变频调速式谷物烘干机研究

针对谷物烘干过程存在的问题 ,在理论研究的基础上 ,研制了变频调速式的谷物烘干机 ,并对该烘干机的工作性能进行了理论分析和试验研究。该烘干机可实现多种烘干过程 ,满足不同产品的烘干工艺。以对烘干过程要求严格的稻谷为例 ,说明了变频调速式谷物烘干机的烘干效果     

高硫铜精矿全氧化沸腾焙烧

近几年来,我公司冶炼厂采用大型沸腾炉处理本公司自产的铜精矿。经过四年的摸索与试验,已基本掌握了高硫铜精矿全氧化沸腾焙烧的操作技术,对提高沸腾焙烧炉的产量,增大焙砂中的残硫,积累了一定的生产经验。     

无人化智能行车在精矿库的应用和关键技术探究

精矿库主要用来接收、存储铜精矿、渣精矿、石英砂和部分中间物料,并进行高效配置和输送等操作,为闪速炉用料需求提供保障。精矿倒运过程中易造成库区粉尘飞扬、作业环境恶劣、操作人员作业强度高、设备故障频繁和作业效率低等难题,限制了生产效率提升。研发无人化智能行车,并投入使用成为当务之急。     

铜精矿蒸气干燥机设计分析

简要的介绍了铜精矿蒸气干燥工艺的工艺流程、工作原理,并着重对蒸气干燥机设计结构进行剖析     

脉冲气流输送系统在硫酸锌生产中的应用

随着生产过程日趋自动化,对节约能源和环境保护的要求越来越高.河北远大动物药业有限公司利用炼钢烟气粉尘生产硫酸锌,针对硫酸锌烘干后温度过高、烫损包装袋的问题,将冷却与脉冲气流输送相结合,对烘干后的硫酸锌温度进行自由调节,实现了硫酸锌烘干后冷却包装的自动化生产,取得了较好的经济效益和社会效益.     

进口铜精矿采购对策和建议

通过对国内外铜精矿供应、加工费用、需求趋势的调查,预测出今后国际铜市场的发展趋势。并根据白银有色金属(集团)公司的实际情况,提出了2006年公司进口铜精矿采购对策和建议。     

矿渣煤干系统技术改造

为了提高热效率,改善环境,鲁碧公司对矿渣烘干系统进行改造,采用高温烟气节能型沸腾炉替代回转炉箅层煤燃烧室,并改进烘干机内部扬料装置。运动结果表明,改造后的系统烘干机的热效率提高,台时产量由9．5t/h提高到14．6t/h,烟煤消耗由70kg/t降至50kg/t,经济效益显著,且改善了环境。     

烘干机炉头改造

在焦粒、焦粉生产及焦炭深加工过程中,对焦炭水份含量的要求较高,故焦炭烘干是保证产品质量的重要环节。镇江焦化公司原滚筒烘干机炉头部分结构设计及自动调控上存在诸多缺陷,一直困扰和束缚着企业的生产和发展,结合烘干机结构特点、燃料、温度调控等方面因素,对炉头进行改进,其整体采用钢结构,废弃原炉膛部分,增加行走轮装置,增设柴油燃烧系统,在煤气管路上增设自动调控装置等。     

BHP向中国金龙铜业支付每吨36美元铜精矿加工费

中国行业消息人士称,全球多角化矿业巨擘BHPBilliton已经同意今年向中国金龙铜业公司支付每吨36美元的铜精矿加工费,以及每磅4.0美分的精炼费。参与BHP公司和金龙铜业谈判的这位企业高层人士并未告知去年的费用水平.但此前预估为两公司将就削减2004年加工费达成一致,原因是全球铜精矿供给紧张.     

综合料场喷淋降尘系统设计方案

论述了储运公司料场粉尘的处理方案,即采用先进的喷雾重力降尘技术,该技术具有降尘快,效率高,节水、节能等优点,而且操作方便,可实现手动或自动操作功能。     

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.