系列混捏机新型搅刀轴头密封装置

混捏工序是炭素生产的主要工序,而混捏机的优劣直接影响到炭素生产制品的质量,国内混捏机普遍存在搅刀轴头易漏料的现象,由于细粉的泄漏,影响到物料的配比,严重影响产品质量,同时污染环境,也对操作者的身体健康带来了损害,因此经过详细分析并结合国内外经验,对搅刀轴头密封进行了改进.     

新型碳糊混捏设备——爱立许强力混合机简介

在生产炼钢用电极和炼铝用阳极中,各国制备碳糊使用的混捏设备,目前常用的有双Z型搅刀混捏锅和连续混捏机。生产双Z型搅刀混捏锅的工厂或公司有:英国JENKINS公司、美国JOY公司、英国BAKER RERKIHS公司、西德KHD公司等。生产连续混捏机的工厂或公司有:瑞士BUSS公司、瑞士LIST、公司美国BAKER PERKINS公司等。近些年来西德爱立许(EIRICH)公司研制的新型混捏设     

关于电极生产凉料工艺的探讨

针对我国电极生产混控成型中凉料工艺的生产现状．综合现代热媒换热技术．提出用热媒换热凉料的新工艺──在混捏机中完成混捏和凉料，并进行了综合传热分析。     

卧式双轴S型混捏机的设计与计算

在化学工业、硅酸盐工业、橡胶工业以及其他工业中用于混捏固体、散粒状(粉状)及粘糊状物料的设备烦多,分类方法也很多,本文拟就卧式双轴S 型混捏机的工作、设计计算的一般原理加以探讨。一、卧式双轴S 型混捏机的轱构与工作原理卧式双轴S 型混捏机的结构为内部平行装一对S型的铸铜搅刀,搅刀在机壳内作反方向旋转,机壳的底是由两个半圆筒形的槽构成,这样便在槽的中央构成了一个纵向脊形座。混捏机的一些主要部件如图1所     

混捏机碳化钨搅刀的补焊修复工艺

介绍了修复混捏机动搅刀表层的一种新型耐磨材料--碳化钨,根据工作实践,主要阐述了使用碳化钨材料进行动搅刀表层补焊修复时的工艺要求及经验总结.     

使用TDO—1型耐磨焊条堆焊混捏锅搅刀

山西碳素厂是以生产电极糊、阴极炭块和石墨电极为主的碳素厂,混捏锅(容积2000升)是我厂生产碳素制品的主要设备,多年来常因混捏锅中搅刀磨损快,停机检修次数多影响产量和质量,为了提高搅刀寿命,我们用兴航建筑设备厂的TDO—1型耐磨焊条,在搅     

炭素专利

公开号:CN102310463A公开日:2012-01-11申请人:河南三力炭素制品有限公司发明人:冯建国,侯皓泷发明名称:石墨电极压型四段工序均温糊料生产系统及其生产方法本发明公开了一种石墨电极压型四段工序均温糊料生产系统及其生产方法,包括干料加热器、锅式混捏机、滚筒凉料机和均温醒糊罐。将干料导入干料加热器内加热25 min,使温度达到130℃以上;将加热好的干料导入锅式混捏机中     

双层混捏机润滑系统的设计与优化

混捏机是将一定配比的炭素粒状骨料与黏结剂在一定的温度下混合揉捏成塑性糊状料的设备。双层混捏机是伴随着炭素产品向着高产高效方向的发展,而延伸出的又一种大型混捏设备。在各种炭素制品的制备工序过程中,混捏是其中最关键的     

橡胶干搅机在营根机械厂问世

橡胶干搅机在营根机械厂问世一种干胶干燥后处理设备─橡胶干搅机最近在海南农垦营根机械厂研制成功，从而使困扰胶厂多年的夹生、杂质及质量不稳诸难题均可迎刃而解。干搅机在国外已广泛使用，我国橡胶要出口到美国市场，也须经过干搅处理。海南农垦营根机械厂研制的干搅...     

吉林市吉炭工程有限责任公司

<正>吉林市吉炭工程有限责任公司,是吉林炭素集团的控股公司,是自主经营的股份制企业,固定资产二千余万元,主要经营项目:(一)各种规格混捏机、糊成型机、振动成型机、凉料机、残极破碎机、对辊破碎机,反击式、颚式破碎机、斗式提升机、电极加工梳刀等产品。(二)高压浸渍设备、煅烧炉、焙烧炉、石墨化炉等炭素炉窑的设计、制造、筑炉、安装、调试。(三)铸钢、铸铁、铸铜、机械加工,D_2级压力容器制造,炭素工程设计、制造、安装、调试。     

反向旋转卧式双轴捏合反应器混合特性的数值模拟

以差速反向旋转卧式双轴捏合反应器为研究对象,选用高黏牛顿流体糖浆为模拟物料,通过三维有限元数值模拟方法研究了高黏糖浆在捏合反应器中的流动过程,获取了流速和剪切速率的空间分布,进一步结合粒子示踪技术探究了分布混合过程与混合效率,并且考察了搅拌结构对流动与混合过程的影响规律。研究表明,捏合反应器中几乎不存在流动死区,桨叶末端和重叠区域的流速和剪切速率较高,且高流速和高剪切区域均随着捏合杆数目和捏合杆长度的增加而增大。捏合杆可以推动物料在圆周方向上的运动,在重叠区域存在周期性交互作用,进而可以强化分布混合过程。拉伸率随着混合时间以指数形式增加,且随着捏合杆数目和捏合杆长度的增加而增加。时均混合效率大于零,随着捏合杆数目的增大而增大,随着捏合杆长度的增加呈现先增大后减小的趋势。     

立式捏合机捏合间隙影响CFD分析

本文利用计算流体力学(CFD)方法研究捏合间隙对立式捏合机混合性能的影响。首先,根据立式捏合机搅拌桨叶运动特点以及被混物料的流变特性,进行立式捏合机混合流场数值模拟。其次,确定立式捏合机混合性能宏观评价指标。最后,分析了捏合间隙的变化对混合性能评价指标的影响。分析结果表明：间隙越小,立式捏合机的混合性能越好;当空心桨叶两侧的捏合间隙大小相等时,立式捏合机的功耗最小。     

Melt-mixing by novel pitched-tip kneading disks in a co-rotating twin-screw extruder

Melt-mixing in twin-screw extruders is a key process in the development of polymer composites. Quantifying the mixing performance of kneading elements based on their internal physical processes is a challenging problem. We discuss melt-mixing by novel kneading elements called “pitched-tip kneading disk (ptKD)”. The disk-stagger angle and tip angle are the main geometric parameters of the ptKDs. We investigated four typical arrangements of the ptKDs, which are forward and backward disk-staggers combined with forward and backward tips. Numerical simulations under a certain feed rate and screw revolution speed were performed, and the mixing process was investigated using Lagrangian statistics. It was found that the four types had different mixing characteristics, and their mixing processes were explained by the coupling effect of drag flow with the disk staggering and pitched-tip and pressure flows, which are controlled by operational conditions. The use of a pitched-tip effectively controls the balance of the pressurization and mixing ability.     

轴流式搅拌桨搅拌槽内混合时间的数值模拟

利用计算流体力学软件FLUENT 6.0程序计算了单层CBY搅拌槽内流体混合过程的速度场和浓度场,讨论了加料点位置和监测点位置对混合时间的影响。结果表明,拌槽内物料的混合过程主要由槽内的流体流动所控制;混合时间与加料点位置有关,在桨叶附近区域加料时混合时间比在液体表面加料时的混合时间短,应尽量在搅拌反应器的桨叶尖端处加料;不同的监测点位置对混合时间有很大的影响,在靠近槽底部进行监测所得到的混合时间最短。     

双螺杆捏合机理及其捏合段设计

定性分析了捏合段的混合及输送机理，讨论了捏合块错列角、螺棱间隙、捏合块头数、螺杆转速等因素对混合质量及输送能力的影响，并由此提出了一些捏合段设计时应注意的问题。     

PE-HD/炭黑在捏合块元件内分散混合的数值模拟研究

使用Polyflow软件,计算了3种捏合块元件内高密度聚乙烯（PE-HD）熔体的三维拟稳态流场。引入炭黑在聚合物熔体中的分散数学模型,计算了不同捏合块中炭黑聚集体的粒径分布,比较了3种捏合块流道内炭黑在PE-HD中的分散混合效果。数值结果表明,捏合盘厚度大的捏合块,剪切拉伸作用较强,分散混合能力较强。     

橡胶连续混炼新技术研究

研究了国内外橡胶连续混炼机的发展现状，特别对双螺杆挤出机的发展作了探讨．提出新的技术设计制造连续混炼机。     

Analytical and Experimental Evaluation of Dispersive Mixing Performance of Special Rotor Segments in a Corotating Twin-Screw Extruder

An intermeshing corotating twin-screw extruder is often used for producing polymer composites. In this study, we discussed mixing performance of special rotor segments in molten zone. These rotor segments have several tip clearances for achievement of self-cleaning and effective mixing, and these are named various clearance mixing technology. We studied about dispersive mixing performance of configuration, which consists of various clearance mixing technologys (various clearance mixing technology configuration) using numerical analyses and experiments. For the analytical evaluation of mixing performance, we have adopted a particle tracking method. As evaluation indices of dispersive mixing performance, we focused on following three values (1) maximum value in a history of first principal stress of each particle, (2) time-integrated shear rate of each particle, and (3) time-integrated first principal stress of each particle. And we made the probability distributions of the indices. We adopted weighted probability as approximation of volume probability in each region. The results were compared with those of kneading disk segments configuration (kneading disk configuration). Furthermore, we validated the accuracy of the analytical evaluation by performing experiments under same conditions as those of numerical analyses. For the experimental evaluation of mixing performance, we used twin-screw extruder. Polypropylene was selected as suspending media. And CaCO₃ was selected as filler. To compare just the mixing performance of various clearance mixing technology configuration with that of kneading disk configuration, side feeding and screw configuration which had third mixing segments zone were adopted. From the experimental result, it is found that various clearance mixing technology configuration dispersed better than kneading disk configuration. And from the comparison between the experimental evaluation and the analytical evaluation, it is found that the first principal stress is more appropriate for evaluation index of dispersive mixing. Finally, it can be mentioned that various clearance mixing technology configuration has better mixing performance than kneading disk configuration, and large stress is important for dispersive mixing.     

啮合异向双螺杆挤出机中捏合块元件对PE-HD/PS不相容体系混合效果的研究

在常规啮合异向双螺杆上引入不同错列角和不同捏合盘厚度的捏合块元件,将其用于高密度聚乙烯/聚苯乙烯（PE-HD/PS）不相容体系的混合,观察混合体系的相态并分析分散相的粒径。结果表明,增加捏合块元件后啮合异向双螺杆挤出机的分散混合能力得到了提高;捏合块的错列角和捏合盘的厚度对PE-HD/PS不相容体系分散相PS的重均粒径和粒径分布指数有较大影响。     

复合材料与风机叶片

介绍了风机叶片研发的趋势以及复合材料叶片设计、分析、材料、制造和试验验证的相关技术,给出了碳纤维在叶片上应用的现状和前景以及有关叶片的新兴技术。提出了发展我国叶片技术的相关建议。