by means of examples showing its ability to simulate a wide range of different minerals processing related systems including particle scale heap flow, multi-phase interactions in a sheared slurry and multi-phase mixing. 相似文献
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《Minerals Engineering》2006,19(2):130-139
In this study, the performance evaluation studies in five cement grinding circuits, in which HPGR is used in various configurations, were presented. Sampling surveys were performed around the circuits followed by the determination of the size distribution of the samples down to 1.8 μm using a combination of sieving and laser sizing methods. The results showed that the specific energy consumption of the circuit decreases as the size reduction achieved by the HPGR increases. As given in the case studies when the size reduction ratio (F80/P80) changed from 308.2 to 4.4, the specific energy consumption of the HPGR was 8.02 and 4.05 kWh/ton, respectively. Since various configurations offer rather different ball mill feeds, the best usage of HPGR could be attained by optimization of operating parameters of both ball mills and air classifiers. 相似文献
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在铸铁段用于金川磨矿的实践中,发现钢球更换为铸铁段后磨矿细度均有不同程度的提高,说明铸铁段对提高磨矿细度有利,而且铸铁段要求的磨机充填率低。在钢球作为磨矿介质时,球磨机的电单耗在32.54kW·h/t,而铸铁段作为磨矿介质时,球磨机的电单耗为30.87kW·h/t,降低了1.67个百分点。在钢球更换为铸铁段后最显著的变化是球耗,随着磨矿时间的增加,铸铁段消耗呈现逐渐降低趋势。 相似文献
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就压片法制样、用荧光品位分析仪分析铁矿样品时,样品的粒度对分析结果产生的影响作了定量研究,提出的有关分析条件用于实际样品分析中,获得了较满意的结果。 相似文献
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讨论了将快速定量装车系统技术应用于主井箕斗装载过程中的可行性与必要性。通过工艺流程的比对,分析得出主井箕斗装载过程实现较高程度自动化控制的2个关键环节为煤仓下给煤机给煤速率的调节和带式输送机输送速度的调节,并针对这2个关键环节提出了可行的处理办法。 相似文献
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介绍了切缝药包爆破技术的爆破原理,施工工艺及要求。金佳矿在+1721m水平瓦斯抽放巷施工中采用了该项技术,取得了较好的效益。 相似文献
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本文研究了防老剂甲对煤炭自燃的阻化作用,结果表明,防老剂甲对煤炭的氧化有显著的阻化作用,它与现有阻化剂相比,其作用的本质是利用化学原理中断煤炭的氧化反应链,达到阻燃的目的。 相似文献
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以龙永煤田培丰勘探区为例,主要探讨采用时间序列粒度分析曲线在地层对比中的应用,即根据岩石粒度绘出的粒度曲线进行地层对比,可以避免因地层中化石和其它岩矿特征不明确所导致的对比困难或错位,对于勘探中取得更为准确的地质资料具有重要的意义。 相似文献
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目前,城镇地籍测量采用的主要方法是常规GPS结合传统测量技术。这种方法的缺点是:在进行静态控制测量无法获得控制点的实时坐标,单基站RTK测量作业距离受到限制。本文通过一个实例证明:在进行城镇地籍测量中,采用CORS的网络RTK技术来进行城镇地籍测量各项精度指标都可以达到规范的要求,而且能够减少劳动强度,提高城镇地籍测量的工作效率,完全可以代替常规仪器来进行城镇地籍测量工作。 相似文献
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Data reconciliation is extensively applied to improve the accuracy and reliability of plant measurements. It relies on process models ranging from simple mass and energy conservation equations to complete causal models. The precision of reconciled data mainly depends on the complexity and quality of plant models used to develop data reconciliation observers. In practice, the difficulty of obtaining detailed models prevents the application of powerful observers like the Kalman filter. The objective of this study is to propose a methodology to build a model for a flotation circuit to support the implementation of a Kalman filter for dynamic data reconciliation. This modeling approach extracts essential information from the plant topology, nominal operating conditions, and historical data. Simulation results illustrate that applying a Kalman filter based on a rough empirical model that has been correctly tuned gives better estimates than those obtained with sub-model based observers. 相似文献
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