电还原-P_(507)萃取分离法回收稀土新工艺试验研究

从废钕铁硼中回收稀土旧工艺,工艺流程长、消耗化工材料多,回收成本高;研究一种工艺流程短、消耗化工材料少、回收成本低的从废钕铁硼中回收稀土新工艺非常必要。试验表明:电还原-P507萃取分离法从废钕铁硼中回收稀土新工艺可行,与旧工艺比较,回收1 t稀土可节约成本6033.04元;新工艺回收稀土收率为96.10%。     

起止回收CO体积分数影响转炉烟气能量回收的规律分析

转炉炼钢工序转炉烟气显热、潜热回收是"负能炼钢"的核心.以某钢厂300 t顶底复吹转炉为例,建立了转炉烟气中CO、O2体积分数随吹炼时间变化的特征模型,分析了起止回收CO体积分数对转炉煤气回收量及热值、蒸汽极限回收量的影响规律.结果表明,当起止回收CO体积分数增加±1％,转炉煤气回收量减少±0.50 m3/t,热值增加±22.3 kJ/m3,蒸汽极限回收量增加±1.77 kg/t.最后从转炉煤气回收、转炉烟气高温显热回收、转炉吹炼初末期低热值煤气回收利用三个角度分析了提升转炉烟气余热余能回收利用率的途径.     

铌回收料生产铌铁合金工艺研究

介绍了对铌回收料进行分析确定铝热生产工艺,实现铌回收料生产铌铁合金工艺方案。经过试验确定工艺的最优反应热量,通过试验摸索铌回收料中铝元素的性质,确定铌回收料中铝元素参与反应的比例,从而实现铌回收料生产满足国标要求的铌铁合金,实现铌资源有效回收利用,同时产生经济效益。     

八钢120t转炉煤气及蒸汽回收工艺优化

为提高3座120 t转炉的煤气及蒸汽的吨钢回收量,八钢在煤气回收方面将煤气回收条件的参数进行了调整,CO回收控制参数调整到30%开始回收,25%停止回收;优化转炉煤气回收控制程序,将原来转炉下枪3 min后炉口微压差自动PID调节提前到下枪80 s后实施,并根据转炉冶炼的不同时段进行炉口微压差分段控制;操作上进一步优化煤气回收时的降罩操作制度。在蒸汽回收方面优化了转炉烟罩炉口段与裙罩的蒸汽密封及处理余热锅炉补水的除氧器蒸汽消耗工艺。优化回收工艺后,煤气回收率达99.12%。     

烧结过程余热资源回收利用技术进步与展望

 烧结过程余热回收与利用是降低烧结工序能耗的主要手段之一。概述了国内外烧结余热回收与利用技术发展状况,指出了中国烧结余热回收利用中存在的不足。从工艺流程、技术特点的角度重点阐述了烧结矿余热竖罐式回收发电工艺和烧结过程余热资源分级回收与梯级利用技术;给出了烧结烟气余热回收与脱硫脱硝一体化工艺的基本思路。提出应积极推广烧结过程余热资源分级回收与梯级利用技术,加快开发烧结矿余热竖罐式回收发电工艺,深入倡导烧结烟气余热回收与脱硫脱硝一体化的理念,为中国烧结工序的节能减排奠定技术基础。     

高炉均压煤气回收技术的改进及应用

对高炉均压煤气回收技术的改进及应用进行了总结。简要阐述了高炉均压煤气回收工艺,认为在不影响炉顶装料作业率的前提下,根据实际应用条件可选择"自然回收"或"自然回收+强制回收"工艺。针对第一代均压煤气回收工艺中存在的问题,第二代均压煤气回收技术进行了改进,即取消了第一代回收装置中的缓冲罐;在除尘器内加大缓冲区域,将缓冲罐和除尘器的功能合二为一,并于2015年在1280m~3高炉上成功应用。     

动力锂电池回收利用现状与展望

随着新能源汽车及各种电子产品的发展,其核心元件动力锂电池的回收利用问题受到了越来越多的重视。根据当前所采用的处理方式,将动力锂电池的回收工艺分为干法回收与湿法回收,并对其所用具体方法进行了总结。对废旧锂电池的回收价值、当前回收策略及主要回收技术进行了综述。同时,针对市场回收体系对未来锂电池回收利用时要考虑的问题作了进一步分析,对目前回收利用过程中所面临的潜在性问题进行分析与概括,最后给出了关于完善未来锂电池工业与市场回收体系的可行性建议,以期望该回收行业有更好的发展。     

转炉煤气回收技术研究与应用

对转炉煤气回收理论模型的仿真与实际煤气回收趋势图进行了分析对比,提炼出理想煤气回收趋势图。其次分析了影响煤气回收的主要因素,并提出相应的对策。     

废旧动力磷酸铁锂电池资源化回收技术研究进展

对当前国内外废旧磷酸铁锂电池的回收技术进行了较为全面的阐述,其中包括常采用的干法回收技术、湿法回收技术以及生物浸出回收技术,并根据各方法的优缺点进行了分析比较,同时对废旧磷酸铁锂电池的回收技术发展作了初步的展望。     

高炉熔渣干式显热回收技术研究进展

高炉熔渣含有大量的热,将其回收利用具有极大的经济和社会效益。传统的水淬工艺对熔渣显热基本没有回收,干式显热回收技术得到国内外研究者越来越多的关注。为此,分析了熔渣显热回收的基本问题和技术难点;列举了已研究的各种干式显热回收典型工艺;介绍了旋转杯熔渣粒化技术、水蒸汽 甲烷重整渣热回收技术等最新研究进展,对不同回收工艺进行了综合评价;并展望了熔渣显热回收技术的发展前景。     

Benzimidazole resistance in cyathostomes in horses in the Ukraine

The efficacy of treatment with cambendazole was tested in 1-year-old horses on a farm in Dubrovka, Ukraine. Thirty-five horses were treated. Their egg output was compared on the day of treatment and 14 days later with that of 33 untreated horses. Before treatment the mean number of eggs g-1 faeces was 614 in the controls and 766 in horses that had been treated. After 14 days the mean egg output in the controls was 580 and in the treated horses 369. This means a reduction of 54.5%. Only cyathostome larvae could be cultured from faeces collected after treatment. It can be concluded that benzimidazole resistance in cyathostomes is present in the Ukraine.     

重庆高校推进产学研合作的案例分析

以重庆大学、重庆邮电大学和重庆理工大学为例,剖析重庆高校推进产学研合作的基本模式,已经取得的突出成绩,分析总结其基本经验.从完善政策法规体系、强化经济调控、建立组织机构、加强中介建设及开展国际产学研合作等方面,提出了深入推进重庆高校产学研合作的对策建议.     

Apoptosis in experimental myocardial infarction in situ and in the perfused heart in vitro

We report the appearance of apoptotic cells in experimental myocardial infarction (rabbit heart) in in situ and in vitro preparations. Apoptosis was recognized by intravital staining with Hoechst 33342 (Ho342), by nick-end labeling (TUNEL) and by DNA laddering. A steady rise in the relative number of apoptotic cardiomyocytes (apoptotic index) was noted in in situ preparations. Apoptosis was first noted 6 h after the onset of ischemia with its highest value occurring after 72 h. Apoptotic nuclei were absent in remote areas of the left and right ventricles. Apoptotic nuclei within the infarcted area showed diminished intensity of Ho342 fluorescence. Three days after ischemia, a border zone adjacent to the infarcted area consisting of apoptotic macrophages was recognized. A novel finding was the appearance of apoptotic cardiomyocytes in the isolated perfused ischemic heart. Occurring as early as 50 min after the onset of ischemia, a high apoptotic index was present adjacent to the ligature placed around the coronary artery. This observation provides the opportunity to selectively examine factors leading to apoptosis in the ischemic heart under controlled experimental conditions.     

Fractures in childhood in Khartoum

A prospective study of fractures in 231 children received at Khartoum North Teaching Hospital(KNTH) was carried out for a period of six months. The incidence of child fracture rated as one per day, then it increased from the age of 5 years onwards in boys and between 6 and 8 years in girls. Most injuries were sustained during the day time, especially between late afternoon and sunset. 82% of injured children presented to a medical facility, while 18% were taken to native healers first. Non-road traffic accidents accounted for 84% of the fractures mainly due to sports, domestic injuries and falls; whereas road traffic accidents were 16% and occurred mainly in pedestrians. Forty three percent of the fractures needed only first aid and splintage while 42% needed closed reduction. Thirty one percent of all patients were treated as inpatients. The long bones were affected in 91% of all fractures, the commonest site being the distal end of the forearm (26%), followed by supracondylar fracture of the humerus (15.6%). In the upper limb, left-sided fractures predominated. The epiphyseal injuries were 3.5% of all fractures, mainly at the distal radial epiphysis. Boys were commonly affected between 13-15 years of age. Open fractures constituted 9.8% of the series and were mainly due to traffic accidents in town dwellers, the most vulnerable bones were those of the leg and foot. Pathological fractures accounted for 2.2% and were due to bone cysts and osteogenesis imperfecta. The problem of child safety and the preventive measures need to be more stressed.     

Botulism in Poland in 1996

A model is presented in which ion translocation through the F0 part of the ATP synthase drives the rotation of the ring of c subunits (rotor) versus the a subunit (stator). The coupling ion binding sites on the rotor are accessible from the cytoplasm of a bacterial cell except for the c subunit at the interface to the stator. Here, the binding site is accessible from the periplasm through a channel formed by subunit a. In the ATP synthesis mode, a coupling ion is anticipated to pass through the stator channel into the binding site of the adjacent rotor subunit, following the electrical potential. Occupation of this site triggers, probably by electrostatic forces, the rotation of the ring. This makes the binding site accessible to the cytoplasm, where the coupling ion dissociates. Simultaneously, this rotation moves again an empty rotor subunit into the contact site with the stator, where its binding site becomes loaded and rotation continues.     

Problems in falling in love

Certain patients enter psychoanalysis because of their inability to love another person. Often they report a repetitive erotic pursuit of desired partners, without being able to experience or maintain loving feelings. Kernberg has understood such difficulties as representing effects of early narcissistic disappointments and/or of difficulties in resolving oedipal conflicts. In this paper, Lacanian concepts of the mirror phase and symbolic love are employed to develop these issues. Sexualization of problems in mirroring may be fused with oedipal conflicts in some cases. An extended vignette is presented to illustrate the technical and theoretical issues.