八钢生石灰消化除尘新装置

国内烧结厂在生石灰消化方面,由于除尘问题没有得到有效解决,生石灰消化器一直使用得不太好,至使生石灰的作用没有得到充分的发挥.有鉴于此,八钢自行设计了生石灰消化除尘装置,成功的解决了这一问题,既改善了工作环境,又取得了较好的效益.     

杭钢烧结生石灰消化系统环境除尘改进

介绍了杭钢2×90m2烧结生石灰消化水幕除尘设施改造、水幕除尘原理、特性和应用效果。     

提高烧结配料生石灰消化除尘效果的生产实践

通过对烧结配料生石灰消化除尘系统进行改造,提高了除尘效果,同时稳定了生石灰配加量和消化打水量;充分回收利用了消化蒸汽和二次扬尘,减少了资源浪费,提高了消化水温,进一步强化了生石灰消化作用,提高了混合料制粒效果和混合料料温;极大地改善了配料室工作环境,有效降低了检修劳动强度,提高了设备作业率。     

邯钢435m2烧结机配料室水幕除尘系统改造

在不影响混合料混匀造球、白灰消化及烧结矿成分、强度的前提下,通过对水幕除尘系统改造,改善了配料室生石灰配料点的工作环境及工人的劳动强度.充分回收利用了二次扬尘,减少了资源浪费;在一定程度上也避免了生石灰消化所造成的设备腐蚀和热量损失.     

一种新型生石灰消化及除尘装置的研究与应用

本文针对烧结厂生石灰消化系统存在的问题及其配套除尘系统的问题进行了分析,研究了一种新型烧结用生石灰消化系统及除尘装置,并在新余钢铁厂360 m~26~#烧结机应用。生产应用表明:使用新型生石灰消化及除尘装置后,烧结利用系数提高了0.018 t·m~(-2)·h~(-1),焦粉消耗降低了0.19 kg·t~(-1),粉尘排放量下降到25 mg·m~(-3),达到了节能减排的目的,改善了配料室区域的工作环境。     

烧结除尘灰混合炼钢污泥喷浆的工艺设计与应用

我公司新投产的210m^2烧结机采用了烧结除尘灰混合炼钢污泥喷浆的处理工艺，既解决了除尘灰的输送和炼钢污泥的处理问题，又促进了生石灰的消化，提高了烧结矿的产质量和稳定性，带来了良好的经济效益，而且有利于环境保护。     

烧结用生石灰所含杂质对其消化性能的影响

采用恒温量热法,针对实验室煅烧的各种生石灰试样,研究其所含SiO₂、Al₂O₃、MgO等杂质对消化性能的影响规律,并选用烧结现场使用的五种生石灰对研究结果进行验证.研究发现:生石灰的消化放热量与其CaO含量呈正相关关系,并随SiO₂、Al₂O₃和MgO含量的增加而下降;SiO₂、Al₂O₃和MgO杂质对生石灰消化速率有重要影响,当SiO₂质量分数增加至1%水平时,生石灰消化速率的降幅较大,之后则缓慢降低;少量的Al₂O₃对生石灰消化速率影响较小,但当Al₂O₃质量分数超过2%时生石灰消化速率急剧下降;随着MgO含量的增加,生石灰消化速率显著降低.      

生石灰消化器在梅钢烧结生产中的应用

梅钢3号烧结机系统由于场地位置限制导致生石灰下料后经过混合机到制粒机时间不足5min，使得部分生石灰还来不及消化就进入制粒机，不仅起不到制粒粘结作用，生石灰在制粒机里继续吸水消化膨胀，反而破坏了已制好的球，从而造成烧结混合料透气性差，严重影响烧结矿产、质量。为此，烧结分厂联合相关部门进行专题技术攻关，引进双轴式生石灰消化器，并自主研发出消化器除尘系统，很好的解决了由于生石灰比重小、粒度细、碱性强等本身固有特性导致的生石灰环境污染问题，促使3号烧结机烧结矿产、质量指标进一步优化。     

生石灰配加系统除尘技术研究

烧结机配用生石灰,旨在提高烧结制粒效果,改善透气性,同时提高混合料温度,得到行业认可,全国基本所有烧结机原料中均配用生石灰。然而配用生石灰后带来的污染问题,成为烧结行业难题。本文就水钢生石灰除尘通过探索,改造并用于生产实践,为生石灰除尘环境治理奠定了基础。     

包钢500m2烧结机混合料水分自动控制与应用

文章介绍了包钢500 m2烧结机实现混合料水分自动检测与控制的研究与应用,基于理论计算与水分仪测量相结合的控制加水理念,并充分考虑了生石灰消化加水、除尘灰加水、蒸汽预热因素的影响,首次在包钢烧结实现了混合料全自动加水,解决了水分波动的难题,为烧结提产、提质、降耗创造了条件。     

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.