精密微孔过滤机在超细粉末过滤与洗涤应用

简述了超细粉末在过滤、洗涤的特性,并介绍了高效精密微孔过滤机的原理及特点,通过超细碳酸钴粉末的生产实践证明:采用微孔过滤机进行洗涤过滤可大大提高物料的洗涤效率,减少洗水用量,提高金属回收率。并且采用机内顶洗涤,过滤与洗涤于一机内,不需将滤饼来回人工转移,使产品不受外界污染。确认完全适宜微米级与亚微米级的超细粉体生产中的过滤与洗涤工序。     

微米与亚微米级粘细微粒的精密过滤与滤饼洗涤

简述了微米与亚微米级粘细微粒在过滤、洗涤时的特性，并详细地介绍了高效精密微孔过滤机的特点及其用于微细颗粒物料过滤、洗涤的成功实例。     

稀有金属超细粉体的精密微孔过滤

对精密微孔过滤技术作了较为系统的介绍,分析了该技术用于稀有金属超细粉体的高效洗涤、过滤与压干工序中所具有的特点和优势,并提出了推广这一先进技术的合理建议. 稀有金属;超细粉体;亚刚性微孔滤材;精密微孔过滤     

陶瓷过滤机在金隆硫酸石膏工序的应用

介绍了陶瓷过滤机的工作原理,通过对影响陶瓷过滤机处理石膏的因素——陶瓷板材料、过滤微孔尺寸、陶瓷板洗涤、石膏浆液颗粒、石膏浆液浓度的摸索,首次实现陶瓷过滤机在石膏生产上的应用,使陶瓷过滤机过滤石膏能力达到设计并连续稳定运行。在投资、电耗、维修、操作等方面的比较,陶瓷过滤机与离心机相比具有设备投资低、电耗显著降低、操作简单、维修方便的优点,为硫酸及其他行业处理石膏提供有益经验。     

铀矿石加工中的固液分离——浓密与过滤孰好?

过滤各种类型的过滤机,均可用于矿浆洗涤。最为著名的是广泛用于南非金矿加工的转鼓真空过滤机。1960—1980年间,法国西部矿业公司福雷工厂使用转鼓过滤机洗涤铀矿浆。带式过滤机是近期采用的设备,南非和美国已广泛用于洗涤铀矿浆。在法国,自1973年起,福雷工厂开始对带式过滤机的应用进行研究。目前,这种过滤机几乎已在核材料总公司及其子公司的各工厂普遍采用。     

水平带式真空过滤机过滤锌浸出渣

水平带式真空过滤机是一种新型高效过滤设备。文章介绍了过滤机的结构、工作原理及过滤机过滤、洗涤效果的测定数据，讨论了影响过滤机工作及效能的因素。     

纯水制备工艺研究

生产氯化稀土和氧化稀土材料需要纯水制配溶液和萃取剂及产品洗涤，以保证产品质量。工艺对纯水水质的有机物、微生物、细菌、颗粒等无特殊要求，故采用自来水→微孔过滤机→自动切换钠离子交换器→电渗析器→阳床→阴床→混合床→精制混合床→纯水用水的工艺流程。该流程水质可满足用户要求。     

PVF精密滤材及新型YG系列油过滤机

1.简介 四川省成都青白江过滤器材厂,是生产PVF高分子微孔塑料制成的系列滤材、滤芯和不同精度等级过滤机的专业厂,YG型系列油过滤机已于1989年9月通过冶金部鉴定,该机结构合理、设计新颖、多级串联,过滤全机整体安装在四轮小     

橡胶带式真空过滤机替代沉降槽在洗涤赤泥工业中的应用

介绍了当前赤泥洗涤存在的问题和橡胶带式真空过滤机替代沉降槽在赤泥工业中的应用情况。在此基础上,指出橡胶带式真空过滤机在赤泥洗涤过滤过程中存在的问题及其改进措施。实践证明,在减少沉降槽数量的情况下,通过对橡胶带式过滤机的改造,提高了过滤产量,增大了洗涤热水流量,降低了赤泥附损,提高了氧化铝的净溶,延长了滤布的使用寿命。     

真空带式过滤机在镍钴粉体材料生产中的应用

真空带式过滤机是一种自动化程度较高的新型固液分离设备。它利用物料重力和真空吸力实现高效固液分离,将过滤与洗涤融为一体,具有洗涤效率高、卸除方便、滤带使用寿命长等特点。本文介绍了真空带式过滤机的工作原理及其在镍钴粉体材料生产中的应用。     

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。     

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。     

Concept of freedom of infection of animal flocks

Totally negative results of epidemiological investigation of random samples do not prove the absence of the infection as the pathogen may be restricted to only a few animals in the herd for a long time. The statement "absence of infection" is critical for such situations. The question is raised, whether the statement "absence of infection" should be generally avoided. Classification of herds and flocks according to the prevalence of the pathogen would be more valid for the implementation of control measures.     

显微维氏硬度测量不确定度评定

对显微维氏硬度测量不确定度进行评定，建立了不确定度计算的数学模型，确定了影响实验结果的各项因素，计算出了各因素的标准不确定度，得出结果的扩展不确定度，并给出最终测量结果的表达式。     

Comparison of the results of surgical and conservative treatment of fractures of the diaphysis of the tibia

In this paper is treated the fundamental problematic of the fracture of the diaphysis of the tibia and the therapeutic results after the conservative and operative treatment are confronted. Among 518 patients with 433 open fractures and 35 with closed fractures of the diaphysis of the tibia, successful treatment of more 2/3 was obtained in the period from 1968 to 1972. Following our casuistics and literature, whose results are similar, we find out that the average total treatment of the osteosynthesis of the fracture of the diaphysis was shortened for 2,5 months depending upon the type and the localisation of the fracture. Apolied methods of the operative and conservative and conservative treatment in relation to the velocity of the medical cure as well as to the extreme anatomical-functional results are analised. We noticed that osteosynthesis, made by the intermedullary nail and the extension of the canals or by a small AO table, by the achieved stability makes conditions of immediate motions and an early rehabilitation. Because of that it gives the best functional results.     

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.