长钢3号高炉喷补造衬实践

长钢3号高炉通过合理地选择喷补料，合理组织人员，根据工艺要求严格控制喷补的工艺参数，采用遥控喷补技术对3号高炉进行短时间造衬，使高炉在较短时间内恢复了正常炉型，高炉冶炼得到了恢复和进一步强化。     

高炉内衬喷补技术在鞍钢的应用

鞍钢炼铁厂现有１０座高炉。自１９９３年起,采用炉衬遥控喷补技术先后对９号、７号、１１号、１０号、６号、２号高炉进行了炉衬喷补,对快速修补破损的炉衬,恢复完整的操作炉形起到了巨大的作用。介绍了鞍钢炼铁厂应用炉衬遥控喷补技术的情况。     

废镁铬砖在镁质喷补料中的应用研究

利用化学组成（质量分数）：MgO 66．75％，CaO 1．25％，SiO2 1．51％，Fe2O3 6．82％，Cr2O3 19．61％的宝钢RH废镁铬砖生产了镁质喷补料。结果表明：用0．2％（质量分数）的六偏磷酸钠为分散剂时，50％（固相体积分数）的废镁铬悬浮液最稳定，流动性最好，废镁铬固体含量50％可以视为该悬浮体的临界值。废镁铬料添加量27％（质量分数）的试样RP3的性能指标均达到了纯镁质喷补料RP1和RP2的各项指标，并在现场应用中取得了令人满意的效果。     

首钢高炉喷涂造衬实践

首钢炼铁厂对高炉进行的12次喷涂实践表明,遥控喷涂不但可以延长高炉炉衬寿命,而且还可以使高炉保持好的生产指标。为确保喷涂成功,喷涂时应注意以下几个问题:高炉炉墙的清洁,喷涂料的使用量,喷涂方式、耐火材料、喷涂设备和工艺参数的选择。     

宝钢2BF炉身喷涂实践及效果

简述了宝钢2BF炉身喷涂部位及喷涂厚度,并详细分析了喷涂前后生产的多项经济技术指标。2BF此次炉身喷涂消除了因焊缝开裂造成的休减风,降低了崩滑料次数,明显降低了喷涂部位对应的21~54段热负荷,煤气利用率提高,显著改善了高炉顺行状态。高炉顺行整体改善带来了利用系数的增加,总焦比降低,煤比上升,铁水质量大幅度提高。     

气体组成对高炉喷补料抗CO侵蚀能力的影响

通过在反应气中加入氢气,研究此种气体组成条件下,喷补料抗CO侵蚀能力.同时,探讨一种用混合气体来检测耐火材料抗CO侵蚀能力的标准.结果表明:添加氢气促进了CO对喷补料的侵蚀;在95%CO+5%H₂气氛中反应24h与试样在纯CO气氛中反应200h取得相的结果;可以用95%CO+5%H₂代替纯CO气氛,进行耐火材料抗CO侵蚀能力的检测.     

高炉内衬综合维修技术

叙述了高钢１号高炉在炉役后期进行的热喷补、硬质料压入和出铁口维修等综合技术及其应用效果。同时介绍了自行研制的喷补机和喷补料的情况。     

高炉炉身喷补技术的应用

中小型高炉炉身内衬喷补是采用不定型耐火材料以喷射法修复炉身的一项新技术.其综合效果优于用粘土砖修补内衬,可替代高炉中小修作维修的作用.     

可塑料喷涂新工艺在宝钢的应用

可塑料喷涂是一种新型的可塑料施工工艺,国内尚未应用。简要介绍了可塑料喷涂工艺的优点以及在宝钢高线加热炉、均热炉上的实际应用效果。     

喷补造衬技术在包钢3#高炉上的应用

通过合理地选择喷补料，采用遥控喷补技术对包钢3^#高炉进行短时间造衬，严格控制喷补的工艺参数，使高炉在较短时间内恢复了正常炉型，高炉冶炼得到了恢复和进一步强化。     

Interaction between molten steel and different kinds of MgO based tundish linings

Abstract

Interactions between the molten steel and the refractory linings are of fundamental importance for the steelmaking industry. During the casting process, the steel cleanliness can be made worse because of the reoxidation of the molten steel in contact with the atmosphere and/or other sources of oxygen (refractories, top slag, etc.). In the industrial trial periods, four tundish refractory linings (preformed boards, two kinds of gunning materials and dry vibrating material, all MgO based refractories) were used in order to evaluate the interactions between the refractories and the molten steel. Owing to the small dimension of the tundish (5 ton) used in the continuous casting at Villares Metals SA, after casting, the chilled steel was cut in order to show, in a single section, the stopper, submerged entry nozzle, MgO ramming and the working refractory lining. Cross-sections of samples from the steel/refractory interface were investigated by electron probe microanalysis (EPMA). Four major aspects were observed at the steel/refractory interface: steel infiltration into the tundish refractory lining, mainly in the gunning materials; a steel oxidised layer formed at the steel/refractory lining interface; formation of a spinel layer between steel and tundish working refractory lining; and many particles were found in the steel phase, near to the steel/refractory interface, being a potential source of non-metallic inclusions.     

新型定量式喷补机的设计与应用

针对电炉炉墙耐材喷补机出料阻塞及无法定量送料等问题,自行研究设计了新型定量式喷补机,投资少、应用效果良好,取得了良好的经济效益。     

超高流动性改性镁渣基充填材料的性能

针对超远距离输送过程中,特殊管路布置等充填技术中堵管、爆管风险大,管道磨损严重等问题,采用改性镁渣（MMS）和粉煤灰（FA）在不同配比下制备超高流动性新型膏体充填材料（UH-MFPB）,探究其早期强度、流动性以及流变特性,并建立流动性和流变参数的相关关系。研究结果表明:（1）UH-MFPB样品的单轴抗压强度随FA含量增加呈先增大后减小的趋势。当FA质量分数为20%时,样品的抗压强度最大,养护28 d可达到6.759 MPa,后期强度持续增加;（2）新鲜UH-MFPB料浆的坍落度为25.6～29.2 cm,扩展度为61～93.1 cm,具有很好的流动性;（3）新鲜UH-MFPB料浆的流变特性符合Herschel?Bulkley模型,流变参数（屈服应力、塑性黏度和触变性）随FA含量的增大而减小,且FA质量分数达到20%时,料浆出现剪切增稠的现象;（4）新鲜UH-MFPB料浆的流动性和流变参数满足二次多项式关系,呈现出负相关性。      

鱼雷罐喷补料的研制开发与应用

以致密高铝矾土、碳化硅、白刚玉细粉、SiO2微粉、Al2O3微粉和纯铝酸钙水泥等为原料,开发了鱼雷罐喷补料,研究了微粉加入量对喷补料性能的影响,比较了氯化钙、聚合氯化铝、三乙醇胺、铝酸钠的促凝效果.结果表明,加入7％的SiO2微粉和3％的Al2O3微粉,对提高施工性能和使用性能有利;以三乙醇胺为促凝剂有较好的促凝效果.开发的喷补料在鱼雷罐大修时一次喷补,可提高鱼雷罐使用寿命200次以上,喷补工艺简单、施工性能好,吨铁降成本约0.3元.     

无碳新技术钢包及在济钢的应用

为满足品种钢开发要求,降低耐材消耗,济钢采用了无碳新技术钢包,即采用无碳预制件砌筑包壁,包底整体浇注打结,运行过程中进行4～6次喷补小修。新技术喷补料修砌喷补后,在高温下与包壁预制件变质层的矿物相进行互相渗透、互相反应,生成具有优良性能的反应层,从而把使用过的变质层与新喷补层牢固地粘接在一起,形成的衬体达到与原有预制件相同的使用效果,抗侵蚀耐冲刷,平均寿命达到175炉以上。     

Erosive Wear of Hydraulic Concrete with Low Steel Fiber Content

The paper reports on the erosion resistance of two types of hydraulic concrete, a plain concrete and a concrete reinforced with a low volume of steel fibers. Flow velocities ranged up to 230?m/s for water flow and up to 160?m/s for particle-water flow. Flow angles were 15° and 90°, respectively. A general relationship could be found between erosion rate, ER, and process parameters: ER∝vFn?f(θ), with vF being the flow velocity, and θ being the flow angle. The velocity exponent n varied between 2.1 and 2.3 for water flow and between 2 and 2.9 for particle-water flow. In general, erosion rate decreased if the concrete was reinforced. However, the influence of the fiber reinforcement was more pronounced for the shallow flow angle. This is explained by the formation of a “shadow zone” behind the fibers in the case of shallow flow angle.     

Cohesive Sediment Characterization by Combined Sedimentation and Rheological Measurements

A laboratory characterization of cohesive sediment has been carried out in which data obtained from standard sedimentation and rheological measurements were combined in a determination of the critical solid concentration for the detection of elasticity in a weakly cohesive suspension. The corresponding storage modulus and shear stress are very critical in any in situ rheometry of sediments, especially in the study of mud-water surface erosion in a flume. Sedimentation results showed that particle size distribution rather than surface treatment controlled the rheological behavior of the suspension while the critical solid concentration for the appearance of three-dimensional space-filling network, showing some measurable elasticity in the suspension, occurred in the region of 0.015. This parallel between the consolidation behavior and shear rheology development for the flocculating system has been established. This technique could be an adjunct to the laboratory characterization of cohesive sediments for the estimation of critical shear stress for surface erosion, especially in a typical flume experiment under water wave pressure.     

高炉喷补后的炉况恢复

高炉炉衬喷补修复技术是近年来发展起来的具有实用价值的新技术。根据首钢已进行的30余次喷补后炉况恢复经验，对炉况一次快速恢复成功，喷涂后反弹料的造渣、出渣、出铁等问题进行了研讨。高炉炉衬喷补修复技术的关键是控制好整个恢复期的炉温变化和配合好炉内外工作。     

Differential LHRH secretion, dye coupling, and protein expression in two morphologically distinct cell types identified in GT1-7 cultures

With a new ektacytometry, we studied the relation between the microstructure of red blood cell (RBC) membrane and the rheological properties of RBCs in a shear flow field of low viscosity. The main contributions of this paper are as follows: 1. The hemorheological meanings of the orientation index (DI)or and the small deformation index (DI)d were explored. (DI)or is an overall rheological index depending on the deformability and morphology of RBCs. The better the physiological shape of RBCs is maintained, the greater the (DI)or is. (DI)d can be used to describe the lipid fluidity of RBC membrane. Such an explanation for the meaning of (DI)d has been forcefully supported by our experiments using electron spin resonance (ESR) and fluorescence polarization. 2. The influence of wheat germ agglutinin (WGA) of different concentrations on the lipid fluidity of membrane is different from that of concanavalin A (ConA). The lipid fluidity of membrane changes with WGA concentration treating RBCs and there is a maximum value for the membrane fluidity at a specific concentration of WGA. However, the deformability of membrane described by the integrate deformation index (IDI) monotonically decreased with the increase in WGA concentration treating RBCs. 3. It is concluded that the increase in the lipid fluidity of red cell membrane is not necessarily associated with the improvement of RBC deformability.     

RH真空精炼炉浸渍管用热喷补料的研制

以ＭｇＯ〉９５％的电熔镁砂和ＭｇＯ〉９３％的烧结镁砂为主原料，膨润土、ＣａＯ等为辅料，以复合磷酸盐和硅酸盐为粘结剂，再添加些外加物，如ＳｉＯ２、Ａｌ２Ｏ３微粉，配制的ＲＨ真空精炼炉浸渍管用热喷补料，各项性能指标和使用效果均达到国外同类产品的先进水平。