冶金新技术20行

超低头连铸机超低头连铸机是西德曼内斯曼公司于1963年2月16日首先在世界上应用的一种新型连铸机。与普通连铸机相比,它的最大特征是连铸机的高度小,其高度一般小于5m。由于这种连铸机的高度小,因而它所需要的连铸车间厂房的高度也低。与普通连铸机相比,它的基建投资成本可降低20～30%。     

专线化(板坯)连铸机设计

随着对连铸机认识的不断深化,其设计理念也逐渐由传统"万能"连铸机转变为专线化恒拉速连铸机。以宝钢湛江钢铁有限公司同时建设多台连铸机为例,详细阐述了专线化恒拉速连铸机的具体内涵,并深入分析了传统的连铸机与专线化恒拉速的连铸机在设计理念、拉速范围的差异性以及优缺点。     

神户钢铁公司加古川厂使用新板坯连铸机生产优质钢材

一、前言 1984年3月以来,神户钢铁公司加古川厂一直在使用一种新型的板坯连铸机。这种孤型连铸机是类似1973投入运转的那种连铸机的改进型。在原有连铸机十年的操作经验上,我们将最新技术用于这种新型连铸机。所以,新的连铸机在产量和质量两方面都取得了极大进展。表1示出这种新型板坯连铸机的各类性能参数。     

小方坯连铸

概述1.1连铸发展概况世界上第一台浇注钢水的试验连铸机由德国人容汉斯40年代在德国建成，当时就已提出振动的水冷结晶器、浸入式水口和保护浇注等技术，这为现代连铸机奠定了基础。50年代，连续铸钢进入工业性试验阶段，在前苏联、英国、意大利、加拿大等国建成了试验连铸机，浇注的最小断面50mm×50mm，最大断面180min×800mm。60年代，连续铸钢进入工业应用阶段．不少工厂相继建成了连铸机，除立式连铸机外，出现了立弯式板坯连铸机、弧型板坯连铸机、弧形小方坯连铸机、圆坯连铸机、工字梁连铸机和离心旋转生产管坯的立式连铸机。英国谢…     

高冷却强度结晶器系统及高速连铸设备

据1998年统计,我国有连铸机280多台,其中小方坯连铸机约220台750流.这些小方坯连铸机的生产水平普遍较低,年产量超过8万t的只有10多台,许多连铸机的年产量不到5万t,主要原因是连铸机的浇铸速度太低.     

武钢第二炼钢厂连铸机改造方案及其工艺分析

介绍了武钢第二炼钢厂连铸机改造方案 ,并分析了现有连铸机的工艺缺陷以及本次改造拟将采用的技术措施 ,比较了直弧形连铸机与全弧形连铸机以及多点弯矫与连续弯矫方式的不同特点 ,同时 ,对武钢二炼钢厂连铸机系统下一步改造工作提出了建议。     

对我省连铸发展的浅识

1概况我省具有代表性的钢铁企业──酒钢和兰钢现有正常生产的7台连铸机，其中酒钢小方坯连铸机3台，板坯连铸机2台，兰钢小方坯连铸机2台。除兰钢1号连铸机是从奥钢联引进的而外，其余6台均为国产连铸机；这7台连铸机先后投产于“七五”中期至“九五”中期；与这些连铸机相匹配的炼钢设备分别是酒钢的SO吨转炉和兰钢的IO吨转炉。现将这7台连铸机的设备工艺参数和1997年部分生产技术指标的年平均值分别列于表1与表2。2生产现状酒钢和兰钢7台连铸机的生产现状见表2，表中数字为1997年全年的统计结果。由表2可见：门）酒钢1、2、3号方坯机和…     

宽板连铸机安装重点和难点的分析

宽板连铸机的安装精度直接影响到连铸机生产铸坯的质量、连铸机使用寿命、能介消耗以及生产成本,最终影响企业经济效益等。为此本文结合Mobarakeh Steel Company板坯连铸机((900~2000)X(200/220/250))的安装实践,对宽板连铸机安装过程的重点和难点进行了分析和研讨。     

小方坯连铸机及其工艺特点

本文描述了国内外小方坯连铸机的概况;对引进意大利Con-Tinua BSe-60-150四机四流连铸机工艺参数进行了计算;阐述了小方坯连铸机的工艺特点;提出了建设小方坯连铸机值得注意的一些问题。     

连续铸钢技术的发展

连铸技术在钢铁工业的应用,近几年来得到很快的发展.国外连铸技术的提高主要表现在:1.连铸机生产能力的提高;2.连铸设备设计及制造技术的改进;3.铸坯质量的提高;4.浇铸钢种的扩大;5.自动化及过程控制技术的应用.还发展了一些新型连铸机,如离心连铸机、水平连铸机、带式连铸机和轮带式连铸机等.我国从1957年就开始研究连铸技术.1960年试验成功了弧形连铸机.1964年建成了第一台弧形板坯连铸机.随着我国钢铁工业的发展,连铸技术必将得到相应的发展.我国现有的一些小型轧机需要50～70毫米小方坯,因而提出了发展高速小方坯连铸机解决供坯的问题.     

Laudatio: Prof. Dr. med. Dr. phil. Dres. h. c. Heinz H?fner

During the course of a year, there are many healthcare workers nationwide who sustain sharps injuries whilst carrying out their duties. Staff who work in the Accident and Emergency (A & E) units are no different from anyone else in this respect. The emotional cost of such an accident cannot be calculated, whereas the financial costs can. This article aims to show how the cost of an injury to a member of staff can be calculated, thus allowing a manager to assess the financial implications of sharps injuries to their department. In the absence of access to an Occupational Health (OH) department, most A & E units have to respond to sharps injuries to healthcare workers in the hospital. This task must be attended to by the medical staff as well as the nursing staff of the A & E unit. Within the following text the appropriate responses and methods to ensure uniformity of response are discussed. The tables and the calculation figures shown are taken directly from the information held in the St James's University Hospital Trust's OH department. All calculations are based on the middle band of the salary scale for each discipline. Accurate costings for each member of staff injured cannot be shown in this article, but the general principle is laid down and can be easily followed for any situation.     

1969 C.P.A. Institute.

Presents the program for the C.P.A. Institute entitled "The Role of Counseling Services on the Contemporary Campus." The Institute was held on June 2-3, 1969. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Rats, Man . . .

Comments on the article by Richter entitled "Rats, Man, and the Welfare State" (see record 1960-02810-001). The commenter notes that in his article Richter did not indicate how hereditary and environmental factors were controlled. In comparing the hereditary survival characteristics of wild versus domesticated rats, it would be essential that the environmental influences on the survival characteristics of the wild rats should be ruled out. Another factor to be considered is that the wild state may offer a diet and other environmental influences, which in the life of a single individual would produce organic changes, accounting for some of the differences between wild and domestic rats. It would seem that the most effective way to determine the hereditary differences between wild and domestic rats would be to create a wild group, composed solely of the offspring of wild rats. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The blood-brain barrier. I. Histology. Physiology. Embryology. Transport

The concept of blood-brain barrier (bbb) arose in the beginning of the 20th century after report that the dyes injected intravenously did not appear in the brain. The idea and definition of bbb has been changed many times since then. We present current opinion concerning bbb, its histology, embryology, ultrastructure and function on the ground of a review of the recent literature.