钢铁工业产品水足迹研究

水足迹是基于消费基础的水资源利用情况的指示器。工业水足迹分析可定量反映工业生产对水资源系统产生的压力程度,为工业水资源可持续规划与管理提供新的思路和研究方向。通过对钢铁生产过程中虚拟水、水足迹的计算与分析,能够对钢铁行业水资源的现状进行分析,提出在生产中合理利用水资源的建议,促进钢铁行业的绿色发展和可持续发展。     

玉米交联淀粉的制备研究

[目的]探讨甲醛用量、pH值、反应温度、反应时间对玉米交联淀粉交联度(即沉降积)的影响.[方法]以玉米淀粉为原料,甲醛为交联剂,制备玉米交联淀粉.[结果]确定最佳工艺条件为:甲醛与淀粉的质量比为0.020、反应时间为1 h、反应pH值为9.0、反应温度为42.5 ℃,所制备的交联淀粉沉降积为2.7 ml.[结论]该试验筛选出了制备玉米交联淀粉的最佳工艺条件,该法具有工艺简单、快速、高效等特点.     

玉米湿法实验室浸泡工艺的浸泡效果分析

[目的]确定实验室玉米淀粉生产的最适宜条件,并对浸泡效果进行分析.[方法]应用正交试验确定适宜的工艺条件,通过光学显微镜和扫描电子显微镜对浸泡效果进行分析.[结果]适宜的浸泡条件为:浸泡时间48 h,浸泡温度55℃,SO2,浓度0.2%.显微分析结果为:在适宜的浸泡条件下,蛋白质基质分解充分.浸泡效果的好坏与蛋白质基质的分解程度呈正相关.[结论]该研究可为实验室玉米淀粉的浸泡工艺研究提供基础.     

淀粉废水资源化工程改造技术

针对河北省某玉米淀粉生产企业产生的玉米浸泡废水,研究了采用离子交换法从玉米浸泡水中提取菲叮,使玉米浸泡水回用率达到100%。在原污水处理工艺基础上增加絮凝沉淀和气浮工序,可大大减少污染物,使处理后污水水质达到《污水综合排放标准》(GB8978—1996)—级排放标准。     

提高彩板质量和降低水耗的预清洗工艺

武钢第一彩涂机组预处理工序,通过工艺设计改进、设备结构创新、废水资源整合等综合技术改造,达到节约水资源,降低生产能耗的目的.实践证明,根据本机组自身具体的生产能源消耗现状以及设备结构特点,通过技术创新,采用高压水射流新技术,完善设备功能,提高二次资源充分回收利用等方法,是节约能源的有效途径,是一个值得探讨的节能方向.     

钢铁生产的水能关系分析

从钢铁生产过程中水资源使用时的能耗角度研究了钢铁联合企业的水能关系,提出了水能强度的概念来评价企业生产过程中水资源利用的节能水平,建立了钢铁企业的水能关系模型。以中国某大型钢铁联合企业为例,计算并分析了该企业的水能关系。该企业总的水能量为55 709 kW·h/h,重复用水水能量占整个钢铁企业全部水能量的82%,补水水能量占16%,排水水能量占1%;各工序中热轧工序占比最大,其次是炼铁、炼钢工序,冷轧、烧结和炼焦工序较低。该企业的吨钢水能强度为0.208 kW·h/m3,炼铁工序的水能强度最高,热轧、炼钢工序次之,烧结、冷轧和炼焦工序较低。最后,从钢铁生产过程水资源利用的角度得到节能的方向及措施。     

不同种类淀粉对赤铁矿抑制效果的研究

通过浮选实验,研究了玉米淀粉,糯玉米淀粉,酸裂解玉米淀粉,1号淀粉,马铃薯淀粉,木薯淀粉在调军台铁矿浮选中的作用效果.研究结果表明各种淀粉对赤铁矿都有一定的抑制作用,各种淀粉的的分子量不相同,支链部分和直链部分的比例不同,是淀粉对赤铁矿抑制作用存在差别的主要原因.     

贵溪冶炼厂闪速炉用水的改造及生产实践

针对贵溪冶炼厂铜精矿熔炼工序工业用水,设备冷却水,区域废水收集等生产工艺过程用水控制的情况,对铜精矿熔炼生产过程用水工艺的优化改造情况进行了说明。对改造过程中遇到的技术难题进行了分析,达到的预期效果进行了总结。经过这些优化改造,水资源经处理后可进行循环利用。     

先秦时期水伦理思想研究现状述评

近些年来在我国水资源利用过程中,因利益驱动导致了严重的人水问题,并由此引发出人与人、人与社会等诸多矛盾.在社会发展中,这些问题是由经济、技术、社会等诸多问题引起的,针对这些问题,如果不能解决人们的价值观、利益观,那么想解决人水矛盾是不现实的,所以人们开始了水伦理研究.在此,将国内外有关学者研究先秦时期水伦理思想加以分析、综合,让我们来看看目前人们对水伦理思想研究现状的认识,同时为以后人们对水伦理思想的研究提供一些借鉴.     

韶钢焦化工艺能源利用模型开发与能流优化分析

介绍了焦化工艺能源利用模型开发情况与能流结构优化分析.为了能够全面掌握焦化生产过程能量利用的情况,通过建立数学模型与开发分析软件计算焦化生产的物料、能量和的平衡,尤其是通过通过平衡计算,了解工艺过程或设备中能量品味的变化过程,并从能量品味的变化过程角度,评价能量的利用价值,研究改善工艺过程或设备热量利用从而降低能耗的途径,分析工序的新的节能潜力与方向,并结合工艺装备实际,研究分析节能技术方案,为焦化工艺的节能改造提供依据.     

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.