铝电解过程氟化铝添加量和出铝量的模糊决策

氟化铝添加量、出铝量是影响铝电解技术经济指标的最重要因素之一.作者采用模糊控制方法,根据铝电解槽运行状态调整每日氟化铝添加量、出铝量,实现预焙铝电解槽温度的控制.该系统包括参数预处理、专家知识库、数据的模糊化、模糊逻辑决策、模糊规则自适应等模块.系统在我国某厂300 kA铝电解槽上运行表明,电解温度稳定在945～955℃,电流效率达94.5%,吨铝直流电耗13 000 kW·h.     

300 kA新型阴极铝电解槽的成功实践

2009年7月,东方希望包头稀土铝业引用东北大学冯乃祥教授的新型阴极结构电解槽技术,在300 kA的电解槽系列上进行工业化试验.目前电解槽的槽电压为3.71 V,电解槽的电流效率按97%整流效率计算为91%,平均直流电耗为12 160kW·h/t-Al,本文介绍了300 kA新型阴极结构电解槽的焙烧启动和后期管理的过程与经验.     

300kA新型阴极铝电解槽的成功实践

2009年7月,东方希望包头稀土铝业引用东北大学冯乃祥教授的新型阴极结构电解槽技术,在300 kA的电解槽系列上进行工业化试验.目前电解槽的槽电压为3.71 V,电解槽的电流效率按97%整流效率计算为91%,平均直流电耗为12 160 kW.h/t-Al,本文介绍了300 kA新型阴极结构电解槽的焙烧启动和后期管理的过程与经验.     

统计过程控制在铝电解生产中的应用研究

为了减小铝电解生产中测量系统的误差,发现其过程参数发生的异常,将统计过程控制引入到铝电解生产中,实现了一个面向铝电解生产的统计过程控制系统。依据测量数据找出生产过程的异常数据,提出改进方法,并对改进的测量系统进行检验。该系统在东方希望包头稀土铝业有限责任公司实际应用表明,统计过程控制系统能有效地帮助铝电解工艺人员发现异常数据,纠正生产过程的测量系统误差,保持工艺参数的稳定,降低能耗。     

广义动态模糊神经网络在铝电解预测中的研究与仿真

铝电解过程中,每日出铝量、氟化铝添加量的决策对铝电解过程温度和过热度的准确控制非常重要,是影响铝电解技术经济指标的重要因素之一。本文基于广义动态模糊神经网络算法(GD-FNN),构造了铝电解预测系统,在给定铝电解槽所需温度之后,对铝电解中的出铝量和氟化铝添加量进行预测。此算法通过对高电流效率、低能耗的电解槽的运行规律进行自适应分析,训练出对应的决策规则,运用到效率低的电解槽,可以实现铝电解槽温度和过热度控制,提高铝电解电流效率。通过对某铝电解厂实际数据进行仿真实验,证明了该算法在铝电解控制中的有效性。     

新型阴极结构电解槽铝电解试验

针对传统铝电解槽极距已经达到低限,槽电压不能大幅度降低的关键技术难题,提出一种新型阴极结构铝电解槽.介绍了这种新型阴极结构电解槽的特点和工艺技术特征,以及在重庆天泰铝业公司168 kA电解槽上进行工业电解槽试验的结果.统计期内3台试验电解槽平均槽电压为3.803 V,平均直流电耗比同系列其他127台传统电解槽低1 250 kW · h/t Al,达到1 2101 kW · h/t Al.     

云铝开发出新型曲面阴极结构铝电解槽及相关配套技术

云南冶金集团股份有限公司、云南铝业股份有限公司通过与中南大学的进一步合作，在当前铝电解行业的主流槽型300kA大型预焙铝电解槽上研究开发出新型曲面阴极结构铝电解槽及相关配套技术，进行产业化应用。     

科研成果鉴定获奖组讯

“电解槽集中大修转运系统设备研发与应用”项目科技成果通过鉴定2009年8月28日，由沈阳铝镁设计研究院、东方希望包头稀土铝业有限责任公司和株洲天桥起重机股份有限公司共同完成的“电解槽集中大修转运系统设备研发与应用”项目通过了中国有色金属工业协会的科技成果鉴定会。认为该项目在消化引进国外电解槽集中大修成套设备的基础上，创新开发成功了我国首套电解槽集中大修系统的技术和装备，并应用于生产，填补了国内空白；     

异型阴极在350kA铝电解槽上的应用

通过对异型阴极在350 kA铝电解槽系列的应用,实现了电解槽低电压高电流效率的工艺控制,使吨铝直流电耗降至12 544 kW· h/t-Al.     

宁夏能源铝业400 kA铝电解系列成为中电投金牌电解系列

正近期,宁夏能源铝业400 kA电解系列凭借吨铝铝液氧化铝单耗、氟化盐单耗、阳极毛耗、电解铝综合交流电耗等指标均优于中电投集团公司铝板块对标值,被确认为金牌电解系列。宁夏能源铝业400 kA铝电解系列由沈阳铝镁设计研究院设计,于2011年10月30日全部投产。从焙烧启动到生产运行,该公司探索出了适合新型阴极钢棒结构电解槽的工艺控制思路和技术。焙烧启动是保障电解槽能否高效运行的基础。     

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)     

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.