58型焦炉全火道揭顶分段检修技术

马钢煤焦化公司２＃焦炉系６１年投产的５８－Ｉ型６５孔炭化室焦炉。８０年代末,已进入衰老期的２＃焦炉难于维持正常生产。１９９２年底至１９９８年间,马钢公司对２＃焦炉全炉分段实施燃烧室全火道揭顶中修,有效地延缓２＃焦炉的衰老,为实现和维持马钢二百万ｔ焦炭产量起到了积极的作用。本文对全火道揭顶中修各主要环节作了比较详细的介绍,并且对中修过程中所采取的一些方法作了简介。     

焦炉热修补方法和新材料的生产实践

对梅山焦炉炉体损坏的原因进行了分析，针对原修补中存在的问题进行了探讨，并不断探索和寻找热修补方法和新材料进行炉体维护，延缓炉体损坏的速度，达到延长焦炉使用寿命的目的。     

焦炉老龄化阶段炉体维护技术探讨

文章通过对包钢焦化厂4座IIBP型焦炉的现状的分析,明确了焦炉衰老损坏的真实原因.根据多年来对炉体维护的实践经验,探讨其在老龄化阶段的炉体维护技术,完善焦炉的热修管理工作,对保证焦炉在老龄化阶段的稳定生产具有重要意义.     

焦炉炉体状况分析及维护

梅山炼铁厂炼焦车间1^#、2^#焦炉已经超过其服役年限，炉体各部位损坏日趋严重，已经制约焦炉正常生产。本文对焦炉炉体状况和损坏原因进行分析，并进一步抓好炉体维护工作，延长焦炉使用寿命，促进焦炉生产。     

焦炉炭化室墙的热修补

日本钢管京滨1号焦炉110炭化室,由于事故使炉墙砖有一部分损坏。1982年10月和1984年12月使用高铝砖进行了更换并热修补。其后由于修补部位及其周围进一步损坏,造成炭化室不能正常生产,故又用硅砖进行了第三次热修补。     

大型回转轴承损坏原因分析与措施研究

为使回转轴承良性运转,延缓其劣化速度,延长使用周期,文章通过对宽厚板钢包大型回转轴承线上运行趋势的研究、对损坏的大型回转轴承下线后解体研究调查分析及对大型回转轴承损坏主要影响因素的解析,结合大型回转轴承实际生产中的各种不确定的参数,综合维养、安装及使用等方面采取措施,延缓了设备劣化速度,延长了其使用寿命,有效提高了宽厚板铸机生产的连续性及设备的运转率。     

焦炉集气管压力自动调节的技术改进

焦炉集气管内煤气压力是焦炉生产中一个很重要的控制参数。如果这一参数控制不好,压力忽高忽低,且经常出现负压,空气进入炭化室与焦炭直接接触,使焦炭烧成灰,硅砖烧熔,将造成炭化室墙面损坏,出现事故。以前,焦炉集气管压力自动调节常采用液压调节器,大多使用不正常。近几年来,改用了电动调节器,却出现了执行机构动作频繁,影响调节质量和使用寿命等问题。通钢82年再次对焦化分厂2~#焦炉集气管压力自动调节进行了技术改进,取得了良好效果。     

略论焦炉砌体的损坏及防止对策

服务年限的长短是评定焦炉是否“长寿”的一个重要指标,但这并不全面。实际应以炉室的周转次数作为主要指标。因为这是焦炉直接损坏的原因所在。以我厂目前仍然正常生产的61型焦炉为例,它属于快速炼焦的小型硅砖焦炉,1971年投产至今已服务17年多,与我国现在常用的一些炉型比较,相当于后者25年到36年(见表1),而且还可     

7.63m焦炉Proven系统概述及典型故障处理

首钢京唐公司7.63m焦炉采用"单个碳化室压力调节系统",简称Proven系统,此系统可以解决碳化室压力波动而导致焦炉冒烟和碳化室长时间负压而影响焦炉寿命问题。Proven系统由压力控制器、气缸等10部分组成,它针对焦炉生产中的推焦、装煤、结焦三个过程进行相应控制,从而达到对整个焦炉生产压力的控制。在日常生产过程中,Proven系统经常出现故障,但是通过局部改造及定期巡检维护可以减少故障的发生,保证焦炉的正常生产。     

7.63 m焦炉车辆自动对位故障处理方法

7.63m焦炉是目前国内炼焦的发展方向,其车辆的控制水平属于世界先进水平,但在日常生产过程中经常发生自动对位故障,严重影响焦炉的正常生产.笔者完成国内第1套焦炉车辆太钢项目的调试及维护,在实际生产过程中解决了大量故障,积累了丰富经验,本文将经常发生的自动对位故障现象及处理方法进行归纳.     

富氧顶吹炼铅生产实践中喷枪损耗的原因分析及对策

主要阐述了富氧顶吹炼铅过程影响喷枪损耗的主要因素,进一步深入分析与总结了这些主要因素对喷枪损耗的影响情况,并在生产实践中采取相应的技术控制及改进措施,有效降低了喷枪的损耗,保证喷枪使用寿命达到了预期的要求,为富氧顶吹炼铅炉的正常运行奠定良好的条件。     

Perception of expiratory flow by asthmatics and non-asthmatics during rest and exercise.

The perception of normal and asthmatic individuals was assessed using a magnitude production procedure in a series of 3 studies, testing 10 male and 10 female 20–30 yr old Ss during rest, then 9 female 20–35 yr old Ss during submaximal exercise (both groups with no history of respiratory disease), and 10 12–18 yr old male asthmatics using no steroid medication and 10 nonasthmatic age- and sex-matched controls during rest and submaximal exercise. Findings do not support an abnormality in perception occurring during exercise in asthma patients. (18 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

500kA铝电解槽早期破损剖析

电解槽是铝电解生产的主体设备,电解槽的寿命长短直接影响到吨铝生产成本,进而影响企业经济效益。电解槽达不到设计寿命,甚至出现早期破损,会增加吨铝均摊成本,电解槽长寿是铝行业研究的长期课题。通过对某电解铝企业500kA电解槽破损后进行刨炉研究,认为其早期破损的原因主要是所用筑炉防渗料质量存在缺陷、焙烧升温速度过快、技术条件匹配不合理、系列电流强度波动较大等,并在此基础上提出了预防电解槽早期破损的措施,为电解槽提高槽寿命提供借鉴和参考。     

Attitudes toward life and death in suicidal, normal, and chronically ill children: An extended replication.

Evaluated the attitudes toward life and death held by 23 6–12 yr old suicidal children, 28 6–22 yr old chronically ill children, and 33 6–22 yr old normal children by examining 4 attitudes toward life and death: attraction to life, repulsion by life, attraction to death, and repulsion by death. The measurement of the intensities of these attitudes was obtained by means of the Ss' quantitative responses to questions that followed fairy tale stories. Each of the stories represented 1 of the 4 attitudes. Parallel forms of the test were administered in a time interval of 6 wks. ANOVA showed that the 4 attitudes were distinguishable from each other. The response profiles of suicidal Ss showed significantly lower repulsion by death than those of normal Ss. Chronically ill Ss presented the highest degree of repulsion by life and scored higher than normal Ss on attraction to death. On repulsion by death, they scored higher than suicidal Ss but lower than normal children. All Ss scored well on attraction to life. Findings document the construct validity of the theoretical model. (13 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

环冷机挡料墙受力分析及改造

首秦龙汇矿业有限公司球团厂自投产以来,环冷机挡料墙陆续出现了一些问题,包括耐材脱落、后侧壁板烧坏、挡料墙损坏、脱落等,严重影响了正常生产。为此,我们通过计算、分析,提出了一系列改造措施并予以实施。改造后,挡料墙使用寿命由三个月延长到至少一年半,取得了很好的效果。     

Effect of somatostatin and octreotide acetate on OP-CCK-stimulated exocrine secretion in the denervated canine pancreas

A 54 year old patient of average intelligence with a severe and enduring loss of old autobiographical memories after herpes simplex type 1 infection is described. She was tested with a comprehensive neuropsychological battery two years after the infection. Special emphasis was laid on examining different aspects of retrograde memory. The neurological examination involved MRI and SPECT. Brain damage was found mainly in the right temporofrontal region, but minor left sided damage to this region seems possible. The patient was in the normal or slightly subnormal range for all tested anterograde memory functions, but manifested severe retrograde memory deficits with respect to episodic old memories and more moderate deficits in tests of general knowledge (semantic old memories). It is concluded that the ecphory of old autobiographical memories relies heavily on an activation of the right lateral temporofrontal junction area, but that probably only some complementary left hemispheric damage to these regions will lead to major and persistent retrograde amnesia. Alternatively, the disconnection between major prefrontal and posterior cortical regions may provide a basis for retrograde amnesia.     

延长硅锰合金电炉出铁口使用寿命的实践

针对硅锰合金电炉的出铁口使用寿命短及易损坏的问题，通过损坏机理分析方法对出铁口寿命短及易损坏原因进行全面分析，并从电炉工艺操作、耐火材料砌筑方法、电极操作方式等方面进行改进，最大限度地延长出铁口使用寿命。经实际应用证明该方法在冶炼生产中取得实效。     

烧结机机尾固定筛的改进

针对烧结机机尾固定筛进料口盲板和筛条易损坏,寿命短,影响正常生产的问题,通过分析机尾固定筛的工况条件,在力求提高性价比的前提下,对其结构和材质进行了改进.改造后机尾固定筛的使用寿命达到1年,实现了与其它设备同步检修的目的.     

大型铰接式卡车安全操作行为标准研究与应用

随着矿山高速发展,矿用铰接式卡车保有量的增加,道路交通运输日益繁忙,但随之而来的违规操作行为也不断攀升,导致交通事故频发,甚至对生命安全和矿山财产损失造成了极大威胁。通过对铰接式卡车现场安全操作行为标准研究与应用,分析不同工况条件下的现场安全操作行为的标准,总结出安全操作行为标准程序,杜绝违规行为操作发生,保障铰接式卡车安全、高效、稳定的运行,为矿山安全生产创出巨大经济效益,值得全面推广。     

New assessment methods for the residual safety of old steel bridges

A great part of existing steel bridges for roads and rails are riveted structures that were built in the last century. Many of these old bridges have undergone several phases of repair or strengthening after damages in the world wars or due to changes of service requirements. For these bridges the question of the actual safety for modern traffic loads and the remaining service life is put forward. This paper describes a procedure to determine the residual safety and service life of old steel bridges and how a basis can be established on which economic decisions for further strengthening or replacement by a new bridge may be made. This procedure has been developed in close cooperation between the Institute for Ferrous Metallurgy and the Institute for Steel Construction of RWTH since 1982. It has been applied to many steel bridges in particular in Eastern Germany and also to other structures susceptible to fatigue, e.g. guyed masts, antennae, machinery parts etc.