混合机在线清料装置的研发与应用

为了解决钒钛磁铁矿烧结混合机粘料所带来的不利影响,研发了一种混合机在线自动清料装置。该装置的研发与应用提高了混合机的制粒效果,彻底杜绝了烧结机工序因混合机粘料而被迫停机的问题,降低烧结机故障停机率1.47%,且烧结过程主要参数和烧结矿主要经济技术指标均得到了明显的改善。     

烧结机台车在线更换装置的应用

烧结机是生产烧结矿的主要设备,而当前故障台车的更换耗时长、劳动强度大。本文讲述的烧结机台车更换装置将烧结机头部外曲轨分为三部分,采用简单易维护的结构,实现了台车在线自动无料更换,提升了生产效率,大大降低了台车更换对烧结矿产量的影响,提高了烧结生产的自动化水平。     

湘钢烧结机(105 m2)主要工艺及设备特点

介绍了湘潭钢铁公司二烧二期105 m2烧结机的工艺和设备特点,主要包括燃料预筛分、自动称量配料、延长混合制粒时间、厚料层烧结、幕帘式点火器、完善的整粒系统以及混合制粒机、105 m2烧结机、126 m2鼓风带冷机.     

张钢24m2烧结机技术改造及生产实践

通过新上核子秤微机自动配料系统 ,改造台车滑道、密封滑板及混料、布料系统 ,加高台车料层等 ,张钢对 2× 2 4m2烧结机进行了系列改造 ,实现了小球团烧结生产 ,使烧结矿的技术经济指标明显改善 ,烧结机利用系数由 1.5 8t/m2 .h提高到 1.75 t/m2 .h     

综合料场设备自动化控制系统的开发与应用

莱钢为适应265m^2烧结机和1880m^3高炉的需要,新建机械化综合原料场,采用仪电合一方式对受卸系统、一次料场、混匀料场、供料系统等进行自动控制。系统具有料流的控制与联锁、配料圆盘给料机的变频控制、大型可移动设备的控制、与烧结机控制系统的网络通讯、完善的人机界面等控制功能,实现了料场生产工艺设备的自动启停及电气联锁保护、工艺生产过程的数据处理、PID回路自动调节等功能。     

太钢二烧100m^2烧结机主要工艺和设备特点

本文介绍了太钢二烧１００ｍ＾２烧结机的工艺和设备特点，主要包括燃料预筛分１自动重量配料、自动重量配料、延长混合机造球时间、厚料层烧结、多缝式烧嘴点火器以及完善的整粒系统。     

武钢二烧铺底料系统改进

烧结机铺底料的布料是影响烧结机正常生产的重要环节。二烧车间通过对铺底料系统的一系列改进与优化,使铺底料布料效果得到了改善,烧结的各项技术经济指标都有所提高。     

石钢全外矿烧结生产实践

针对外矿原始粒度大,褐铁矿比例高、烧损大的特点,石钢公司烧结厂在确保烧结矿质量的前提下,通过制作安装可调式自动压料装置、提高燃料配比、混匀料二次加水、合理调整烧结工艺参数等措施,280 m2烧结机实现了全外矿烧结,有效降低了铁前成本。     

烧结机自动卸灰技术应用实践

通过对烧结机卸灰系统实施技术改造,实现了卸灰系统自动放灰的目标,满足了烧结灰料定时定量排放的要求,同时也降低了烧结漏风率,减少了备件损耗,达到了节能降耗、清洁生产的目的。     

解决烧结机台车间漏料的几种对策

概述了现代大型烧结机台车间漏料的特征及其危害性,结合台车的具体结构及实际安装情况,对台车间漏料的原因进行了分析.在此基础上,提出了从烧结铺底料、台车隔热垫及台车本体人手,解决烧结机台车间漏料的方法.     

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.