今年淘汰落后炼钢生产能力的具体方案

20 0 1年 ,国家经贸委将加大落后炼钢生产能力的淘汰力度。据悉 ,国家经贸委已明确第一批 50户小钢铁厂和第二批 53户小钢铁厂、3户铁合金厂实施关停。同时继续对拥有以下落后生产设备的其它小钢铁厂依法实施关停。他们是 :土焦生产设备 (含改良焦生产设备 )和烧结生产设备、18ｍ2 以下 (含18ｍ2 )烧结机 ,50ｍ3以下 (含 50ｍ3)的小高炉 ,公称容量 10ｔ以下 (含 10ｔ)的小转炉 (含侧吹转炉 )、小电炉(机械行业生产铸钢机的小电炉除外 ) ,32 0 0千伏安以下 (含 32 0 0千伏安 )铁合金电炉 ,1998年产钢 10万ｔ以下 (含 10万ｔ)的小炼钢厂横列式…     

包钢炼钢厂小方坯连铸车间工艺方案

包钢炼钢厂拟建设1#小方坯连铸机.该铸机为6机6流,年产150×150mm小方坯70万t,定尺12m,以部分满足高速线材厂对原材料的需求,并为实现五座转炉全连铸奠定基础.     

SiO_2粒度对铜基粉末冶金摩擦材料性能影响

摩擦剂是粉末冶金航空刹车材料制造的关键组元之一。通过粉末冶金方法制备铜基粉末冶金摩擦材料,研究不同粒度规格的SiO2(38~48μm、48~75μm、61~106μm、75~150μm、106~212μm)对材料性能的影响。结果表明,SiO2粒度的变化对摩擦材料压坯密度、烧结后密度及硬度影响不显著;在相同速度及比压条件下,随着SiO2粒度的增大,摩擦因数及磨损量降低,力矩曲线走势逐渐平稳,波动减小。     

气烧石灰竖窑工艺设备的改进与新技术的研究应用

1　前言气烧石灰竖窑(简称气烧窑)是国内冶金企业生产活性石灰的窑型之一,该窑可采用低热值的高炉煤气为燃料,投资省,生产成本低,能生产活性度大于330ml/10min的活性石灰.广东省韶关钢铁集团有限公司(以下称韶钢)现有150m3气烧窑6座,习惯上把1#、2#、3#窑系统称为旧窑(以下简称旧窑),旧窑在实际生产中利用系数低,能耗高,质量差.另3座窑4#、5#、6#窑在2000年底建成投产,习惯上称为新窑(以下简称新窑),针对旧窑工艺、设备在实际生产中存在的问题,以及外部燃料条件煤气热值不断下降的影响,在新窑上进行了工艺、设备改进,并应用新技术,投产一年…     

莱钢降低生铁含硅的实践

通过改善炉料 ,加强管理 ,采用长风口 ,推行高炉标准化操作 ,并不断采用新技术 ,莱钢炼铁厂降低生铁含硅工作取得重大进展。 2× 75 0 m3 高炉生铁含硅由 0 .70 %左右降至 0 .46 %,4× 12 0 m3 高炉生铁含硅由 0 .77%降至 0 .6 0 %左右 ,产量、质量、消耗等各项指标都得到明显改善。     

SiC粒度对铁基粉末冶金摩擦材料性能的影响

本文采用冷压、加压烧结的方法制备了含Si C颗粒的铁基粉末冶金摩擦材料。研究了不同粒度规格(485μm~、250~830μm、180~380μm、150~180μm、75~150μm、~120μm)的Si C对某铁基粉末冶金摩擦材料密度、硬度、摩擦磨损性能等的影响。结果表明:Si C粒度的变化对铁基粉末冶金摩擦材料压坯密度、烧结后硬度及结合性影响较小;随着Si C粒径的减小,铁基粉末冶金摩擦材料的硬度、最大摩擦系数、最小摩擦系数和平均摩擦系数均逐渐减小,磨损量逐渐增大,力矩曲线波动逐渐变大;Si C粒度在180~830μm(-20+80目)时,铁基粉末冶金摩擦材料表现出较优异的摩擦磨损性能。     

食品安全知识

消费者在外就餐注意事项一、选择合适的餐馆1.选择有许可证的餐饮服务单位《中华人民共和国食品安全法》（以下简称《食品安全法》）于2009年6月1日正式实施。根据该法规定,餐饮服务单位取得＂餐饮服务许可证＂后,方可从事餐饮服务经营活动,且须在经营场所亮证经营。消费者到餐馆用餐,     

黄铜矿—水系在高温的E—pH图(续)

<正> 图(2)、(3)是根据以下条件绘制的:1大气压,溶液含铜、铁离子活度均为10~(-3)或者10~(-6)(M),每个含硫组分活度为10~(-1)(M),温度分别为100℃与150℃。从图可看出黄铜矿在水溶液中的稳定区随温度的升高有所收缩,其收缩幅度在碱性区域内比较大,而在酸性区内则很小,硫的稳定区也有类似情况,所以黄铜矿与硫的重叠区升温时变得更小。     

冶金动态

一、综合●上海宝钢集团梅山钢铁公司在目前年产300万t钢能力的基础上,再扩建230万t钢项目开始启动,总投资约172亿元。主要建设内容包括:两个1万t级原料码头,两个5000t级成品码头,一台380m2!烧结机,4座50孔大容积焦炉,1座3200m3!高炉,1座150t转炉,1座150t脱磷转炉,1座162tLF炉,     

世界上线速最快的线材轧机

由巴西圣保罗Viliares设备公司为巴西贝戈尔——内拉钢铁厂建造的世界上速度最高的线材轧机即将投入生产。 贝戈尔——内拉的新单线线材轧机采用150×150mm钢坯,长12m(将来可用180×180mm钢坯),精轧速度120m/s,最高可达140m/s。设计能力为年产60万吨,生产线材和φ5～32mm的成卷线材,卷重2200kg。钢的品种有碳钢和低合金钢。 该机组包括16座粗轧和水平/垂直普通中轧机组,2座悬臂式预粗轧机和10座Vee无扭曲精     

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.