溢流型球磨机进料口密封装置的改进

分析了溢流型球磨机进料口矿浆泄漏的原因以及泄漏后给球磨机润滑系统和环境所带来的危害。通过对溢流型球磨机进料口密封装置的改进,减少和杜绝了矿浆泄漏,改善了球磨机运行环境,延长了润滑油使用周期、提高了球磨机有效作业率,降低了球磨机运行成本。     

大型球磨机订购（制造）设计联络中零部件结构优化的探讨

针对大型球磨机使用中存在的问题，对球磨机主要零部件结构缺陷进行分析并提出解决方案。通过设计联络，提前对球磨机主要零部件结构进行优化，消除设备缺陷。大型球磨机设计联络中对主要零部件结构进行优化，对提高球磨机的运转率有着事半功倍的作用。     

球磨机振动的分析和解决办法

球磨机的使用范围通常在水泥、建材、化肥等生产领域,具体的使用功能主要是将这部分材料在粉碎之后再进行细致粉碎,从而得到达到需求的物质材料。球磨机是依靠齿轮传动工作,在工作过程中球磨机常会出现振动的现象,了解到球磨机振动的原因,可以有效的提高球磨机的工作效率,保持球磨机的正常运行。本文对球磨机的振动原因进行分析,提出相应的解决方法发,供同行参考。     

中型溢流型球磨机筒体衬板形状及安装技术优化实践

包头鑫达矿业公司选冶厂通过改变球磨机筒体个别衬板形状,避免了球磨机衬板使用后期,球磨机内磨矿介质及矿浆对球磨机衬板夹角位置筒体的冲蚀,减少了球磨机筒体的磨损.利用小型卷扬机实现了安全快速地更换球磨机筒体衬板的目的,更换时间缩短了30 h左右,可供其他中型溢流型球磨机更换衬板参考借鉴.     

球磨机振动分析与故障排除

球磨机是岩金矿山选矿厂矿石破碎系统,再细磨的关键设备,振动是球磨机常见故障,引起球磨机振动的原因较多。详细介绍了由球磨机基础不均匀下沉、联轴器同轴度误差等综合原因引起的球磨机振动的检测、分析方法,提出了球磨机振动解决方案及施工方法,并对该方案进行研究论证。生产实践表明,采用在底座下部加垫的方法对球磨机各部件高度和水平度进行调整是解决球磨机振动较好的方案。     

球磨机腔形结构优化及其数值模拟分析

球磨机作为应用广泛的粉磨机械,其磨矿效果一直是研究人员关注的问题。本研究从球磨机腔形结构出发,提出了一种椭圆腔形结构的新型球磨机。并针对物料在球磨机内的运动特性,建立了物料运动的动力学模型。采用离散元软件EDEM,从转速差、粉磨效率、物料之间以及物料与磨料介质之间的碰撞摩擦能三个方面,对所提出的椭圆腔形结构球磨机与传统的圆筒腔形球磨机进行数值模拟对比分析。结果表明,所提出的椭圆腔形结构球磨机的磨矿效果大幅提升。物料相对于球磨机筒体的转速差增大;物料的粉磨效率提高;球磨机内物料死区减小,物料之间以及物料与磨料介质之间的碰撞摩擦增多,碰撞摩擦能增大。     

球磨机理论转速的研究

通过对钢球在球磨机筒体内的受力分析，推导出球磨机的理论工作转速，由此揭示目前的球磨机处于低效率的原因。同时，根据球磨机衬板与钢球之间的磨擦系数为０．０９５￣０．３０的实际情况，指出了提高球磨机磨矿效率的途径。     

Φ3.6×8.5m球磨机小齿轮频繁损坏的原因及解决方案

<正>对球磨机小齿轮频繁损坏的原因进行分析,综合各方面的因素确定问题并提出解决方案,确保球磨机稳定安全运行。球磨机是氧化铝生产线的初始部分,其主要作用是为后续生产线提供合格粒度的矿浆,球磨机如出现故障必将导致后续的车间完不成生产任务,带来巨大的经济损失,球磨机的稳定运行对于整个     

矿山球磨机的安装与调试方法

本文主要分析了矿山球磨机的安装以及调试方法,重点分析了安装与调试工作开展的基础和内容。分析矿山球磨机的安装与调试方法可以有效地促使矿山球磨机更好的发挥其性能,满足矿山开采的使用需求,解决其安装问题。通过分析矿山球磨机的安装和调试方法,不断推进矿山球磨机的设备组件以及各系统的高效运行和全面应用。     

新华钼业改造高能耗设备

新华钼业1系列φ2．7m×2．1m球磨机已服役多年,球磨机简体、端盖、中空轴等磨损严重,已到了使用年限,继续使用存在较大的安全隐患。日前,新华钼业选矿厂1系列φ2．7m×2．1m球磨机改造工程启动。由于该球磨机的传动系统轴瓦是乌金瓦,球磨机自重大,断油后轴瓦急剧升温,     

转炉炉壳热应力分析

根据实际转炉建立实体模型。以有限元为手段,考虑了炉衬和炉壳材料的物性参数随温度变化的特点和炉衬与炉壳之间膨胀间隙,计算了转炉炉壳在温度载荷和炉衬膨胀压力同时作用下的热应力。所得结果可为转炉炉壳设计提供依据。     

焦炭热性能指标意义浅析

通过对焦炭在高炉内的历程及其变化规律的剖析,阐述焦炭热性能指标的意义,形象地把焦炭在高炉内的损耗分为三部分(M1,M2,M3)。指出M2对焦比及焦炭价格有一定的指导作用。     

Results of treatment of cancer of the cardia

Cancer of the cardia is traditionally discussed with cardiac cancer of the lower portion of the esophagus and upper gastric cancer invading the esophagus, and the specific characteristics of cancer of the cardia have never been clearly defined. We reviewed the outcome of 172 patients with adenocarcinoma of the cardia who had undergone radical surgery between 1949 and 1994 in the Division of Gastrointestinal Surgery of the Cancer Institute Hospital. The centers of the tumors were located within 2 cm above and below the boundary between the esophagus and the stomach, and their longitudinal diameter was less than 8 cm. We divided the patients into an early period (1949-1979; n = 79) and a late period (1980-1994; n = 93), and focused on the historical transition. There were no differences in patient gender or histology between the two periods. However, the late period was associated with fewer cases of esophageal invasion and shorter longitudinal diameter, as the age of the population advanced. The number of advanced cancers such as the localized and infiltrative type had decreased, and early cancer and early clinical stage had become more common, but despite the fact that the number of early cancers had increased, extended dissection, such as thoracic and paraaortic lymph node dissection, was performed more frequently. By clinical stage, the long-term outcome markedly improved in Stage I patient in the late period, and tended to improve in Stage II and III patients. This appears to have been attributable to the prevention of micrometastasis by extended dissection, although the number of early cancers is another major potential cause. There were no differences in the outcome of Stage IV patients between the two periods, and further advances in multimodality therapy must be awaited. The range of resection is basically proximal gastrectomy, and if there are adequate indications, the prognosis is favorable. In view of the status of lymphatic flow and lymph node metastasis, and long-term results, lateroaortic lymph node dissection is important. Since the number of early cancer patients has been increasing, if intraabdominal recurrence is prevented, intrathoracic lymph node dissection will contribute greatly to the outcome of such patients.     

The effect of amount of possession of the trait of hostility on accuracy of perception of hostility in others.

Some theories of personality hold that an individual's perception of others is influenced by his own personality characteristics; more specifically, that a trait of low social value will be projected more into others, and that insight into the possession of these characteristics reduces this distortion. These 2 hypotheses were tested by having a group of college students rate each other (including themselves) on degree of friendliness or hostility. Agreement with group rating about self yielded the insight score. In general, the hypotheses were supported; the "friendly" Ss were most accurate in their perception of others, and insight was positively associated with accurate perception. From Psyc Abstracts 36:04:4HL16M. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Effect of antibiotics of chemotaxis of human leukocytes

The effect of 20 different antibiotics on chemotaxis by human neutrophils was studied. Human leukocytes incubated with chloramphenicol, rifampin, sodium fusidate, and tetracyclines in vitro showed markedly depressed migration. The mechanisms by which these antibiotics affect leukotaxis are discussed.     

Quality of life of relatives of mental patients

Usage of quality of life of psychiatric patients' relatives as the parameter of estimation of the quality of psychiatric care is considered. By means of standard questionnaire elaborated by the authors as well as by means of both individual and group conversations the quality of life was analyzed in 40 relatives which lived together with psychiatric patients. Different spheres of their life and difficulties (financial, social-psychologic, production) were examined in families with such patients. The defects of psychiatric care that had direct influence on the quality of life of the psychiatric patients' relatives are outlined.