KR脱硫搅拌头用修补料的研究与应用

通过国内某钢厂KR搅拌头破损状况与在线修补的现场调研,分析了影响搅拌头修补使用效果的主要原因,提出了修补料合适的性能要求.通过修补料的原材料选择分析、实验研究和工业性试验,获得了性能优良的搅拌头在线修补料.通过与研制的搅拌头专用浇注料配合使用的工业性试验与实际推广应用,使搅拌头平均使用寿命提高到730次/支以上,达到了降低搅拌头维护量与脱硫成本的目的.     

RH浸入管镁铬质挤压修补料试验研究

介绍了镁铬质挤压修补料的试验室试验研究情况，分析了各试验因素对试样物理性能的影响关系。通过与奥镁公司生产的挤压修补料物理性能的综合比较，从而优选了性能优良的实用配方。     

高炉树脂结合硬质压入修补料的研究

对改性树脂结合的高炉硬质压入修补料的组成、性能进行了研究,探讨了不同组成对性能的影响关系,研制的新型压入修补料高温下流动性好,粘结强度高,使用性能良好.     

镁质修补料研究及其在中频感应炉上的应用

以中档镁砂为主要原料,硅微粉、三聚磷酸钠或六偏磷酸钠为结合剂,925高铝水泥为固化剂,铬微粉与α-A12O3微粉为修补料的微粉原料,研究了结合剂种类与加入量,微粉加入量与添加方式对镁质修补料性能的影响。并介绍了镁质修补料在0.5t中频感应炉坩埚上的实际应用效果。     

高岭土加入量对Al_2O_3-SiC质修补料热震性能的影响

以提高Al_2O_3-SiC修补料的热震稳定性,延长修补料使用寿命为目的,以煅烧高岭土、高铝矾土均化料、SiC、红柱石、硅灰、α-Al_2O_3微粉等为原料,研究煅烧高岭土的加入量对Al_2O_3-SiC修补料热震稳定性的影响。试验结果表明:煅烧高岭土加入量为8%时,1 300℃煅烧后Al_2O_3-SiC修补料热震后抗折强度保持率达到29.3%,常温强度可以保证正常使用;当加入量超过8%后,其各项性能指标反而下降。     

热处理炉炉顶快速修补料的研制与应用

通过对热处理炉炉顶破损与修补困难的原因分析,确定了修补料的技术性能要求,研制了抗热震性能、防爆性能与凝固性能优良的修补料。通过实际应用,取得了优良的应用效果。     

有机添加剂对转炉热态自流修补料烧结性能的影响

以硝基萘为添加剂，考察了转炉热态自流修补料烧结性能的变化。研究发现，加入硝基萘交接班，热态自流修补料的烧损率略有增加，烧结强度明显提高。由此可见，硝基萘对促进热态自流修补料中沥青的碳化起着积极的作用。     

直流电弧炉炉底导电耐火材料的研究

本文介绍了直流电弧炉炉底导电耐火材料的试验研究情况。其中分析了冷态捣打料的电阻率及影响因素并研制了热修补料。     

转炉用热修补料的研制和应用

采用烧结镁砂作为主原料，以改性后的酚醛树脂和粉状沥青作结合剂，研制出了转炉用快速修补料。试验结果表明，通过对结合剂的改性处理，可以在保证修补具有良好高温流动性的同时缩短修补料硬化时间，以满足生产使用要求。     

硬质压入修补料性能与结构的研究

对树脂结合的高炉压入料的组成、性能及微观结构进行研究,探讨不同组成对性能的影响关系,研制出新型压入修补料.它在高温下流动性好,粘结强度高,使用性能良好.     

武钢第一炼钢厂钢包喷补工艺的应用

以碱性喷补料的损毁机理为根据，讨论了该类型喷补料的颗粒分布和结合理论，根据操作条件提出优化方案选取相应的产品，从而获得较好的使用效果。     

RH真空处理装置用耐火材料初探

系统介绍了ＲＨ真空处理装置耐火材料的选择、使用及蚀损状况，提出了真空处理状态下恶劣的使用条件及高的作业率对耐火材料的要求，同时对耐火材料的施工方法，烘烤工艺，修补工艺进行讨论并提出了改进的措施与意见。     

武钢320t鱼雷罐脱硫喷枪技术进步与实践

针对武钢320 t鱼雷罐脱硫喷枪实际生产中存在的问题,从喷枪耐火浇注料、枪芯结构、修补料和修补工艺3个方面介绍武钢的技术进步与实际应用效果.     

Synthetic patch for scleral tissue loss

We report a case in which traumatic scleral tissue loss was surgically treated by a synthetic patch used in neurosurgical procedures. In the present case the patch served as a permanent solution to scleral loss. The patch is available commercially and easily stored. In the light of our experience, we suggest that this patch material be considered for both urgent and semi-elective scleral patching procedures.     

Study of Stress Intensity Factor of a Cracked Steel Plate with a Single-Side CFRP Composite Patching

Composite fiber patching techniques have been considered as alternatives to traditional methods of strengthening and fatigue crack repair in steel structures. It is known that the fatigue strength of a cracked steel element depends on the stress intensity factor (SIF) at the crack tip which is a function of the stress/strain distribution of the plate. This paper presents an experimental study of tension tests of cracked steel plates repaired by single-side carbon fiber-reinforced polymer (CFRP) patching in investigating the strain distribution in the vicinity of the cracked region. The test parameters included patch length, patch width, tapered end, and axial stiffness ratio of adherend. It is shown from the test results that the single-side CFRP patching applied onto the cracked steel plate decreased the crack tip strains significantly in the patched face and increased the strains in the unpatched face. Finite-element analyses of the specimens using both the three layers model proposed by previous researchers and a modified three layers model proposed in this study were conducted to examine the strain distributions in the vicinity of the crack. In general, the strain distributions of the specimens were predicted well by the finite-element analyses using either model. The finite-element results showed that the SIF at the crack tip through the plate thickness was significantly reduced except on the unpatched side and the modified three layers model was able to capture the nonlinear SIF variation through the thickness of a cracked steel plate with single-side patching. Meanwhile, the three layers model overestimated the SIF on the patched side and underestimated the SIF on the unpatched side by about 10% on average compared to those of the modified three layers model. Based on the finite-element analysis results of the modified three layers model, it is shown that the width and the length of patching had only a marginal effect on the SIF. On the other hand, the effect of the number of layers of patching on the reduction of SIF was more pronounced.     

热修补技术的探讨与实际应用

针对某有色公司电热前床窑顶局部突然坍塌的情况,通过创新施工工艺,改进热修补措施,在热修补施工中保证了设备正常运行。其实践经验可为有色企业修复热工设备提供借鉴。     

宝钢300t钢包内衬的探索与实践

本文简介了宝钢300t钢包内衬在二期连铸生产后出现了钢包寿命缩短以及进行了改进概况,并对包龄下降及修理量增加的直接原因进行了分析;对比了铝镁碳不烧砖、含硅线石微膨胀高铝砖、SiC-腊石不烧砖等新材质的试验情况,以及在包衬修理上采用喷补技术,均取得较好的效果。     

Bridge Deck Patching Material Evaluation

Deck patching is a common practice used when bridge decks have local deterioration but do not yet warrant full replacement. Rapid setting patch materials provide a quick and economical way to patch deteriorated areas without significant lane closure time. While these materials set quickly and often achieve high early strength, their long-term performance in corrosive environments and under heavy traffic loads is sometimes poor. In addition, little guidance is provided in terms of standardized testing for these materials that addresses the key properties needed for long-term service life. This paper details a testing program that evaluates a number of deck patch materials and the development of a testing protocol for material evaluation.     

降低转炉补炉耐材消耗的实践

从改进冶炼操作工艺及优化溅渣护炉工艺提高溅渣护炉效果两方面人手。降低了钢水对炉衬(包括溅渣层)的侵蚀,提高补炉层(包括溅渣层)的抗侵蚀能力,实现了降低补炉耐材的目的,取得了明显的效果。