含锌铅钢铁厂粉尘处理技术现状和发展趋势分析

概述了国内外含锌铅钢铁厂粉尘的产出和处理技术发展现状，总结了各种处理技术特点，并根据我国含锌铅钢铁厂粉尘成分，对我国粉尘处理技术今后的发展方向进行了分析。     

钢铁厂含锌粉尘综合利用现状及展望

介绍了国内外钢铁厂含锌粉尘的产出量与组成,以及国内外从钢铁厂含锌烟尘中回收锌的研究工艺现状及存在的问题,提出按照含锌物相不同进行分类处理钢铁厂含锌粉尘,认为钙化焙烧矿相重构-氨浸法回收锌的方法可以作为处理钢铁厂含锌粉尘的新工艺思路。     

直底炉还原钢厂含锌粉尘资源化技术

本文介绍了直底炉还原钢厂含锌粉尘资源化技术的主要内容,揭示了该技术投资少,成本低,操作简便,可靠性强,可实现内部循环,无二次污染的特点。与现有国内外含锌尘泥资源化处理技术相比,综合优势明显。对当下国内钢铁厂面临的环境与生存发展问题的解决有较强的适应性,具有良好的应用前景,展示了钢铁厂含锌尘泥资源化技术的一条新路。     

我国转底炉处理钢铁厂含锌粉尘技术研究

介绍了我国转底炉处理钢铁厂含锌粉尘技术,结合降低高炉锌负荷的几种方法以及转底炉和其它几种直接还原技术的比较,分析了转底炉直接还原技术处理钢铁厂含锌粉尘的优缺点,对转底炉技术提出了几点思考意见,以期为我国转底炉技术应用提供一点借鉴和参考。     

转底炉处理含锌铁尘泥工艺分析

分析了钢铁厂粉尘的处理现状,对比了含锌尘泥处理工艺优缺点,提出转底炉工艺是处理含锌粉尘的最佳选择。     

钢铁厂含锌粉尘综合利用及相关处理工艺比较

对国内外钢铁企业处理含锌粉尘的不同工艺方法进行了阐述。通过分析火法处理工艺中的回转窑、转底炉和流化床处理工艺,认为利用转底炉直接还原工艺处理钢铁厂含锌粉尘具有使用原料和能源的灵活性大,基建投资和处理成本较低,设备运行稳定以及环保措施得力,值得推广和应用。     

钢铁厂含锌固废资源循环利用研究现状及发展态势

钢铁厂生产的高炉灰、电炉炼钢粉尘等含锌固废污染严重,治理难度大.本文在介绍我国钢铁厂含锌灰产出及其主要成分的基础上,回顾了目前的含锌固废资源利用技术,并详细分析火法还原中的回转窑工艺和转底炉工艺及湿法工艺的原理、工艺流程、存在问题,从原料组成、主要设备设施、产品情况,以及投资和环保治理方面进行工艺对比分析,对今后含锌固...     

钢铁厂含锌铅粉尘中锌铅分离的半工业试验

在实验室实验成功的基础上,采用铝浴熔融还原法对钢铁厂含锌铅粉尘中锌铅分离进行了半工业性试验研究,试验结果表明:铝浴法处理含锌铅粉尘可一次性直接得到较高品位的氧化锌粉,并对该工艺进行了经济效益分析。     

钢铁厂含锌尘泥处理直接还原转底炉的设计与应用

根据钢铁厂含锌粉尘出料直接还原转底炉的工艺特点,详述了设计条件、设计参数选取、粉尘直接还原配料方案的物料平衡计算、转底炉生产工艺描述、基于物料平衡的热平衡计算以及炉型、特殊设备和自动控制等系统的设计过程,使转底炉关键设备实现了完全国产化。通过沙钢转底炉设计和应用实践证明,转底炉是一种适用于钢铁厂含锌固废和粉尘处理的高效、低能耗、低污染设备,可以进行推广应用。     

回转窑处理钢铁厂含锌粉尘的工艺设计与实践

钢铁工业每年都会产生大量固体废弃物,包括冶炼过程中产生的上千万吨含锌粉尘,若处置不合理,不仅会给社会和环境带来严重负担,还会造成资源的浪费.本文首先对钢铁厂粉尘中铁、碳及有害元素锌含量进行了成分分析,在此基础上,对现有回转窑处理含锌粉尘工艺流程及特点进行了介绍,并针对工艺现有缺点进行了设计优化.通过优化设计,解决了除尘...     

Voices of fear and anxiety and sadness and depression: The effects of speech rate and loudness on fear and anxiety and sadness and depression.

Two studies investigated the role of expressive vocal behavior (specifically, speech rate and loudness) in fear and anxiety and in sadness and depression. In the 1st study, participants spoke about personally experienced fear and anxiety-arousing and neutral events using 3 different voice styles: fast and loud, normal, and slow and soft. In the 2nd study, participants spoke about personally experienced sad or depressing and neutral events using the same 3 voice styles. In both studies, the participants' highest levels of subjective affective and cardiovascular (CV) arousal occurred when they spoke about the emotional events in a mood-congruent voice style: fast and loud in the case of fear and anxiety, and slow and soft in the case of sadness or depression. Mood-incongruent voice styles canceled the heightened levels of CV arousal normally associated with these negative emotions. The voice-style manipulation had no significant effect on the participants' levels of CV arousal during the neutral discussions. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Synthesis and analysis of mixed chlorinated-fluorinated dibenzo-p-dioxins and dibenzofurans and assessment of formation and occurrence of the fluorinated and chlorinated-fluorinated dibenzo-p-dioxins and dibenzofurans

Despite the use of multimodal therapy, higher-grade glioma is still uniformly fatal in the adult population. There is a considerable difference between the length of survival in each given patient, even within the same tumor type and malignancy grade group, suggesting that there are factors that might differentially influence outcome. To identify such factors, 107 patients with anaplastic or malignant glioma were retrospectively investigated. Clinical parameters and paraclinical data on the p53, mdm2, and EGFR genes at the DNA or protein level were evaluated by univariate analysis and Cox proportional hazards regression modeling. Kaplan-Meier survival estimation demonstrated that immunohistochemical positivity for mdm2 protein in patients with anaplastic astrocytoma or with glioblastoma multiforme was associated with a shorter survival time (p = 0.02). P53 gene mutations and immunopositivity for the epidermal growth factor receptor (EGFR) protein were not significantly related to poor prognosis. The Cox proportional hazards model revealed immunohistochemical positivity for p53, mdm2, or for both of them, the presence of postoperative irradiation, and the extent of surgical resection of tumor to be variables significantly associated with prolonged survival. EGFR overexpression, age over 60 years, and Karnofsky performance score below 40 points did not significantly shorten survival time. In conclusion, the present study identified immunohistochemically detected mdm2-protein overexpression as a statistically significant negative prognostic parameter in patients bearing anaplastic or malignant glioma. Association analysis of variables revealed a possible correlation between mdm2 and p53, which is also consistent with the biological interaction mode of both proteins in vivo.     

Sexuality and aging--usual and successful

BACKGROUND: As aging research increasingly reflects an effort to dissociate true time-driven changes from those that can be improved, sexuality in later life remains largely unexplored. Several problems are evident. There is a lack of normative data, a lack of a conceptual framework relating to the biology, psychology, and sociology of sex, and an attitudinal resistance that obscures the entire topic. METHODS: We conducted a three-part instructional series on major topics involved with sexuality and aging. We surveyed our group of attendees (n 158, average age 68 for males, 65 for females) before and after the series. RESULTS: A remarkably robust sex life was evidenced by both the men and the women, even until advanced old age. Yet, a substantially decreased involvement was reported from 10 years earlier. Despite current activities, people of both sexes wished they were participating even more than they currently were. Impotency was identified as the major negative feature for the men; relationship problems were for the women. A questionnaire 6 months after the series reported improved sexual attitudes, but no change in sexual activities from the earlier survey. CONCLUSION: Sexuality is a major quality-of-life issue which persists into old age. Our study showed that the usual sexual practices reported by our group were not considered by them to be ideal. The intervention of this instructional series provided improved sexual attitudes but not performance. Additional studies are encouraged.     

Spondylolysis and spondylolisthesis and sports

Spondylolysis and spondylolisthesis occur predominantly in the lower lumbar spine. Besides congenital defects such as predisposition of spondylolysis the correlation between competitive sports activities and an increased incidence of spondylolysis is proved. In early stages, complete healing can be achieved by conservative treatment (abstinence from sports activities for 3 months, orthesis). Persistence of pain, neurologic symptoms and progression of vertebral slipping are indications for operative treatment (reconstruction of the isthmus, dorso-ventral spondylodesis). The exercise tolerance depends on the extent of instability, progression of vertebral slipping and clinical symptoms. The limits of exercise tolerance vary among the individual athletes and require the decision of the physician. Backstroke swimming, abdominal and back muscle strengthening exercises, and types of sport involving smooth movements are advisable. Sports education in school is possible without restriction in patients with stable spondylolysis and in those with spondylolisthesis without unfavourable concomitant factors.     

Larks and owls and health, wealth, and wisdom

OBJECTIVE: To test the validity of Benjamin Franklin's maxim "early to bed and early to rise makes a man healthy, wealthy, and wise." DESIGN: Cross sectional analysis of sleeping patterns in a nationally representative group of elderly people, and longitudinal investigation of mortality. SETTING: Eight areas in Britain (five in England, two in Scotland, and one in Wales). SUBJECTS: 1229 men and women aged 65 and over who in 1973-4 had taken part in a survey funded by the Department of Health and Social Security and for whom data on sleeping patterns, health, socioeconomic circumstances, and cognitive function had been recorded. MAIN OUTCOME MEASURES: Self reported income, access to a car, standard of accommodation, performance on a test of cognitive function, state of health and mortality during 23 years of follow up. RESULTS: 356 people (29%) were defined as larks (to bed before 11 pm and up before 8 am) and 318 (26%) were defined as owls (to bed at or after 11 pm and up at or after 8 am). There was no indication that larks were richer than those with other sleeping patterns. On the contrary, owls had the largest mean income and were more likely to have access to a car. There was also no evidence that larks were superior to those with other sleeping patterns with regard to their cognitive performance or their state of health. Both larks and owls had a slightly reduced risk of death compared with the rest of the study sample, but this was accounted for by the fact that they spent less time in bed at night. In the study sample as a whole, longer periods of time in bed were associated with increased mortality. After adjustment for age, sex, the presence of illness, and other risk factors, people who spent 12 or more hours in bed had a relative risk of death of 1.7 (1.2 to 2.5) compared with those who were in bed for 9 hours. The lowest risk occurred in people who spent 8 hours in bed (adjusted relative risk 0.8; 0.7 to 1.0). CONCLUSION: These findings do not support Franklin's claim. A "late to bed and late to rise" lifestyle does not seem to lead to socioeconomic, cognitive, or health disadvantage, but a longer time spent in bed may be associated with increased mortality.     

深云立交桥梁检测及加固改造

根据深云立交桥梁的检测结果，对该桥目前的整体状况、工作状态，及其使用情况做出综合评价，对桥的病害原因进行了分析，并提出合理的加固方案。     

关于摩尔浓度及其与硬度转换关系问题的讨论

众所周知，国际单位制物质的量采用摩尔(mol)表示，近几年出版的给排水专业书籍，为了与国际单位制接轨，逐渐将摩尔的使用频率不断提高，被给排水技术人员广泛应用的新版给排水设计手册，将表示物质浓度的单位“当量／升”或“毫克当量／升”．改为mol／l或mmol／l，虽然编者对其基本单元定义作了说明，但在实际运用上仍会出现误解，     

《儿子与情人》的语码转换与男女二元对立

劳伦斯小说《儿子与情人》一个鲜明的语言特色就是标准英语和当地方言频繁的语码转换。莫瑞尔用方言来对抗妻子,而妻子坚持用标准英语,偶尔也用方言来讽刺、挖苦丈夫。语码转换反映了劳伦斯男女二元对立的哲学思想。     

抗腐蚀高强耐磨涂料研发与应用

介绍了抗腐蚀高强度耐磨涂料的研制和开发，以及用作柳钢球团回转烘干机刮板保护涂层的应用效果。