降低吨钢铁水量的转炉冶炼工艺

采用变量法精确确定了吨钢入炉铁水量调整后转炉系统的热量亏空,通过优化调整转炉造渣物料结构,减少强冷却效果物料的使用量,配加反应速度快、升温效率高的碳-硅质发热剂,稳定解决了吨钢铁水量降低所带来的转炉系统热量不足的问题,提高了入炉废钢比。在工业生产顺行的基础上,80 t转炉入炉铁水量由860 kg/t钢降低到800 kg/t钢。     

宣钢铁水处理系统的技术优化

宣钢通过开发应用强化防断裂罐衬和铁水罐罐坑改型,对铁水处理系统进行技术优化,解决了铁水处理系统能力不足生产难题。缓解了产能扩大与局部设备、设施不匹配的生产组织制约,保证了铁后生产组织的稳定顺畅。     

昆钢新区2500m~3高炉的经济最低入炉品位

对昆钢新区2500m~3高炉的经济最低入炉品位进行了研究。高炉开炉以来,入炉品位一直低于54.5%,最低时仅50.78%。通过对开炉42个月以来的生产数据进行统计分析,从燃料比、铁水成本、煤气利用率、铁水质量指标等方面,讨论了经济最低入炉品位。认为昆钢新区2500 m~3高炉在当前条件下的经济最低入炉品位为53%。2015年以来,入炉品位始终控制在53%~54.5%,铁水成本稳定在1 500元/t左右。     

攀钢铁水二次脱硫探讨

从工艺、技术和经济上对攀钢铁水的二次脱硫技术进行探讨，为解决生产低硫或超低硫钢时入炉铁水（或半钢）硫含量高的问题，提供一条措施思路。     

加强生产组织协调 提高转炉生产节能水平

总结降低转炉能耗的措施:保持生产系统的连续、紧凑、均衡、稳定;转炉负能炼钢;减少或避免铁水铸块;提高铁水罐的周转速度;提高铁水入炉温度,稳定铁水成分;提高产品质量;提高红钢的热送热装率。     

转炉入炉铁水温度低的原因分析及其对炼钢的影响

系统分析了新钢公司一钢厂转炉入炉铁水温度低的原因及铁水温度对炼钢的影响，提出了提高铁水温度的措施及转炉应对低温铁水的办法。     

低铁耗条件下提高转炉废钢比的冶炼工艺研究

为进一步提高转炉废钢比,降低铁水单耗,通过废钢斗改造、料仓配加焦炭进行热补偿等途径,成功解决了高废钢耗条件下入炉铁水热值不足的问题,并实现单斗废钢重量提高到25.5t,平均废钢比从19.2%提高到24.7%。     

高炉控制铁水砷含量的研究

由于高炉原料无法完全脱除砷,进入高炉后将导致铁水含砷量过高,从而影响炼钢工艺及钢材质量.通过控制入炉全铁含砷量、铁水温度、碱度、炉顶压力等参数,高炉获得了较高的铁水脱砷率,得到符合生产要求的铁水.试验表明:当入炉全铁砷含量、铁水含硅量、R2、渣比、铁水温度、炉顶压力分别控制在0.015%、0.4%、1.20、400 kg/t、1 490℃、220 kPa时,铁水脱砷率最高达67%,铁水含砷量仅为0.007%.     

基于转炉热平衡的石灰石CaO理论替代比研究

通过转炉热平衡计算,建立了转炉富余热量与铁水成分和温度、废钢加入量和转炉出钢温度等工艺参数之间关系式;定义了转炉用石灰石代替活性石灰炼钢的CaO理论替代比η,并建立了石灰石CaO理论替代比与转炉富余热量之间的函数关系。研究表明:1)提高入炉铁水温度和铁水含碳量可显著提高转炉石灰石CaO理论替代比;2)铁水中的硅含量对石灰石CaO理论替代比的影响与铁水入炉温度有关,当入炉铁水温度低于1 300℃时,提高铁水硅含量能使石灰石CaO理论替代比增加;当入炉铁水温度高于1 300℃时,石灰石CaO理论替代比随铁水硅含量的增加反而下降;3)在转炉终渣碱度和出钢温度一定时,减少废钢加入量可以大幅度提高转炉用石灰石代替活性石灰炼钢的CaO理论替代比。     

圆台状铁水样品中Si、Mn、P分布的研究

讨论了Si,Mn,P三元素在圆台状铁水试样中的分布情况，对目前工艺铁水取样的代表性提出质疑，寻求炼钢入炉铁水的最佳取样方法。     

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.     

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)