转炉尘泥炼钢造渣冷却剂试件及应用研究

介绍了转炉炼钢尘泥成型工艺的试验研究，分析了尘泥冷却剂在210t转炉炼钢中的应用试验情况，指出该冷却剂作为转炉炼钢造渣冷却剂可以替代进口铁矿石，社会效益和经济效益显著。     

轮窑工艺生产转炉尘泥烧结矿及炼钢应用的试验研究

该项目利用转炉炼钢尘泥的塑性,开发研究了尘泥的成型、轮窑烧结工艺。在２１０ｔ转炉上进行了尘泥烧结矿替代铁矿石的造渣冶炼试验。结果表明该项目的工艺可行、社会经济效益显著。     

转炉尘泥制冷固球团可降成本

北京科技大学钢渣变性综合利用课题组应用转炉尘泥、铁鳞等研制的改善转炉炼钢过程、降低炼钢成本的冷固球团,可使每吨钢降低生产成本３０～４０元,经济效益十分显著。炼钢尘泥不仅污染环境,而且浪费了大量资源。北科大综合利用课题组利用转炉尘泥、铁鳞等加入粘结剂,成功地研制出改善转炉钢过程的冷固球团。该球团在宣钢炼钢厂转炉上进行应用,使生产大为改善,产量增加,经济效益显著．经反复试验,使用该球团可缩短冶炼时间１分多钟;降低了中期渣粘度,减少了喷溅,同时取代了铁矿石,还降低铁耗１０ｋｇ／ｔ,石灰用量也减少了１６…     

转炉尘泥综合利用技术现状与应用前景

转炉尘泥是转炉炼钢过程中产生的副产物,具有含铁高、含钙高、含水高,粒度细、黏度大、活性高、杂物多等特点,是宝贵的二次资源,如不进行回收利用,不仅浪费了矿物资源,同时也会占用大量土地面积、污染环境。对转炉尘泥物性、转炉尘泥在综合利用过程中存在的优缺点,以及转炉尘泥制球工艺等进行了综述。分析了转炉尘泥回收用作造渣剂的优势,认为将转炉尘泥经加入黏结剂、混匀搅拌、加压成型等工艺成球应用于转炉作造渣剂,既可以简化炉前操作,降低炼钢成本,又能够提高资源的综合利用效率,减少环境污染,对强化转炉尘泥资源综合利用具有重要意义。     

喷吹CO2作为冷却剂的转炉炼钢工艺探索

转炉炼钢中期进入碳的剧烈氧化期而使炉温迅速升高,此时需要加入适量冷却剂抑制炉温过高。可以通过双流道氧枪实现用CO2气体作为冷却剂,替代铁矿石、氧化铁皮等固体冷却剂。理论分析可知,CO2作为冷却剂具有与铁矿石相当的冷却效果,同时可以更好地控制转炉钢水温度及成分,简化转炉炼钢设备及工艺。另外,用CO2作为冷却剂其化学反应产物为CO,可以提高转炉煤气的品位,降低整个转炉炼钢工艺的综合能耗。     

炼钢尘泥在转炉上的应用

转炉炼钢尘泥作为冷却剂和造渣剂用于25 t氧气顶吹转炉冶炼,不仅改善了熔池的冷却效果,节约了石灰,还加快了成渣速度,增加了渣中w(FeO),从而提高了脱磷效率.     

转炉尘泥综合利用实验研究及应用

采用压团中温固结的新方法将转炉尘泥制作成团块状化渣剂用于转炉冶炼生产，对转炉尘泥的处理与综合利用具有重要意义。研究中首先进行了多种尘泥球团制作方法的对比实验，从中寻求了一种最适宜的球团工艺，然后通过系统实验确定了最佳工艺参数；在实验的基础上，通过自主设计建成了新的转炉尘泥化渣剂球团生产线；最后在生产中，调整工艺参数以提高尘泥球团的强度，满足炼钢生产要求；并在炼钢生产中得出了适宜的尘泥球团的添加及应用技术，使尘泥球团最终在安钢炼钢过程中得到了非常成功的应用。     

宝钢转炉尘泥冷固球团生产及返回转炉应用

冷固结工艺是一种简单可靠、适应性广的球团生产工艺.宝钢转炉尘泥具有粒度细、含铁量高的特点,是宝贵的二次资源.对宝钢转炉尘泥进行了原料分析,通过配料和工艺设计及检测分析,成功开发出符合使用要求的宝钢转炉尘泥冷固球团.经宝钢炼钢厂现场使用证明宝钢转炉尘泥冷固球团可以替代原有除尘灰热压球团和部分铁矿石等,具有较好的冷却和化渣效果.分析表明采用冷固结工艺替代原有热压工艺生产冷固球团返回转炉应用是宝钢转炉尘泥资源有效的利用途径.     

含铁尘泥利用途径的探讨

本文对鞍钢尘泥球团矿的试验和生产进行分析评价,提出初步看法:1.平炉粉尘用于球团矿配料,技术合理可行,经济效益显著;2.改变目前转炉泥用于烧结矿配料的途径,应采用和推广昆钢污泥处理工艺(做造渣剂返回转炉),解决转炉泥的利用问题;3.研究探讨瓦斯泥的利用。综上所述,尘泥的合理利用是搞好环保,降低钢铁成本的重要途径。     

炼钢转炉尘泥综合利用实验研究及工业应用

采用压团中温固结的方法将转炉尘泥制作成团块状化渣剂用于转炉冶炼生产的新思路,对转炉尘泥的处理与综合利用具有重要意义。研究中首先进行了多种尘泥球团制作方法的对比实验,从中寻求出了一种最适宜的球团工艺,然后通过系统实验确定出了最佳的工艺参数;在实验的基础上,通过自主设计建成了新的转炉尘泥化渣剂球团生产线;最后在生产中,调整工艺参数以提高尘泥球团的强度,满足炼钢生产要求;并在炼钢生产中得出了适宜的尘泥球团的添加及应用技术使尘泥球团最终在炼钢过程中得到了成功的应用。     

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。