卧式搅拌磨机工作参数对其磨矿效果的影响研究
发布时间：2019-06-11 21:19
【摘要】：卧式搅拌磨机是机械法制备超细粉体的关键设备,因其具有能量利用率高、噪音低等优点广泛应用于矿冶、涂料、航天、油漆等行业。如何实现在得到理想粒度产品的同时降低搅拌磨机的功耗一直是粉磨界众多学者致力研究的问题,然而相对于传统球磨机,搅拌磨机的发展起步比较晚,理论基础不太完善,加之搅拌磨机的性能受到转速、填充率、料球比、介质的物理性质等诸多工作参数的影响,长期以来搅拌磨机粉磨理论一直没有较大突破。鉴于此,本文在国内外研究的基础上对搅拌磨机的有用功率进行深入研究,并从实验角度研究了磨机工作参数对产品粒度等指标的影响规律,根据规律优化了磨机的工作参数。论文选取对磨机磨矿效果有主要影响作用的三个工作参数—转速、填充率、料球比进行研究。首先基于塑性位错理论和麦克斯韦速度分布理论对搅拌磨机的有用功率进行了理论研究,建立了考虑物料的磨机有用功率计算模型；然后基于三因素Box-behnken试验设计拟定了实验方案,在一台φ230x338的卧式搅拌磨机上实验,分析了转速、填充率、料球比对磨矿产品粒度以及粒度分布的影响规律；最后分别建立了粗端粒径、均匀性系数、比能耗的响应面回归模型,并求出了三者取得最佳值时所对应的工作参数组合。研究发现,当转速为1210.27r/min、填充率为0.74、料球比为0.6时,粗端粒径取得最佳值5.20μm；当转速为1367.88r/min、填充率为0.67、料球比为0.9时,均匀性系数取得最佳值0.491；当转速为1040.92r/min,填充率为0.69,料球比为0.78时,搅拌磨机的比能耗取得最小值0.094。同时根据实验结果验证了考虑物料的搅拌磨机有用功率理论模型是可行的。这些研究成果将为不同工业需求下搅拌磨机工作参数的选择提供科学依据。
[Abstract]:Horizontal mixing mill is the key equipment for preparing ultra-fine powder by mechanical method, which is widely used in mining and metallurgy, coating, aerospace, paint and other industries because of its high energy utilization rate and low noise. How to reduce the power consumption of stirring mill while obtaining ideal particle size products has always been a problem that many scholars in the grinding field have been devoted to research. however, compared with the traditional ball mill, the development of stirring mill starts relatively late, the theoretical basis is not perfect, and the performance of stirring mill is affected by many working parameters, such as rotating speed, filling rate, ratio of material to ball, physical properties of medium and so on. For a long time, there has been no great breakthrough in the grinding theory of stirring mill. In view of this, on the basis of research at home and abroad, the useful power of mixing mill is deeply studied, and the influence of mill working parameters on product granularity and other indexes is studied from the experimental point of view, and the working parameters of the mill are optimized according to the law. In this paper, three working parameters, such as rotating speed, filling rate and ball ratio, which have the main influence on the grinding effect of mill, are selected to study. Firstly, the useful power of mixing mill is studied theoretically based on plastic dislocation theory and Maxwell velocity distribution theory, and the calculation model of useful power of grinding machine considering materials is established, and then the experimental scheme is designed and drawn up based on three-factor Box-behnken experiment, and the influence of rotating speed, filling rate, ratio of ball to grinding product particle size and particle size distribution is analyzed on a 蠁 230x338 horizontal mixing mill. Finally, the response surface regression models of coarse end particle size, uniformity coefficient and specific energy consumption are established, and the corresponding working parameters are obtained when the optimal values are obtained. It is found that when the rotating speed is 1210.27r 鈮，
本文编号：2497459
[Abstract]:Horizontal mixing mill is the key equipment for preparing ultra-fine powder by mechanical method, which is widely used in mining and metallurgy, coating, aerospace, paint and other industries because of its high energy utilization rate and low noise. How to reduce the power consumption of stirring mill while obtaining ideal particle size products has always been a problem that many scholars in the grinding field have been devoted to research. however, compared with the traditional ball mill, the development of stirring mill starts relatively late, the theoretical basis is not perfect, and the performance of stirring mill is affected by many working parameters, such as rotating speed, filling rate, ratio of material to ball, physical properties of medium and so on. For a long time, there has been no great breakthrough in the grinding theory of stirring mill. In view of this, on the basis of research at home and abroad, the useful power of mixing mill is deeply studied, and the influence of mill working parameters on product granularity and other indexes is studied from the experimental point of view, and the working parameters of the mill are optimized according to the law. In this paper, three working parameters, such as rotating speed, filling rate and ball ratio, which have the main influence on the grinding effect of mill, are selected to study. Firstly, the useful power of mixing mill is studied theoretically based on plastic dislocation theory and Maxwell velocity distribution theory, and the calculation model of useful power of grinding machine considering materials is established, and then the experimental scheme is designed and drawn up based on three-factor Box-behnken experiment, and the influence of rotating speed, filling rate, ratio of ball to grinding product particle size and particle size distribution is analyzed on a 蠁 230x338 horizontal mixing mill. Finally, the response surface regression models of coarse end particle size, uniformity coefficient and specific energy consumption are established, and the corresponding working parameters are obtained when the optimal values are obtained. It is found that when the rotating speed is 1210.27r 鈮，
本文编号：2497459
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