宝钢不锈带钢酸洗工艺及废水处理

以宝钢为例,对不同材质的热、冷轧不锈钢带钢提出酸洗工艺流程和设计参数,概述不锈钢各种酸洗方法的酸洗机理,介绍不锈钢酸洗后的废水处理方法。     

无硝酸酸洗工艺在不锈钢冷轧生产中的应用研究

介绍了不锈钢酸洗工艺及污染防治措施,针对不锈钢冷轧酸洗是否采用无硝酸酸洗工艺,从其技术可行性、经济合理性进行了分析,以便为下一步不锈钢企业在酸洗工艺变革中提供建议与参考。     

不锈钢酸洗废液的回收和处理技术

用硝酸和氢氟酸作为钢材酸洗介质,会产生相当多的酸洗废液,废液如果直接排放会严重污染环境,而且浪费资源.介绍了不锈钢酸洗废液的产生机理以及各类酸的再生工艺,并对近年来国内酸洗废液资源化利用及处理技术的研究成果作了分析.根据不锈钢酸洗行业的特点,指出开发具有资源化与无害化酸洗废液处理新技术是必要的,同时也介绍了适合不锈钢生产厂应用的酸再生和废水处理工艺组合.     

不锈钢冷带酸洗工艺和设备配置

在冷轧不锈钢的生产中,带钢的酸洗是其中至关重要的一道工序,酸洗效果的好坏直接影响着带钢表面的质量。本文结合某大型冷轧不锈钢生产厂的实际情况和目前世界上先进的酸洗生产工艺,对国内不锈钢冷带的酸洗工艺和设备进行分析和论述。     

不锈钢酸洗废水处理技术分析

介绍了不锈钢酸洗废水的来源、组成、危害及其传统石灰中和的处理方法,通过传统方法处理不锈钢酸洗废水后得到的污泥的处理技术主要有无害化处理、稳定化和资源化三个层次。无害化处理是含铬固体废弃物处理的基本要求,固化、稳定化技术是处理重金属固体废弃物和其它非重金属危险废弃物的重要手段之一,对资源化方向国内外采用氨浸处理污泥的倾向比较大。分析了不锈钢酸洗废水处理技术的研究现状,主要包括化学法、物理化学法和生物化学法,并对不锈钢酸洗废水的治理进行了展望。指出了将不锈钢酸洗废液作为资源,将综合利用与环境治理结合才是最佳的解决途径。     

奥氏体不锈钢中厚板连续喷淋酸洗工艺浅析

论述了奥氏体不锈钢中厚板连续喷淋酸洗工艺的技术特征,并对典型的卧式、立式连续喷淋酸洗机组设备组成和生产工艺加以分析和对比。介绍了连续喷淋酸洗技术在国内不锈钢中厚板生产厂的实际应用情况。     

浅析奥氏体不锈钢中厚板生产中的连续喷淋酸洗工艺

本文在简要介绍奥氏体不锈钢酸洗钝化机理的基础上,重点论述了连续喷淋酸洗工艺的技术特征,并对典型的卧式、立式连续喷淋酸洗机组设备组成和生产工艺进行了分析和对比。最后,对连续喷淋酸洗技术其在国内不锈钢中厚板生产厂的实际应用情况进行了简单回顾。     

不锈钢盘条酸洗试验研究

随着太钢不锈钢高线的开发，不锈钢盘条的酸洗成了制约高线开发的重要环节．为了摸索出一套行之有效的酸洗工艺、方法，进行了一系列酸洗试验，本文通过大量试验分析了不同酸洗方法对不同钢种的影响，并提出了适用于生产实践的酸洗方法。     

不锈钢盘条酸洗工艺研究

随着太钢不锈钢高线的开发，不锈钢盘条的酸洗成了制约高线开发的重要环节，为了摸索出一套行之有效的酸洗工艺、方法，进行了一系列酸洗试验，通过大量实际试验分析了不同酸洗方法对不同钢种的影响。并提出了适用于生产实践的酸洗方法。     

不锈钢酸洗污泥对铁矿粉烧结液相生成的影响

为了有效利用不锈钢生产过程产生的大量不锈钢酸洗污泥,本文采用Factsage热力学软件计算不锈钢酸洗污泥对铁矿粉烧结液相生成特性和CaO-SiO_2-Fe_2O_3-Al_2O_3-MgO-CaF_2体系液相分布的影响,并选用熔点熔速测定仪研究了不锈钢酸洗污泥对铁矿粉液相生成能力的影响规律,建立了液相流动性与不锈钢酸洗污泥液配加比例之间的数学模型,揭示了液相生成量的变化特征。结果表明,实验结果与FactSage计算值基本一致,不锈钢酸洗污泥配加比例小于10%能够有效改善铁矿粉液相生成特征温度,而对铁矿粉液相生成量的影响较小,液相流动性指数与不锈钢酸洗污泥配加比例关系为:y=18. 40305-0. 09139x-0. 02644x~2+9. 07734x~3。     

Within-child associations between family income and externalizing and internalizing problems.

Within-child associations between family income and child externalizing and internalizing problems were examined using longitudinal data from the NICHD Study of Early Child Care and Youth Development (2004a, 2004b; N = 1,132). Variations in income effects were estimated as a function of whether families were poor, whether mothers were partnered, and the number of hours mothers and their partners were employed. On average, children had fewer externalizing problems during times when their families' incomes were relatively high than during times when their families' incomes were relatively low; the estimated benefits of increased income were greatest for children who were chronically poor. For both externalizing and internalizing problems, income was most strongly associated with problems when chronically poor children's mothers were partnered and employed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

FeCuNbSiB粘结磁体的制备及磁性能研究

通过2种途径将熔体快淬法制得的FeCuNbSiB非晶薄带制成环状粘结磁体。一是将非晶薄带进行晶化处理,再将晶化后的薄带粉碎成不同粒度的粉末,然后与粘结剂相混合制成粘结磁体。二是将非晶薄带直接粉碎成不同粒度的粉末,再将此粉末进行晶化处理,将晶化后的磁粉与粘结剂相混合制成粘结磁体。分析了磁粉粒度和模压压力对粘结磁体性能的影响。并对两种粘结磁体的性能进行比较。结果表明,第一种方法制备的粘结磁体的性能优于第二种。     

电流变流体和磁流变流体在工程上的应用

阐述了ER和MR流体的组成及发展过程，并对它们的物理和化学性能进行了对比分析，总结了现有ER和MR流体的理论计算模型、应用领域和应用状况，提出了ER和MR流体阻尼装置的分类方法及使用时应注意的几个问题，最后对ER和MR流体现存的问题和发展方向作了分析和展望。     

微波消化技术在铁矿石分析中的应用研究

通过微波高压密封法对沉积物样品的消解,采用正交试验设计法系统地研究了微波消解中如试剂种类、压力控制和消解程序等影响因素,确定了最佳消解条件。用微波高压密封法对不同矿源和形态的铁矿石样品进行消解,方法快速、简单,测定结果准确度高,相对标准偏差小于0.15%。本法亦可用于其他矿石样品和环境样品的消解。     

Seismic Response of Interior RC Beam-Column Joints Upgraded with FRP Sheets. I: Experimental Study

In this paper, efficiency and effectiveness of carbon fiber-reinforced polymers (CFRP) in upgrading the shear strength and ductility of seismically deficient beam-column joints have been studied. For this purpose, four reinforced concrete interior beam-column sub-assemblages were constructed with nonoptimal design parameters (inadequate joint shear strength with no transverse reinforcement) representing preseismic code design construction practice of joints and encompassing the vast majority of existing beam-column connections. Out of these four, two specimens were used as baseline specimens (control specimens) and the other two were strengthened with CFRP sheets under two different schemes (strengthened specimens). In the first scheme, CFRP sheets were epoxy bonded to the joint, beams, and part of the column regions. In the second scheme, however, sheets were epoxy bonded to the joint region only but they were effectively prevented against any possible debonding through mechanical anchorages. All four subassemblages were subjected to cyclic lateral load histories so as to provide the equivalent of severe earthquake damage. Further, the damaged control specimens were repaired after filling the cracks through epoxy and wrapping them with CFRP sheets under the same two above-mentioned schemes. These repaired specimens were subjected to the similar cyclic lateral load history and their response histories were obtained. Hence, a total of six specimens were tested: two control; two strengthened; and two repaired. Response histories of control, repaired, and strengthened specimens were then compared. The results were compared through hysteretic loops, load-displacement envelopes, column profiles (maximum horizontal displacements of column along its height), joint shear distortion, ductility, and stiffness degradation. The comparison shows that CFRP sheets improve the shear resistance of the joint and increase its ductility. Results of two chosen schemes of strengthening were also compared and the importance of beam upgrading was highlighted.     

Time estimation in process-reactive schizophrenia.

Process and reactive schizophrenics, and reactive schizophrenics and normals were compared as to their responses on a perceptual time-estimation task. Null hypotheses being tested were that groups would not differ in variability or accuracy of response. Schizophrenic (45) and normal (15) subjects were selected from the male patient population and hospital employees, respectively, of a Veteran's Administration hospital. Schizophrenics selected for the study were classified by means of the Abbreviated Becker Elgin Scale. Subjects were individually administered a time-estimation task consisting of seven stimulus cards which were tachistoscopically presented, with exposure speeds at 10, 20, and 30 seconds for each card. Judgments of exposure times were converted into scores based upon ratios of estimated time to actual time. Scores (three) for each card were totaled. Groups were then compared on each of the stimulus cards by means of two-tailed t tests. In accuracy of estimation, process schizophrenics demonstrated significantly less accuracy than did reactives on four of the seven cards; no differences were shown between reactives and normals in accuracy of estimation. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

X射线荧光光谱技术在铁矿石分析中的应用文献评介

系统汇集了20世纪70年代以来我国使用X射线荧光光谱(XRF)分析技术进行铁矿石分析的文献共计101篇,其中熔融制样法文献78篇,粉末压片法文献11篇,能量色散仪器分析及野外现场应用文献12篇。首先介绍了铁矿石分析的基础条件:包括专著、标准物质、标准方法和综合性评述论文;然后采用表格方式对文献要点进行了介绍, 按熔融法、粉末压片法、能量色散多元素分析方法进行了重点评介;最后讨论了铁矿石分析中常遇到的粒度、矿物效应,制样方法选择和内标的应用等实际问题。对XRF在铁矿石分析中的某些重要问题进行了探讨,并对XRF分析铁矿石的应用前景作了展望。文献表明:XRF技术已经成为铁矿石主、次量元素分析最重要的分析方法之一。全篇引文151篇。     

Some clinical correlates of operant behavior.

"22 chronic psychotic patients, Ss in an operant conditioning study, were given psychological tests and rated as to their ward behavior. Ratings of ward behavior and rates of operant response were directly related. Those patients who were testable by at least one clinical test were those who were high operant responders. These findings were discussed in terms of a notion of adaptability to the demands of the hospital environment. Clinical and operant data on 6 normal Ss were also presented." (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Identification in group therapy.

"The Ss of this study were male and female adolescents (12-15 years of age) who were asked to volunteer to participate in groups that 'would discuss adolescent problems.' Those who volunteered were rated by their teachers on emotional adjustment. Ss rated as most poorly adjusted were eliminated from the study. Three therapy groups were organized, each composed of five boys and five girls, each in the charge of a different therapist. The members of the group were given a special questionnaire, designed to assess needs, and a group form of the Rorschach before therapy began. At the conclusion of therapy, all Ss again took the questionnaire… . The hypotheses that both rigidity and lability were inversely related to identification were tested by correlational methods. Results were positive in both instances." From Psyc Abstracts 36:01:1IG95B. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Reliability of Settlement Prediction—Case History

A geotextile-reinforced embankment was built over soft ground. Staged construction and vertical prefabricated drains were used to obtain strength gain via consolidation of the foundation material. Settlement and pore pressure were measured as a part of construction control. Settlement, differential settlement, and rate of consolidation were predicted by simple models. Uncertainties in the predictions were evaluated to assess the reliability of the predictions. The estimated errors were compared with the measured values, and major contributors to prediction errors were identified.