搅拌磨超细粉碎工艺的研究

介绍了搅拌磨超细粉碎的工艺过程和助磨剂对超细粉碎效果的影响。探讨了搅拌磨超细粉碎的行为特征。研究表明,用搅拌磨可制得平均粒径小于１μｍ的超细滑石粉,工艺简单,效率高,产品无污染;助磨剂主要是通过与滑石粉的吸附作用,降低矿浆粘度,提高磨矿过程的分散性而产生助磨作用;     

针状硅灰石超细粉制备工艺研究

采用不同的粉碎方式及工艺条件制备硅灰石超细针状粉,对产物的粒度及长径比有重要的影响。试验首先用冲击式粉碎机对硅灰石进行选择性粉碎和富集,然后用气流粉碎机和介质搅拌磨对冲击粉碎产物进行超细粉碎试验,结果表明,对于搅拌磨,柱状介质比球状介质更有利于保护硅灰石原来的针柱状形态;对于2种超细粉碎方式,气流粉碎比搅拌磨矿具有更好的选择性,其硅灰石产品的针状结构明显优异,可获得高长径比的硅灰石超细针状粉。通过试验,确定了2种超细粉碎工艺的适宜条件。     

锆英石超细粉碎工程化研究

以SJ-90型搅拌磨为主体设备的中试线，进行锆英石超细粉碎工程化研究。当工艺条件为φmm和φ10mm两种锆球磨介质量百分比各占50％、球料比3：1、磨矿浓度50％时，磨矿粉碎8h所得产品细度为亚微米级。生产的锆英石超细粉BGRIMM-01达到并部分超过国际同类产品的质量。SJ-90型搅拌磨为主体粉碎设备的湿法超细粉碎中试线，效率高、操作简单、运转可靠，能满足工程化研究的需要和生产高质量的产品，具有推广和应用前景。     

重质碳酸钙干法超细粉碎设备的开发和应用

本文介绍了超细重质碳酸钙在填料工业中的应用，并评述了目前干法超细粉碎设备的应用状况，着重介绍了新型干法超细粉碎设备－立式螺旋搅拌磨机超细粉碎重质碳酸钙的工业应用情况，指出立式螺旋搅拌磨机是一种高效节能的超细粉磨设备。     

超细电气石粉体制备研究

使用介质搅拌磨对电气石粉进行了超细粉碎实验室试验研究和中试 ,并对试验样品进行了粒度检测、扫描电镜 (SEM )分析以及负离子释放性能检测。结果表明 ,制取的超细电气石粉体的粒度及其分布为d50 ≤ 0 .8μm、d97≤ 2 .0 μm。     

超细滑石粉的制备及应用

搅拌磨是一种新型高效超细粉碎设备，本文研究了搅拌制备超细滑石粉过程中矿浆浓度，球料比，介质种类及给料粒度对制粉效果的影响。结果表明，用搅拌磨可制得粒径小于１μｍ的超细滑石粉，工艺简单。     

CGM60-B锥摆式搅拌磨的设计

超细粉碎技术是近年来发展起来的一门新兴技术,它在化工、冶金、建材、电子、轻工、医药和农业等许多领域应用广泛。随着超细粉碎技术的发展,超细粉碎的设备也在不断地创新。与其它粉碎设备相比,搅拌磨因其具有的超细、高效、节能、低污染、操作简便等诸多优越性能,受到了越来越多的关注。近十多年来,搅拌磨在国内外迅速得到发展,出现了各种结构的搅拌磨：立式的、卧式的;盘式的、针（棒）形的;平板盘状的、非平板盘状的;三角齿的、方形齿的;齿的打击方向固定的、随时改变的。     

不同类型磨机对纤维水镁石超细粉碎的试验研究

采用搅拌磨(湿法)和振动磨(干法)两种不同设备，对纤维水镁石(FB)进行超细粉碎试验。试验结果：用振动磨超细FB，产品中位径是搅拌磨的1／5左右，比表面积为搅拌磨的3．6倍左右。实验农明：振动磨对FB超细粉碎效果较好，最佳研磨时间为3h，FB超细粉体的中位径D50为1．53μm，比表面积SA为2．606m^2／g，粒径分布比较集中。     

搅拌磨超细粉碎的工艺与应用研究

搅拌磨是一种新型高效的超细粉碎设备。研究了搅拌磨制备超细粉过程中矿浆浓度、球料比、介质种类及给料粒度对制粉效果的影响。结果表明，用搅拌磨可制得粒径小于１μｍ的产品，工艺简单。分析了搅拌球磨过程中矿浆粘度、温度和产品白度的变化，及搅拌磨的能量效率。用搅拌磨制得的超细滑石粉（－１μｍ）填充ＰＰ塑料，可提高制品性能，降低成本。     

干法搅拌磨超细粉碎系统生产过程中的降温措施

本文论述了干法搅拌磨超细粉碎系统在加工微米级微细粉的工业化生产过程中，磨机内温度升高的原因以及所采取的降温措施。     

搅拌磨在超细粉制备中的应用

本文阐述了搅拌磨的结构，搅拌磨制备超细粉的原理和工艺特点、以及搅拌磨的制粉效果，介绍了搅拌磨制粉的发展动向。     

Assessing the stirred mill design space

In the context of the mining industry, smaller grain size and other mineralogical characteristics have motivated the need to grind finer. In order to address this need, the interest in fine grinding technologies has grown over the last 20 years as is illustrated by a growing body of knowledge on stirred milling. Emphasis in recent years has been on the use of computationally intensive modeling and simulation methods such as the discrete element method (DEM) and computational fluid dynamics (CFDs). However, due to the computational requirements of these two methods, initiating a study that spans the stirred mill design space would take a lot of computational effort and time. Therefore the goal of this paper is to propose and apply a simplified stirred mill model that will then be used to assess configurations in the stirred mill design space.To this end, a stirred mill model was proposed based on the assumption that the main if not only mechanism of ore breakage is shear. As the basis of this model is the fluid mechanics definition of shear stress, the stirred mill power model became a function of viscosity, mill speed and a new parameter called shear volume. An initial validation using published data indicated the shear based power model correlated well with measured power.Establishing a morphological chart to delimit the stirred mill design space indicated that 24 design and operating conditions can be assess using the established shear volume measure. The results indicated for the mill configurations tested that a change in stirred mill liner design can potentially increase shear volume and power from 14% to 290% as compared to smooth chamber liners.     

用搅拌磨机对滑石超细粉碎的实验研究

随着现代工业的发展,对超细滑石粉的需求量日益增加,在国内外市场上供不应求。但目前用传统的粉碎设备粉碎滑石,不可能得到-1μm的超细粉。因此,笔者用搅拌磨机对滑石的超细粉碎进行了实验研究。结果表明;用搅拌磨机粉碎滑石可获得平均粒度-1μm的超细粉;结合实验结果应用输入功率计算公式和Charles公式,根据耗电量,可随意预测出粉碎产品的平均粒度。这对生产实践具有重要的实用价值。     

Generalizing a shear–volume power model for stirred mill power prediction

A stirred milling model, based on the concept of shear–volume power, was developed and applied to geometries typically found in mineral processing systems. Generalising this model permits its use to model more complex mill geometries, such as those describing a tapered disk mill and the CoBal mill. Due to the additive property of the shear–volume power, the calculation of the power of complex mills is possible through geometric decomposition. This approach is supported by the calculation of the shear–volume power of a number of simple geometries commonly found in mills, and is used in the calculation of the shear–volume power of a tapered disk mill and the CoBal mill. Finally, by incorporating a breakage model, an equation that offers some usefulness in the design, operation and optimization of stirred mills is presented.     

The shape of product size distributions in stirred mills

This paper presents the results of an extensive laboratory and pilot stirred milling testwork program conducted using different types of mills, fed with different types of materials and operated at different conditions. The results indicate that the slope of the product size distribution (PSD) curve remains relatively unchanged in the coarse product size range but decreases in the fine product range (less than about 20 μm size), regardless of the type of stirred milling technology used for grinding. This work therefore confirms that a narrower product particle size distribution than the feed size can be achieved independent of the type of stirred milling technology used for fine grinding below 20 μm. The change in the PSD width in fine grinding is due to the change in the material breakage properties and a change in the mill operating conditions which affect the breakage process. In the normal operating range of grinding media size, the effect on the PSD shape is not significant.     

电气石超细粉体的制备及粒度检测

电气石具有热释电效应、远红外辐射及释放大量负离子的特性,其超细粉体在纺织、涂料、水净化等领域有广泛应用。本文主要利用以气流磨和搅拌磨为主体的超细粉碎中试线,对电气石超细粉体的制备工艺进行了探讨。利用该工艺可以制备出亚微米和中位粒径小于100nm的电气石粉体,并且可实现工业化连续生产。     

搅拌磨制备超细凹土粉体的工艺优化

以江苏某地的凹土为原料,用搅拌磨在干法环境下制备了粒径小于1μm、粒度分布均匀的超细凹土粉体。通过条件实验,系统地研究了粉碎时间、搅拌器转速、球料比、球磨介质种类和尺寸以及助磨剂等因素对搅拌磨粉磨效果的影响规律,初步确立了制备超细凹土粉体的最佳工艺条件,从而为实际生产中确定适宜的工艺参数提供了依据。     

机械力化学法制备TiO_2/高岭土复合光催化剂

以高岭土为载体,采用机械力化学法制备了TiO2/高岭土复合光催化剂。以甲基橙溶液的光催化降解率作为评价指标,采用正交实验法,研究了纳米TiO2和高岭土混合研磨体系中固体浓度、球料比、复合研磨时间以及纳米TiO2的含量对复合材料光催化降解率的影响。实验结果表明,采用机械球磨技术可以制备具有光催化性能的TiO2/高岭土复合光催化剂。当高岭土湿磨时间为60min,纳米TiO2和高岭石混合研磨体系中固体浓度20%、球料比5∶1、复合研磨时间30min、纳米TiO2的含量为33.3%时,该复合材料对甲基橙的光催化降解率为69%,高于纯TiO2的光催化降解率。     

鞍钢脱硫扒渣选铁后尾渣超细粉磨试验研究

为使鞍钢脱硫扒渣选别后的尾矿能够用于代替部分水泥制备高强混凝土,采用普通球磨机和搅拌磨分别进行了脱硫扒渣尾渣的超细磨试验。通过条件实验,分别研究了普通球磨机和搅拌磨的球料比、矿浆浓度两个主要操作参数及磨矿时间对超细粉磨扒渣尾渣效果的影响规律,并分析了产生这种影响的原因。     

Effects of operating parameters on the efficiency of dry stirred milling

Stirred media milling is an industrially accepted efficient grinding method for fine and coarse particles. The stirred mills can be operated both in vertical and horizontal configurations and the selection depending on the process variables. Successful operation of horizontal stirred milling (i.e. IsaMill) in wet applications encouraged the studies in dry applications. In this study, series of dry grinding tests were performed in a prototype horizontal stirred mill (42 L) to investigate the effects of operating parameters such as stirrer speed, feed rate, media filling and ball size on grinding considering the degree of size reduction and the energy consumption. The test results have shown that the stirrer speed, the media size and the media filling are directly proportional and the feed rate is inversely proportional with the specific energy consumption. Besides, energy savings up to 27% were achieved by adjusting the milling conditions properly (suitable media size) and the size reduction values (F₅₀/P₅₀) were between 1.05 and 2.42.