首钢矿业公司烧结机台车加宽改造

为了扩大烧结产能，首钢矿业公司烧结厂对1号烧结机台车采取了整体加宽改造，使烧结机面积由原来的198m^2增加到224m^2。栏板高度由原来的550mm增加到700mm。单机产量有了较大提高。取得了明显效果。     

鞍矿东烧厂厚料层烧结生产实践

烧结厚料层操作可提高烧结矿质量、改善烧结矿质量、降低能耗。鞍矿东烧厂为了采取这一新工艺 ,将 2号烧结机进行了一系列改造 ,其中包括将台车挡板高度由原来的 370 m m提高到 5 0 0 mm,收到了良好的效果。     

承德钢铁360m~2烧结机“跑偏”原因分析及治理措施

为了纠正台车跑偏,稳定设备运行,降低烧结机漏风率,提高产质量,炼铁事业部对360 m~2烧结机跑偏组织了攻关实践。分析了影响烧结机跑偏的因素并制定相应的纠偏措施,主要对头部星轮齿板、头部弯轨、轨道、滑板等一系列设备采取测量分析并实施了跑偏处理,治理后跑偏量由原来的12 mm下降到3 mm,漏风率降低1.5%,故障率由3.2‰下降到0.09‰。     

提高105m~2烧结机料层的生产实践

河北敬业集团105 m2烧结机在国内精粉比例偏高的不利因素下,通过控制混合料水分、提高混料系统造球、合理控制燃料质量等措施,使烧结料层由550 mm提高到680 mm,烧结机的利用系数、固体燃耗、返矿率、烧结矿的转鼓强度均有较大提高。     

改善八钢烧结混合料制粒效果的实践

运用过程失效模式分析、正交试验设计、回归分析等质量改进手段,找出了影响八钢新区两台265 m2烧结机混合料制粒效果的关键因素,并在此基础上采取相应改进措施,使混合料中+3 mm粒级从原来的67.3%提升至70.2%,烧结机利用系数明显提高。     

360m~2烧结机篦条糊堵原因及改进

针对唐钢360m~2烧结机台车篦条糊堵现象分析了原因并提出了改进措施。通过减少烧结过湿层厚度,烧结终点温度下限由400℃提高到440℃,铺底料厚度由40 mm增至70 mm,利用专用工具清理糊堵篦条,增加烧结机篦条振打装置等措施,解决了烧结机篦条糊堵问题,烧结生产恢复正常。     

宣钢360m~2烧结机提高料层厚度生产实践

针对宣钢烧结作业一区1#360 m~2烧结机受设备、工艺等因素影响,料层厚度不能达到750 mm的问题,围绕提高料层厚度进行了一系列设备改造和工艺优化。利用年修机会,将烧结机台车挡板加高,由750 mm增加到800 mm;缩小布料辊间隙至3 mm。优化原料品种结构,控制燃料粒度,治理漏风;烧结机的利用系数提高了0.05 t/(m~2·h),返矿率降低0.44%,固体燃料降低3.8 kg/t。     

提高烧结机产能的措施

介绍了唐山国丰2台72 m2步进式烧结机停产后,为了给高炉提高足够的烧结矿,对2个炼铁厂6台烧结机进行的设备及工艺技术改造.改造后,烧结机产能明显提高;烧结设备作业率由97％提高到98％;漏风率由60％降低到40％,满足了高炉生产需要.     

提高360m2烧结机烧结矿碱度稳定率的研究

烧结矿碱度稳定率直接关系到高炉生产的稳定,同时也会影响到高炉的各项经济技术指标。2020年天津钢铁集团有限公司360m2烧结机大修后,烧结矿产量和质量都得到了明显提高,但由于360m2烧结机的混匀矿是由原料配料室直供,造成烧结混合料成分稳定性差、烧结成品矿碱度波动大,已影响到高炉生产的稳定。本文对影响360m2烧结机烧结矿碱度稳定率的因素进行了分析,确定了影响烧结矿碱度稳定率的原因,并提出了工艺改进措施。通过提高原、燃料成分稳定性、降低混匀配料工序混匀矿成分波动、降低烧结配料工序烧结混合料碱度波动等工艺措施的实施,360m2烧结机烧结矿碱度稳定率显著提高。     

超厚料层烧结混合机强混制粒改造

烧结混合料的粒度组成对于烧结料层的透气性具有较大影响,天钢联合特钢针对两台230 m~2烧结机配备的二次混合机进行了改造,包括加热水混料、二混锥形逆流螺旋衬板等,制粒效果明显改善,烧结机利用系数由原来的1.646 t/m~2·h~(-1)提高到平均1.738 t/m~2·h~(-1),其中料层厚度达到1 000 mm,快速实现了生产稳定运行。     

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。     

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.     

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。     

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.     

Quality of life of relatives of mental patients

Usage of quality of life of psychiatric patients' relatives as the parameter of estimation of the quality of psychiatric care is considered. By means of standard questionnaire elaborated by the authors as well as by means of both individual and group conversations the quality of life was analyzed in 40 relatives which lived together with psychiatric patients. Different spheres of their life and difficulties (financial, social-psychologic, production) were examined in families with such patients. The defects of psychiatric care that had direct influence on the quality of life of the psychiatric patients' relatives are outlined.     

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)