GK270N与GN300型密炼机的结构及性能比较

对GK270N和GN300两种型号密炼机的主要技术参数、结构特点和性能进行比较。GK270N型密炼机属于轻型密炼机,转子强度较低,比较适合斜交轮胎胶料生产;GN300型重型密炼机适用于各种胶料的塑炼、混炼和终炼,特别适用于子午线轮胎胶料的混炼和终炼。建议使用厂家根据实际需要选择更适用于本企业的设备,也可以根据现有的设备状况进行适当改造,使现有设备的功能得到充分发挥。     

白炭黑胶料混炼工艺探讨

研究GK270N型密炼机混炼排胶温度及氧化锌、防老剂加入顺序对白炭黑胶料密炼工艺性能、硫化特性及物理性能的影响。结果表明，排胶温度为160℃时混炼效果好；氧化锌在一段加入，混炼胶门尼粘度降低明显，定伸应力和抗撕裂性能较好；防老剂在一段加入，混炼胶工艺性能及其硫化胶物理性能最差。     

白炭黑胶料混炼工艺探讨

研究GK270N型密炼机混炼排胶温度及氧化锌、防老剂加入顺序对白炭黑胶料密炼工艺性能、硫化特性及物理性能的影响。结果表明，排胶温度为160℃时混炼效果好;氧化锌在一段加入，混炼胶门尼粘度降低明显，定伸应力和抗撕裂性能较好；防老剂在一段加入，混炼胶工艺性能及其硫化胶物理性能最差。     

缩短GK400N型密炼机转子加工周期

通过介绍应用精益六西格玛的工具和方法,实施缩短GK400N型密炼机核心件转子的粗车工序时间、堆焊层加工工序时间以及优化相关加工工艺路线等措施,实现缩短GK400N转子的整个加工周期,最终实现缩短密炼机的整体生产周期,进而为保障GK400N型密炼机交货期、节约制造成本等提供强力保证。     

引进GKN密炼机的安装与调试

介绍了青岛第二橡胶厂引进KRUPP公司GK400N/GK255N密炼机生产线安装,调试及试生产过程中的一些经验,重点介绍了GKN密炼机的优特点,以及喂料门,排料门处的改进。     

270L啮合型密炼机的研发及特点

简要阐述了270L啮合型密炼机中啮合型转子轮廓的CAD三维设计及创成模式、CAM三维数控加工模式。列出了与相切型密炼机某些技术参数的比较，特别说明了本机在混炼室结构、转子结构、转子内腔冷却结构、卸料门端部与混炼室的密封结构等方面的结构特点。最后介绍了该机的负荷试车及运行情况。     

双摆线转子啮合型实验室用密炼机

介绍双摆线转子啮合型实验室密炼机特点。该机既具有传统切线型密炼机的特点,又具有传统啮合型密炼机的特点,其混炼效果好、混炼效率高。双摆线转子系列实验室密炼机是科高公司自主发明创造开发的更新换代产品,其卸料装置采用新型曲柄滑块机构,没有锁紧装置,结构简单,成本低。     

GK270密炼机转子的修复

本文详细介绍了GK270型密炼机ZZ2型和N型2种转子修复的方法和过程。对密炼机转子在使用过程中出现的问题、造成磨损的原因进行了分析，对ZZ2型和N型2种转子的性能进行了比较，认为ZZ2型转子的总体性能要优于N型转子。最后对2种转子的修复方案和修复过程进行了介绍。     

益阳橡机E型密炼机渐成系列

益阳橡胶塑料机械集团有限公司坚持科技创新取得显著成效,继引进消化吸收德国克虏伯公司GK190E密炼机技术后,该公司又先后自主创新开发出GK45E、GK90E、GK250E、GK320E、GK520E等新品,系列化程度越来越高,并受到国内外客商的青睐。目前E型密炼机为益阳橡机国内独家生产。E型密炼机主要适用于高等级子午胎及橡胶制品炼胶的需要。随着“绿色轮胎”的出现和白炭黑填充技术的应用,需要密炼机具有良好的温度控制能力,这就迫使橡胶及轮胎工业大量采用E型啮合型转子密炼机。该公司生产的E型密炼机采用世界先进的PES3啮合型转子。该转子在…     

对同步转子密炼机混炼各种胶料的性能的研究

同步转子密炼机是８０年代末开始应用于橡胶工业的一种新型炼胶设备。它较大程度地提高了混炼胶质量和混炼效率，尤其使混炼胶的均匀性有了极大的改善，是剪切型转子密炼机中的佼佼者，有着广阔的发展前景。本文通过描述在Ｘ（Ｓ）Ｍ－ｌ．７型同步转子（ＺＷ－１型）密炼机上混炼五种不同用途的胶料，以探讨同步转子密炼机对各种胶料的混炼性能。     

Experimental characterization and multi-scale modeling of mixing in static mixers. Part 2. Effect of viscosity and scale-up

Static micro-mixers are used in precipitation processes to avoid mixing limitations. The mixing performance of these mixers, which are used in this study to mix two streams of different viscosity, is characterized using competitive-parallel chemical reactions and computational fluid dynamics (CFD). This work is an extension of a previous paper where mixing of fluids with equal viscosity has been studied [Lindenberg, C., Schöll, J., Vicum, L., Brozio, J., Mazzotti, M., 2008. Experimental characterization and multi-scale modeling of mixing in static mixers. Chemical Engineering Science 63, 4135-4149]. It is found that the mixing performance in terms of reaction yield and mixing time decreases slightly with increasing viscosity ratio in a two jet vortex mixer (Roughton mixer). In the Y-mixer the trend is the same at low flow rates, but it is the opposite at large flow rates due to a symmetry breaking phenomenon. The Roughton mixer is scaled-up using the CFD model and a linear relationship between scale-up factor and mixing time is observed. Finally, it is shown that mixing times can be described satisfactorily as a function of velocity, jet diameter and viscosity.     

炭黑填充型粉末天然橡胶的密炼机塑炼特性研究

采用实验室微型密炼机（Brabender转矩流变仪）研究了炭黑填充型粉末天然橡胶[P（NR/HAF）]的密炼机塑炼/混炼性能,即塑炼时间、塑炼温度和转速等基本工艺参数对胶料门尼粘度的影响。与传统的块状天然橡胶/炭黑（NR/HAF）的密炼机混炼相比,P（NR/HAF）在密炼机混炼时具有较高的混炼温升和较快的升温速率,使得胶料在较高的温度下被塑炼,从而表现出与传统的NR/HAF不同的密炼机混炼特性,其最佳塑炼温度有所降低。通过逐步回归分析建立的“门尼粘度-塑炼条件”模型可以较好地拟合和预测不同塑炼条件下P（NR/HAF）密炼机塑炼后胶料的门尼粘度。     

Comparison of discrete elemental modelling to experimental data regarding mixing of solids in the transverse direction of a rotating kiln

Finnie et al. [Finnie, G.J., Kruyt, N.P., Ye M., Zeilstra, C., Kuipers, J.A.M., 2005. Longitudinal and transverse mixing in rotary kilns: a discrete element method approach. Chemical Engineering Science 60, 4083-4091] developed a discrete elemental model to simulate the mixing of solids in a rotary kiln. It is interesting to analyse and compare their results to those obtained through experimental observations such as those by Henein et al. [Henein, H., Brimacombe, J.K., Watkinson, A.P., 1983. Experimental study of transverse bed motion in rotary kilns. Metallurgical Transactions B 14B, 191-205] Van Puyvelde et al. [Van Puyvelde, D.R., Young, B.R., Wilson, M.A., Schmitd, S.J., 1999. Experimental determination of transverse mixing kinetics in a rolling drum by image analysis. Powder Technology 106, 183-191; 2000. Modelling transverse mixing in a rolling drum. Canadian Journal of Chemical Engineering 78, 635-642] and Mellmann [Mellmam, J., 2001. The transverse motion of solids in rotating cylinders—forms of motion and transition behavior. Powder Technology 118, 251-270].     

Optimization analysis of the staggered herringbone micromixer based on the slip-driven method

In this paper the mixing effect of the staggered herringbone micromixer (SHM) was investigated by using the slip-driven method. This method simplified the 3D flow in the staggered herringbone micromixer into a 2D cavity flow with an axial Poiseuille flow. The solution of the 2D cavity flow was obtained by solving the biharmonic equation. An improved design with a cosine asymmetric factor P(z) was proposed, and its mixing effect was demonstrated by comparing the effect with the original design [Stroock, A.D., Dertinger, S.K.W., Ajdari, A., Mezic, I., Stone, H.A. and Whitesides, G.M., 2002, Chaotic mixer for microchannels, Science, 295: 647–651; Stroock, A.D., Dertinger, S.K.W., Whitesides, G.M. and Ajdari, A., 2002, Patterning flows using grooved surfaces, Anal Chem, 74: 5306–5312]. Four methods evaluating the mixing effect were used: (1) mixing images at different cycles; (2) Poincaré Sections; (3) segregation intensity and (4) stretching computation. Finally, an optimized value of P₀ = 1/6 was obtained, and the mixing effect of the improved design for different P₀ is discussed.     

Cohesive particle mixing and segregation under shear

Mixing and segregation is important to industries ranging from food to pharmaceuticals to ceramics. Despite the fact that there have been significant advances recently in the understanding of both free-flowing and cohesive particles, the effects of cohesion on particulate mixing and segregation in even the simplest devices is not well understood. In this paper, we theoretically and experimentally examine the cohesive (here, liquid-bridge induced) mixing and segregation in an annular shear cell. We extend previous theoretical arguments for pseudo-static particle systems to sheared beds and use our theory to develop phase diagrams that correctly predict cohesive particle mixing/segregation. Interestingly, under certain conditions mixing is stronger for small shear rates (i.e., slower stirring) than for high shear rates (i.e., faster stirring).     

Research progress of chaotic mixing in stirred tank

Chaotic mixing is regarded as an effective method to improve the mixing effect in the laminar stirred tank.To generate chaos in flow field in stirred tank,many efforts including aperiodic movement,asystematic installation impeller,etc.,were made to save mixing time and energy consumption.The computational fluid dynamics of chaotic flow field and the hyperchaotic controlling method as well as macro-instability were reviewed.Multiple flow field coupling is important in the turbulent mixing region of stirred tank.The development trends of flow field coupling and hyperchaotic controlling in chaotic mixing were prospected in energy saving operation.     

Intensification of viscous fluid mixing in eccentric stirred tank systems

The mixing process of highly viscous liquids in a small stirred tank for High Throughput Experimentation (HTE) apparatus was investigated using a visualization approach, i.e., the Planar Laser-Induced Fluorescence (PLIF) technique. Segregated regions were detected despite a long period of agitation, indicating that the mixing homogeneity can be hardly attained for the mixing of highly viscous liquid. Based on the image analysis of PLIF results, we defined a desegregating time to quantify the mixing process of viscous liquids and to compare the mixing performances under different operating conditions. Eccentric agitation proved to be an efficient way to intensify the mixing of viscous liquid for the fact of significantly reduced desegregating time under the same stirring rate.     

三层混合床在水处理装置的应用

中石油大庆石化分公司化肥厂脱盐水装置在原有双层混合床的基础上,采用新技术,将双层混合床改造成三层混床。改造后的混合床解决了浮床体内再生时中排附近阴、阳树脂交叉感染的问题,具有出水水质稳定,周期制水量大等特点。     

肥料掺混机技术改进

掺混肥料在我国农业生产用肥中具有突出的优点,江苏瑞安特重型机械有限公司因掺混肥主要生产装置掺混机的生产能力不能满足客户需求,将传统掺混机筒体内单螺旋叶片改为双螺旋叶片,并增加筒体尺寸。技改后,增加了筒体填充系数,使掺混机的生产能力由每次600~1 000 L提高到1 800~2 200 L,满足生产需求,降低生产成本。     

Assessment of mixing mechanism on the basis of concentration pattern

The method of intermingling of solid particles in a mixing operation has great significance in finding suitable equipment and conditions to render the process more effective. After a survey of various mixing mechanisms, this paper deals with the principal possibilities for their identification, and gives several methods to evaluate artificial concentration patterns resulting from simulating diffusive-type and convection-shear mixing. In addition to the frequency distribution of the sample concentrations, the correlation technique, fractal analysis, phase-space technique, etc., are discussed.