实心胶轮传动混合机在攀钢烧结上的应用

圆筒混合机是烧结生产必备的关键设备。本文拟对攀钢烧结生产过去使用的齿轮传动方式混合机所存在的缺点分析，通过采用新技术，使用胶轮传动方式混合机后所带来的良好经济效益及社会效益，阐述了胶轮传动混合机在攀钢烧结生产中的应用价值及推广价值。     

对SHG40210圆筒混合机主传动所需功率的计算

通过分析圆筒混合机功率的影响因素,选取合适的混合机传动功率,是大型混合机设计的重要条件之一。以SHG40210圆筒混合机为例,对混合机主传动所需功率进行设计计算,确保产品设计合理、准确,满足用户对产品的功能要求。     

Φ3.6 m×14 m实心胶轮传动圆筒混合机在冶金企业中的应用优势

结合河南某冶炼厂混矿生产的特点,对Φ3.6 m×14 m圆筒混合机的齿轮传动、实心胶轮传动和充气轮胎传动等三种传动方式的结构和特点进行对比分析。经过综合分析,实心胶轮传动圆筒混合机在这种混矿生产中具有运行稳定、振动小、噪声低、初期投资少、制造周期短、运行成本低、故障率低、维修简单、节能等优点。     

Φ3m×1.2m圆筒混合机减速机技术改造

针对圆筒混合机减速机寿命低的问题．对圆锥圆弧齿轮的结构、实际运转状态及受力情况等进行了分析，认为垂直传动的结构不合理、圆锥圆弧齿轮齿形在冲击交变载荷的作用下易断齿等是造成减速机频繁损坏的主要原因，改造采用硬齿面渐开线斜齿轮减速机．传动精度高．运行平稳可靠，年创效益达36．4万元以上．     

二次混合机改为实心胶轮摩擦传动圆筒混合机

太钢烧结厂二次混合机由充气胶轮摩擦传动圆筒混合机改为实心胶轮摩擦传动圆筒混合机,使用效果非常好,有推广应用价值。     

柔性传动圆筒混合机的开发与应用

圆筒混合机主要用于钢铁和有色金属冶炼烧结物料的混合和制粒作业。柔性传动圆筒混合机是新型物料混合制粒设备。分析了圆筒混合机传统设计中存在的问题 ,介绍了柔性传动圆筒混合机的研制和使用情况。     

混合机传动胶轮的磨损分析与改造

针对充气胶轮传动混合机胶轮磨损严重的问题，从设计，使用和维护几方面进行了分析，并在此基础上对混合机的传动系统和胶轮进行了改造，使胶轮的使用寿命延长到16个月。     

烧结混合机的改造实践

介绍烧结筒混合机采用钢支承柔性传动结构及硬齿面减速机,优化混合机工艺参数,提高设备综合性能和作业率。     

一次混合机改为胶轮传动

1 前言杭钢24米~2烧结机原用φ2.8×6米一次混合机一台。其倾角2°30′,转速6转/分,传动系机械齿轮传动。原设备存在混料时间短、设备振动大、噪音较大等问题。于1985年底对一次混合机进行了改造,降低了倾角,延长了混合机的长度,改机械齿轮传动为橡胶轮摩擦传动。     

新型圆筒混合机的结构特点浅析

通过分析现有圆筒混合机的结构特点与不足,提出了一种新型混合机结构,橡胶轮胎仅作为支撑结构,筒体由液压马达或电机驱动,传动形式采用特殊设计的两点啮合销齿传动,与传统混合机相对比,详细分析了该结构的主要特点,表明新型圆筒混合机可实现节能减振的高效混合过程,具有较好的应用前景。     

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)     

Comparison of rates of infection of two methods of emergency ventricular drainage

The rates of infection of two methods of external ventricular drainage in use at Atkinson Morley's Hospital--namely, (a) percutaneous drainage with Rickham reservoirs and (b) tunnelled ventriculostomies--were compared in this retrospective review. Percutaneous drainage of CSF with Rickham reservoirs was associated with a 27% rate of infection as identified by positive microbiological cultures; tunnelled ventriculostomy catheters had a 10% infection rate. The difference in the infection rate between the two methods was statistically significant (P < 0.015). Other variables examined, including the age and sex of the patients and the reasons for ventricular drainage, were not associated with an increased rate of infection. Most infections from either method were caused by a coagulase negative staphylococcus. The average duration of ventricular drainage before identification of positive cultures was 5.7 days for Rickham reservoirs and 6.0 days for ventriculostomies.     

浅析《野草》的版画特征

鲁迅先生一生热爱美术作品,对版画中木刻兴趣尤甚.<野草>作为其"写心之作",亦呈现出一些与木刻版画一致的审美特征:一是具有木刻版画的色彩特征,多对比、多冷色,有阴郁的美感;二是具有木刻版画的力度特征,环境描写、人物刻画处处刀锋毕现,遒劲有力,有一种"力之美".     

四辊破碎机车刀架的改造

针对四辊破碎机车刀架车削中存在的几个问题,详细介绍了电动车刀架的结构和工作原理,建立主要设计参数的数学表达式,并进行适当的分析。改造后,这种电动车刀架运行平稳、可靠、方便、省力,取得了预期的效果。     

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.