1991年北美铁矿球团生产情况

1991年北美铁矿产量估计为93.1Mt高于1990年的90.9Mt,但低于1989年的98.2Mt。1991年北美12家球团厂估计产球团矿(包括酸性和熔剂性球团矿)75.7Mt,低于1990年15家球团厂产量的76.5Mt和1989年15家球团厂产量的82.5Mt,1991年北美球团产量估计占球团生产能力91.3Mt的83%。美国最大的球团厂明塔克厂1991年估计生产熔剂性球团矿     

ISO9001：2000标准在球团生产中的运用

武钢矿业公司随着鄂州500万t/a球团厂的建设和二期的规划，将有望成为球团矿的商品基地。大冶铁矿球团厂作为矿业公司最早的球团矿生产单位，在2003年实现了球团矿产品外销，从武钢内部市场走入外部市场。如何稳定和提高产品质量，满足用户的需要，更好地巩固和开拓市场，为今后武钢成为球团矿的商品基地积累经验将成为工作的重点。     

瓦斯科球团厂的生产简介

瓦斯科球团厂的生产简介智利太平洋钢铁公司的瓦斯科球团厂于１９７８年初建成投产。原设计生产能力为３．５Ｍｔ／ａ，因市场行情的影响，初期产量控制在３．１５Ｍｔ／ａ。目前，该厂的年生产能力为４．０Ｍｔ，其中自熔性球团矿３．４Ｍｔ，直接还原球团矿０．６Ｍｔ，...     

小资料统计

根据北美15家球团厂统计1990年球团矿产量将达到82.4Mt,相当于生产能力90.8Mt的90%,1990年产量低于1989年的82.5Mt,高于1988年的80.2Mt。     

加石灰熔剂球团矿质量的改进

目前神户钢铁公司巳拥有年产700万吨球团矿的生产能力。它于1966年建成第一座球团厂,用以处理细粒铁矿粉,供应神户3号高炉。随后在加古川钢铁厂又建成了2座球团厂。此后,他们一些较大型高炉使用加石灰熔剂球团矿的比例高达40%至70%。然     

鞍钢200万t氧化球团链篦机-回转窑系统的设计

本文介绍了鞍钢200万吨氧化球团厂链篦机-回转窑生产线的工艺设计及特点。详细论述了球团生产过程中的原料准备、煤粉制备、干燥、配料、混合、造球、焙烧、冷却、成品等各个环节。鞍钢弓矿公司球团厂生产出铁品位65．5％、二氧化硅含量5％左右的球团矿,其产品质量达到了世界一流球团矿的技术标准。     

北美铁矿球团生产现状

1990年北美预计生产铁矿原料(包括球团矿、烧结矿、部分精矿和天然块矿)97.4Mt,低于1989年的98.2Mt,超过1988年的95Mt。1981年北美22家球团厂共生产球团     

球团、烧结矿在中温(700—1100℃)还原下的膨胀——人造富矿冶金性能述评之二

从五十年代中期开始,酸性球团矿投入大规模工业生产,这主要是在美国;开采上湖区的铁燧岩贫矿所获得的铁精矿粒度很细,不宜于烧结,采用氧化焙烧球团工艺却很适合处理细精矿;球团在高炉冶炼的效果也很好,此外球团矿有良好的机械性能,特别适宜于氏期贮存、长途运输等优点;因此在六十年代中,世界各地陆续建立大型球团生产基地。随着选矿技术的进展和各地矿粉物理化学性质的不同,在实践中就暴露出新的技术问题。上湖区和北美许多球团厂的精矿都有一个共同的特点,这就是SiO_2相当高,     

不定形耐火材料在球团焙烧炉上的应用

鞍钢烧结总厂球团焙烧机是从澳大利亚克里斯夫公司罗布河球团厂部分引进设备,11号高炉技术改造重大配套项目之一。鞍山黑色金属矿山设计院加以修、配、改设计,设计生产能力为年产200万吨氧化镁酸性球团矿。1989年2月投产,迄今已两年多,其间历经两、三次检修部分炉衬,终因炉衬破损严重,不能适应鞍钢炼铁生产对球团矿日益增长的要求。公司决定对焙烧炉进行大修。大修设计由鞍钢设计院承担对原设计不尽合理部分进行修改。     

巴西多西河谷公司对其球团厂进行现代化改造

据报道 ,巴西多西河谷公司宣布将投资 2 330万美元对其运营的 7个铁矿石球团厂进行现代化改造。据某位业内人士称 ,自动化改造完成后将生产出质量更优的球团矿 ,且能使每吨球团矿的生产成本降低30美分。目前 7个球团厂的生产略高于其设计产能 2 50 0万 t/a,主要由于国际市场球团矿需求坚挺。 1 999年球团矿产量为 2 1 70万 t,所以目前多西河谷不能确认自动化改造完成后能否使其厂的生产率提高 ,目前 ,多西河谷正新建年产 60 0万 t的球团厂 ,该工程预计到 2 0 0 2年 3月份投产。多西河谷称 Tubarao球团厂的现代化改造工程将使用全球各个供应…     

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.     

Craniometaphyseal and craniodiaphyseal dysplasia, head and neck manifestations and management

Mechanical allodynia (MA) following hand injury is a well-documented clinical problem. The purpose of this pilot study was to examine the relationship between hand MA and the upper limb tension test (ULTT). The ULTT mechanically stresses the neural structures from the C5/6/7 neural foramina to the median nerve distally. This study examined 29 subjects with unilateral hand MA before and after a 2-week neural self-mobilization programme. There was a significant difference between the subjects' affected and unaffected sides when tested using the ULTT, both in reproduction of symptoms and in reduced range of motion of the ULTT. Following the self-mobilization program, there was an improvement in the range of the ULTT, and subjects reported a reduction in their symptoms. Complete recovery was not obtained in all cases. The results of this study suggest that the ULTT is a useful tool both in assessment and treatment of subjects with hand MA.     

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。