高碱性高玻璃化连铸保护渣

一般的保护渣已不再适合于浇注高合金钢，而需开发一种新型的保护渣－高碱性高玻璃化连铸保护渣可适用高合金钢及薄板坯连铸的需要。本文简介了现用保护渣及双高保护渣的特点，论述了双高保护渣的生成机理，及配制双高保护渣的原则、用途，并列出了双高保护渣的例子。     

高碱性高玻璃化连铸保护渣组成与性能关系及其应用

通过测定高碱性高玻璃化连铸保护渣（双高保护渣）的粘度，熔化温度，回归出双高保护渣组分与粘度，组分与熔化温度的关系式，并得到要互作用下组分对保护渣粘度，熔化温度的定量影响，配制双高保护渣进行工业试验，效果良好。     

新型连铸中间包碱性保护渣的应用试验

研制出一种新型连铸中间包碱性保护渣代替炭化稻壳。试验及应用结果表明，碱性保护渣明显优于炭化稻壳。吸收夹杂性能较好；缩短了中间包整备周期，处长了使用寿命；保温和防氧化性能较好；改善了工人的劳动条件；技术经济效益显著。     

高碱性高玻璃化连铸保护渣组成[1]与性能关系及其应用

通过测定高碱性高玻璃化连铸保护渣(双高保护渣)的粘度、熔化温度,回归出双高保护渣组分与粘度、组分与熔化温度的关系式,并得到相互作用下组分对保护渣粘度、熔化温度的定量影响;配制双高保护渣进行工业试验,效果良好.     

双高连铸保护渣在齿轮钢(20CrMnTi)连铸过程中的应用

针对特殊钢连铸过程中结晶保护渣不仅要良好地润滑铸坯，还要尽可能多地吸收及同化钢液中上浮的非金属夹杂物的特性，深入研究了具有高碱性高玻璃化特性的连铸保护渣生产成机制，并针对含钛齿轮钢连铸过程的问题，研制了特定的双高渣，成功应用于生产实践。     

复合碱性中包渣研究及工业应用

介绍了重庆钢铁股份公司炼钢厂为了提高钢水洁净度,减缓因Al2O3夹杂堵塞水口造成事故。借助冶金熔渣有关知识,结合炼钢厂连铸生产实际开展中包碱性保护渣研究,解决了中包碱性保护渣在连铸生产应用中遇到的一些问题,使得生产顺行,同时取得了较好的冶金效果。     

对AOD炉和铬转炉炉渣冶炼行为的试验和计算研究

铬转炉和AOD炉通过氧化钢水中的硅和碳来生产不锈钢。为了延长铬转炉镁碳炉衬和AOD炉白云石炉衬的使用寿命，就必须减少炉子某些关键部位耐火材料的侵蚀（特别是铬转炉中的风口区域和AOD炉中的风口、耳轴区域），或在炉役期间采取措施保护这些部位。渣保护就是延长转炉炉衬寿命的一个选择方案。渣保护是在出钢后把转炉渣留在炉中，并使其在转炉炉衬的关键部位凝固的方法。在本研究中，铬转炉和AOD炉的渣保护与常用的碱性氧气转炉（BOF）的溅渣护炉不同，不采用溅渣，而是通过前后摇炉使熔渣涂敷在炉壁上的。     

连铸结晶器保护渣的结晶温度

当一种保护渣冷至低于液相线温度时.渣可能会结晶或不结晶,这取决于自身的化学成分和热循环,含二氧化硅的保护渣容易冷却并在平衡状态下在结晶温度范围内形成玻璃体.另外,富含CaO的碱性渣却难于急冷形成玻璃体.只是在稍低于液相线的温度时液体可能出现结晶.     

IF钢用连铸保护渣研制

结合攀钢IF钢连铸工艺条件,研究了碱性材料、熔剂对保护渣熔化性能的影响和熔速调节剂配加模式,设计出了保护渣配方.工业试验表明,研制的预熔保护渣用于IF钢浇铸时,在结晶器内熔化良好,试验铸坯表面无清理率达到98.5%,铸坯增碳控制在2×10-6左右(质量分数).     

珠钢洁净钢生产

综述了珠钢洁净生产所采取的系统控制与主要技术措施：优化配料技术、全程泡沫渣操作终点控制、脱氯制度、吹氩制度、精炼碱性白渣操作、钙处理、弱搅拌、保护浇注以及合适的保护渣等．旨在不断提高钢水洁净度。     

快速测定有机胺中氯离子含量

实验以硫氰酸汞乙醇溶液为显色液,采用分光光度法于460 nm波长处测定有机胺中氯离子含量。通过实验对显色剂用量、显色时间、加酸量等条件进行了优化,并进行了干扰离子消除试验。本方法的检出限为0.0342μg/mL,方法回收率93.10%~104.60%,RSD≤1.75%,检测快速、准确、灵敏度高、精密度好,适用于有机胺中氯离子含量的测定。     

含铅钼矿综合回收新工艺研究

陕西洛南县含铅钼矿床矿石工业类型主要为细粒级碳酸岩脉型钼(铅)矿石,其钼平均品位0.06%～0.078%之间,铅品位0.14%～0.25%。本研究采用选冶联合新工艺,使该资源中的有价金属钼、铼和铅金属获得了高效综合回收与利用。新工艺采用柴油作钼的捕收剂、再磨时加活性炭脱药、磷诺克斯抑制铅、钼精矿湿法除铅等技术,获得了53%的高品位钼精矿。彻底解决了矿山钼精矿品位低、含铅量高、冶炼高铅钼精矿污染环境等生产难题。对钼中矿采用石灰作矿浆pH调整剂、糊精作黄铁矿抑制剂、硫化钠作方铅矿活化剂,乙基黄药与戊基黄药组合药剂作捕收剂、2#油作起泡剂、水玻璃作脉石矿物抑制剂,经3段浮选分离使钼矿中的铅得到高效分离回收,获得了铅品位为60%的铅精矿。     

A New Technology for Copper Slag Reduction to Get Molten Iron and Copper Matte

The change of iron composition as well as the removal of copper from iron was investigated in the reduction process,and a new way to deal with copper slag was proposed.The iron in copper slag exists mainly in the form of fayalite,and the copper sulfide content accounts for just about 50%.Therefore,the magnetic separation as well as grinding floatation method is not suitable,and a pyrogenic treatment on copper slag is necessary.The carburization and desulfurization process is restricted to a degree within the carbon composite pellets,and copper matte phase precipitates from copper slag in the reduction process,which is immiscible with molten iron and slag.The copper content decreases to 0.4% as the carbon content in molten iron reaches 3.84%,and the removal ratio of copper from molten iron approaches to 80%.The reduction and sulfurization process can be completed in one step,and the copper is separated from iron based on the ternary system of iron-matte-slag.     

Renal ATPases twenty-four hours after uninephrectomy: the role of IGF-1

The purpose of this article is to discuss the concept and phenomenon of intuition in nursing. With an overview of theories of intuition in philosophy and empirical research as the starting point, the authors discuss the conceptualization of intuition in nursing. Concept analyses, intuition as phenomenological nursing knowledge, intuition as clinical knowledge and intuition as spiritual connection are discussed. The authors conclude that the conceptions of intuition in nursing differ with respect to their philosophical underpinnings and that it can be questioned whether 'intuition' is always a proper term for the kind of knowledge investigated. Intuition is seen as an important concept in nursing, but there are still philosophical as well as empirical and practical problems to investigate.     

快淬对合金Mm(NiCoMnAl)5.1B0.1组织及电化学性能的影响

对铸态和快淬态贮氢合金Mm(NiCoMnAl)5.1B0.1的微观组织和电化学性能进行了研究。发现快淬态合金基本上消除了第二相，快淬合金组织中存在一定比例的非晶相，并且随着淬速增加非晶相的量增多；与铸态合金相比，快淬态合金的放电容量有所降低，但循环寿命显著提高，这主要是由于快淬导致晶粒细化和形成一定数量的非晶态组织。     

离子选择电极测定氟离子方法的改进

对离子选择电极测定氟离子的方法进行了改进,即先测样品溶液的电位值,再在空白溶液中逐滴加入氟标准溶液,直至电位值与样品溶液电位值相同,由推导的计算式即可简便得出样品溶液的浓度,测定结果与一次标准加入法的测定结果相符;并简单介绍了氟离子选择电极法中pH值、缓冲溶液和电极斜率S对氟离子测定的影响。     

The basis of general practice, its content and relation to training

The present status is the newly defined discipline of general practice is briefly outlined. The reasons for its worldwide upsurge in the past decade and the relative failure of South Africa to keep abreast are reviewed. A brief exposition is given of the knowledge and skills required for general practice, the consultation, the clinical process and the content of what in some countries is regarded as family medicine. The difference in ethos between 'doctor-orientated' and 'patient-orientated' medicine is discussed. The latter approach is essential to general practice, in which the attidudes of both doctor and patient and their interactions are known to have an effect on the clinical process. The non-directive educative approach is discussed in relation to undergraduate and postgraduate training, and the attempts to make postgraduate general practice examinations valid and reliable, so that they evaluate the actual day-to-day activities of the doctor, are alluded to. The content of general practice is as yet not clearly identified and the problems encountered in delineating these as well as suggested approaches are presented. It is concluded that in South Africa no serious attempts have been made by legislative bodies and most medical educational institutions to recognize general practice as a new displine in spite of pioneering work achieved by the Faculty of General Practice of the College of Medicine of South Africa.     

Polymerization of human prion peptide HuPrP 106-126 to amyloid in nucleic acid solution

The human prion peptide PrP106-126 polymerizes in the presence of DNA both in its circular and linearized forms under solution conditions where the peptide alone does not polymerize. The polymerization process has been monitored by the increase in the fluorescence of anilino naphthalene sulfonic dye which detects the availability of the hydrophobic surface(s) in the aggregate as a consequence of polymerization. The polymerization is a nucleation dependent phenomenon as is evidenced from an existence of a lag period before the onset of the polymerization and a strong dependence of the polymerization on the prion peptide concentrations. The reaction is dependent on the pH as seen from rapid polymerization at pH 5 compared to the reaction at neutral pH where no polymerization is observed after a relatively long period of incubation. The polymer has been characterized as amyloid by using new absorbing and emitting species resulting from the interaction of the polymer with the amyloid specific fluorescent dye, Thioflavine S. This is probably the first demonstration that an endogenous macromolecule can influence the polymerization of a prion peptide. We have previously shown that there is a conformational change in the nucleic acid as a consequence of this interaction. This prion peptide is considered as a model to understand prion diseases as is evidenced from its toxicity towards primary brain cells in culture. The peptide encompasses one of the important amyloidogenic regions of the normal cellular prion protein. Demonstration of nucleic acid induced polymerization of the normal and scrapie prion isoforms accompanying a change in the nucleic acid conformation can establish a possible role of nucleic acid in prion disease.     

Bayesian Probabilistic Approach to Structural Health Monitoring

A Bayesian probabilistic methodology for structural health monitoring is presented. The method uses a sequence of identified modal parameter data sets to compute the probability that continually updated model stiffness parameters are less than a specified fraction of the corresponding initial model stiffness parameters. In this approach, a high likelihood of reduction in model stiffness at a location is taken as a proxy for damage at the corresponding structural location. The concept extends the idea of using as indicators of damage the changes in structural model parameters that are identified from modal parameter data sets when the structure is initially in an undamaged state and then later in a possibly damaged state. The extension is needed, since effects such as variation in the identified modal parameters in the absence of damage, as well as unavoidable model error, lead to uncertainties in the updated model parameters that in practice obscure health assessment. The method is illustrated by simulating on-line monitoring, wherein specified modal parameters are identified on a regular basis and the probability of damage for each substructure is continually updated.     

甘肃省武都区塘坝金矿工程地质条件特征

塘坝金矿区位于甘肃省武都县,属琵琶乡管辖,气候为温暖带大陆性季风湿润气候,区内水系发育,属长江流域嘉陵江水系。塘坝金矿床是赋存在坚硬、半坚硬的碳酸盐岩和碎屑岩层中,灰岩和硅质角砾岩等硬性岩石一般为完整-较完整,岩体结构类型为块状结构,岩石稳定,工程地质条件较好,千枚岩等软弱岩石和断裂影响范围内的岩石一般稳定性差,岩石较破碎,岩体结构类型主要为层状碎裂结构和散体结构。矿区工程地质勘探属于第三类——层状岩类,工程地质勘探的复杂程度划分为中等型,属工程地质条件中等矿床。