LF精炼钢包渣线用含铬铝镁浇注料的研制

以特级矾土、电熔镁砂、铬刚玉为主要原料制备了LF精炼钢包渣线用含铬尖晶石质浇注料,并在抗渣蚀性及抗热震性方面同现场使用的普通铝镁浇注料进行了对比。结果表明:与现场使用的铝镁浇注料相比,新研制的含铬尖晶石浇注料具有更好的抗热震性及抗渣蚀性,在济钢55t钢包上使用寿命达到79炉次。     

低水泥铝镁质浇注料的研制与应用

以刚玉、α-AlO微粉和镁砂为主要原科，研究了材料组成对低水泥铝镁质浇注料流动性、可施工时间、烘烤抗爆裂能力、热处理后的线变化率及强度、抗渣性和热震稳定性的影响。对浇注料的组成进行了优化，开发了由不同刚玉骨科组成的铝镁浇注料。在大型连铸钢包、大型高炉脱硅倾注沟中试用，获得了较好的使用效果。本文还对浇注料内衬的损坏特征进行了分析。     

添加尖晶石超细粉提高铝尖晶石浇注料的抗侵蚀性

为提高钢包侧壁用浇注料的抗侵蚀性和抗潭渗透性,在对铝尖晶石质浇注料和铝镁质浇注料进行比较之后,研究了在铝尖晶石质浇注料中添加尖晶石超细粉的效果,调查了不同添加量所产生的影响,结果发现,尖晶石超细粉添加量为c%（质量）的铝尖晶石质浇注料不仅尖晶石在基质中均匀分散,而且组织致密,其抗侵蚀性和抗渣渗透性都比铝镁质浇注料的高,在实炉使用的结果表明,耐用性可提高大约３０％。     

钢包包衬用铝镁质浇注预制块的开发与使用

随着冶金技术的发展 ,钢包使用条件日益苛刻。钢水需进行精炼处理 ,在钢包中的停留时间延长 ,相应地 ,对钢包用耐火材料的要求越来越高。近年来 ,钢包内衬向无炭化方向发展。无炭内衬有整体浇注料、机压砖和浇注预制块。整体浇注料在使用寿命上有一定优势 ,但存在的不足之处限制了它的作用 ,比如浇注时对外界温度、加水量、养护温度、烘烤制度等方面都有严格的要求。现在很多钢厂使用铝镁质、铝尖晶石质机压砖和浇注预制块 ,其砌筑方法及烘烤制度与铝镁炭砖相同 ,钢厂容易接受。本工作研究了钢包包衬用浇注预制块的开发和使用。1　试验试验…     

致密质钢包内衬浇注料

通过改变浇注料的粒度分布或减少混合物的加水量，研究了其对铝镁质浇注料致密化的影响。这两种致密方法对提高常规性能和抗渣性都有影响。在钢包的抗冲击区的座砖处正在使用这些新的致密质浇注料，从而通过其『尤良的性能来提高钢包的使用寿命：     

钢包用浇注料轻量化的研究

在炼钢过程中,抑制炉皮散热和蓄积到耐火材料中的热损失,对抑制钢水温度下降非常有效。对于钢包内衬用耐火材料的轻量化问题,本研究在铝镁质浇注料中采用空心氧化铝骨料,并对此进行了评价,寻找适当的添加量和粒度。     

加不锈钢纤维的铝镁质浇注料的耐磨性

1 前言 近年来,钢包底、中间包壁、喷射用喷枪管和RH浸渍管等开始使用添加不锈钢纤维的铝镁质浇注料。一般而言,不锈钢纤维可防止耐火浇注料中龟裂的扩展和剥落,提高耐磨性和耐热震性。然而,不锈钢纤维的加入对浇注料的流动性产生不利影响。     

矾土基高铝—尖晶石质钢包浇注料的研制和应用

以特级铝矾土、矾土基尖品石和烧结镁砂等为主要原料，采用超细粉凝聚结合，并对基质的化学矿物组成进行优化，开发出了矾土基高铝—尖晶石钢包浇注料。其烘烤特性良好，施工性能、物理性能及抗渣性比传统水玻璃结合的铝镁浇注料有显著提高。经在全国十多家钢厂的中小型钢包上使用，在绝大多数情况下其寿命比传统水玻璃结合的铝镁浇注料或铝镁炭发砖提高了１００％以上。     

铝镁浇注料钢包整体浇注技术的工艺优化

钢包用铝镁浇注料一般是使用高模数的水玻璃作为结合剂,与特级或一级高铝矾土熟料、镁砂细粉及少量的促凝剂按一定比例配制而成的一种不定形耐火材料.该产品于20世纪80年代初问世,主要应用于中小钢包等热工设备上,其最大的优点是具有很好的抗渣性,作用机理是铝镁浇注料中的镁砂细粉与高铝钒土熟料细粉在高温作用下形成新的矿物--铝镁尖晶石,由于铝镁尖晶石具有硬度大,化学性能稳定,熔点高等良好的性质,在高温作用下对各种熔体侵蚀作用的抵抗性非常强,从而极大地改善了钢包用铝镁浇注料的高温性能.     

用后钢包透气砖在铝镁质浇注料中的应用研究

从钢包废透气砖中获取二次颗粒原料,并用于钢包包底铝镁质浇注料生产中,以部分替代高铝骨料。试验结果表明:其产品满足检测标准和使用要求,综合使用性能优于现有棕刚玉骨料产品,具有明显经济效益和社会效益。     

高档钢包浇注料的开发与应用

研究了刚玉的种类、粒度及加入量,以及结合剂的种类及加入量对浇注料性能的影响。以刚玉、矾土熟料为骨料,高档电熔镁砂粉、刚玉粉为基质,开发出了更加适合国情,价廉物美的高档钢包浇注料。该产品在马钢三炼钢７０ｔ钢包上使用后证明,其抗剥落性好,蚀损率小,且包壁整体光滑,达到了上下同步蚀损的理想效果。     

Alumina-spinel castable for steel ladles: An overview

Alumina-spinel castable has excellent refractory properties, including high volume and thermal stability, good hot strength, and excellent resistance against corrosion, erosion, and thermal spalling. Excellent refractory properties have made it a preferred lining for steel ladles, reducing the erosion and corrosion of molten metal and slag and improving the ladle life and efficiency for decades. These castables are also significant for the replacement of chrome-bearing refractories that cause several health hazards. The current review paper covers preformed and in situ spinel containing alumina castables. It focuses on the importance of these castables in the sidewall and bottom portion of the steel ladle in detail, the effect of spinel and MgO content, and the factors affecting castable properties. The review also covers the final properties of castable and the application areas of alumina-spinel castable in steel ladle, purging plugs, and RH-degasser.     

"In-situ Recycling" :Monolithic Ladle Repair with Shotcreting

The service life of refractories in ladle walls is limited by corrosion,abrasion,thermal shock and structural spalling mechanisms. When the ladle is lined with bricks they typically need to be completely removed after a certain number of heats to be replaced by new bricks of the same size as the original bricks. Not so for monolithic ladle linings. At the end of their service life the remains of the castable can almost completely be recycled as they can in fact stay in place. Only the worn-out part of the lining has to be replaced by a new castable. 20%-50% of the initial ladle lining can be recycled "insitu". The installation can efficiently be done by shotcreting technics. But it requires a castable that resists slag penetration very well. Castables based on a calcium magnesium aluminate bond provide the required penetration resistance. Pumping and shotcreting is very well adapted for repairs of blast furnace shafts,torpedo cars,hot metal and steel ladle linings[1]. However,very little is published about how a good pumping and shotcreting performance can be achieved when the installation has to be done under extreme weather conditions. At high ambient temperature the challenge is to ensure a good pumping result without early castable stiffening. Blockage of the pump would be the consequence. At low ambient temperature the difficulty is to de-activate the highly efficient deflocculant fast enough with a gelling agent added intothe wet mix at the nozzle to prevent the gunned material slipping off the wall. This paper studies strategies how to achieve good installed properties even at extreme ambient temperatures. The interactions between deflocculants,retarders,gelling agents,and calcium magnesium aluminate binder as a function of temperature are studied for an alumina- spinel ladle castable. Beside a new gelling agent for this castable type also a special stabilizer to reduce the temperature sensitivity has been investigated. It will be highlighted how the use of the new calcium magnesium aluminate binder in ladle castables and shotcretes maximises their service life and minimises material consumption.     

几种钢包用含碳耐火材料对IF钢增碳的比较

通过感应炉试验分析了钢包渣线用3种碳含量不同的镁碳砖(C的质量分数分别为8.3%、15.5%和17.9%),钢包底用蜡石-碳化硅砖(C的质量分数为3.71%)以及实验室开发的MgO-Al2O3-SiC质钢包渣线浇注料(C的质量分数为4.07%)对IF钢增碳的影响,并对其增碳的机理进行了初步分析讨论。试验结果表明:渣线镁碳砖的碳含量越高,对IF钢造成的增碳量越大;包底蜡石-碳化硅砖对IF钢水的增碳量达到渣线镁碳砖的7.73倍;MgO-Al2O3-SiC质浇注料也对IF钢产生明显的增碳效果,不宜用作冶炼超低碳钢的钢包渣线材料。     

LF精炼钢包用铝尖晶石浇注料的研制与应用

通过调整富铝尖晶石及镁砂的粒度组成和添加量,优化浇注料的基质组成,使研制的富铝尖晶石浇注料具有优良的抗渣侵蚀性和抗剥落性。该浇注料在首钢第三炼钢厂９０ｔ ＬＦ炉包壁使用,取得了较好的使用效果。     

耐火浇注料在硅铁电炉铁水包上的应用

介绍了硅铁铁水包内衬原用耐火砖衬的结构及使用中存在的主要问题,论述了耐火浇注料的研制过程及浇注料包衬的施工工艺、结构和使用效果。     

氧化镁—锆英石钢包浇注料的研制

以电熔镁砂和锆英石为原料,研制了氧化镁-锆英石钢包浇注料,并研究了锆英石加入量对浇注料性能的影响及热处理温度对浇注料强度的影响,同时对其机理进行了探讨.     

Steel ladle well block post mortem analysis

Spinel-containing castables are widely used as steel ladle refractory lining, due to their outstanding basic slag (calcium aluminate based) corrosion resistance. In order to understand their corrosion mechanism, a post mortem evaluation of a steel ladle well-block castable was carried out. The interaction among the refractory castable, slag and molten steel was mainly evaluated by light optical and scanning electron microscopy using SEM multielement mapping. The results indicated that an equilibrium state was attained, leading to the formation of a densified barrier that protected the original castable from corrosion located at the deepest regions, regarding the metal flow. Each one of these layers was evaluated, underscoring the damage that the refractory is liable to during application and also the possibilities of steel contamination, due to castable wear, and reoxidation. The experimental results were compatible with the literature, pointing out how corrosion takes place and the possibilities to reduce its negative effect.     

钢包渣线用MgO-尖晶石-Cr_2O_3浇注料的研制与应用

以镁砂、电熔白刚玉、矾土熟料、尖晶石等为主要原料,研究了Ｃｒ２Ｏ３对ＭｇＯ尖晶石浇注料常温物理性能、荷重软化温度、抗渣和抗热震性的影响,开发出了ＭｇＯ尖晶石Ｃｒ２Ｏ３浇注料。在某钢厂９０ｔＲＨ精炼钢包渣线部位使用,平均一次性寿命达９６．５次