【摘要】：臥式攪拌磨機是機械法制備超細粉體的關鍵設備,因其具有能量利用率高、噪音低等優(yōu)點廣泛應用于礦冶、涂料、航天、油漆等行業(yè)。如何實現(xiàn)在得到理想粒度產(chǎn)品的同時降低攪拌磨機的功耗一直是粉磨界眾多學者致力研究的問題,然而相對于傳統(tǒng)球磨機,攪拌磨機的發(fā)展起步比較晚,理論基礎不太完善,加之攪拌磨機的性能受到轉速、填充率、料球比、介質的物理性質等諸多工作參數(shù)的影響,長期以來攪拌磨機粉磨理論一直沒有較大突破。鑒于此,本文在國內(nèi)外研究的基礎上對攪拌磨機的有用功率進行深入研究,并從實驗角度研究了磨機工作參數(shù)對產(chǎn)品粒度等指標的影響規(guī)律,根據(jù)規(guī)律優(yōu)化了磨機的工作參數(shù)。論文選取對磨機磨礦效果有主要影響作用的三個工作參數(shù)—轉速、填充率、料球比進行研究。首先基于塑性位錯理論和麥克斯韋速度分布理論對攪拌磨機的有用功率進行了理論研究,建立了考慮物料的磨機有用功率計算模型；然后基于三因素Box-behnken試驗設計擬定了實驗方案,在一臺φ230x338的臥式攪拌磨機上實驗,分析了轉速、填充率、料球比對磨礦產(chǎn)品粒度以及粒度分布的影響規(guī)律；最后分別建立了粗端粒徑、均勻性系數(shù)、比能耗的響應面回歸模型,并求出了三者取得最佳值時所對應的工作參數(shù)組合。研究發(fā)現(xiàn),當轉速為1210.27r/min、填充率為0.74、料球比為0.6時,粗端粒徑取得最佳值5.20μm；當轉速為1367.88r/min、填充率為0.67、料球比為0.9時,均勻性系數(shù)取得最佳值0.491；當轉速為1040.92r/min,填充率為0.69,料球比為0.78時,攪拌磨機的比能耗取得最小值0.094。同時根據(jù)實驗結果驗證了考慮物料的攪拌磨機有用功率理論模型是可行的。這些研究成果將為不同工業(yè)需求下攪拌磨機工作參數(shù)的選擇提供科學依據(jù)。
[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，

本文編號：2497459