钢包底部用不定形耐火材料

本文报道了通过对在钢包侧壁有较好使用效果的水泥结合铝－尖晶石质浇注料的改进，开发出了可用于包底的材料。     

钢包用不定形耐火材料的湿式喷补方法

1 前言 大同特殊钢公司(氵止乂)川厂以前一直使用铝镁碳砖作为钢包内衬。但是为了减少砌炉工时和降低耐火材料成本,从1995年开始引入了利用不定形耐火材料的浇注施工。然而,浇注施工存在着如下问题:①需要养生时间;②需要形状各异的模框;③增补施工时不需模框而要部分拆开等。作为其解决方法,作者这次尝试应用不需模框的湿式喷补方法,开发了与浇注料具有同等质量的材料。本文就钢包湿式喷补料的开发     

钢包底部不定形耐火材料的开发

1 前言 近年来,炼钢用钢包内衬不定形技术经过在钢包壁使用之后,其技术已确立,目前正被广泛应用于钢包的渣线部和底部。渣线部和底部对不定形耐火材料应具备的条件要求趋于重视耐侵蚀性和抗渣性。但是,对于钢包底部不定形耐火材料,除了要考虑耐侵蚀性和抗渣浸     

钢包用高耐用性铝—尖晶石超细粉不定形耐火材料的开发

1 前言 以往钢包侧壁用不定形耐火材料是以铝-尖晶石质为主,而近年来,发展为以铝-镁质为主,这种铝-镁质材料由于二次尖晶石的生成以及通过蠕变而使组织致密化,因而是一种抗侵蚀性、抗渣渗透性均较好的材质,但由于其膨胀特性,容易发生因内部缺陷引起的剥落。     

不定形耐火材料的未来

文中阐述了在钢包包底和包壁外使用不定形材料具有良好的性能,但不定形料的浇注成型技术还需进一步的改进,同时还要降低成本,随着时代的发展,出现了自动化浇注装置。也出现了喷射混凝土维修方法,现场浇注射工不仅可用模板,还出现了无模施工。总之,钢包衬用不定形耐火材料有能力与砖衬结构进行竞争,其在未来具有广阔的发展前景。     

川崎钢铁公司水岛厂钢包用不定形耐火材料技术的进展

通过用后试样的岩相分析研究表明,钢包用铝尖晶石浇注料内衬的损毁是结构剥落。采取钢包加盖、控制浇注后的养护温度和延长座砖寿命等措施,使钢包寿命达到300次,比改进前提高了1.5倍。     

钢铁工业用不定形耐火材料

由于省力、改善筑炉作业环境、降低筑炉费用,所以日本钢铁工业用不定形耐火材料比率不断增大,约占耐火材料总量的60％。不定形耐火材料适用的窑炉,开始主要是高炉出铁沟、吹氧管、中间包等,后来,钢包、补炉用不定形耐火材料大幅度增加。不定形化方面,在世界范围内,日本处于领先地位,而且将向更大的使用范围进行开发。本文将以钢包不定形以及各类窑炉的修补技术为例,阐述不定形耐火材料的发展趋势。     

含SiC不定形耐火材料

1 前言 碳化硅具有热传导高、热膨胀低、与炉渣难以反应等许多通常氧化物原料所没有的特性。为此,从很早开始就被作为炉渣反应和高温剥落严重的部位的耐火材料的主要原料使用。在不定形耐火材料中也是一样,从以捣打料和可塑料为主的时代到以低水泥浇注料为主的现在,碳化硅的重要性没有变化。但是碳化硅也有几个缺点:(1)在某种气氛下化学性质     

New Formulations of Fused Periclase-Based Refractory Materials for the Lining of Steel Ladles

New formulations of fused periclase-based carbon-containing refractory materials for differentiated use in the lining of steel ladles (bottom, slag zone, and walls) are proposed. The use of new refractory materials made it possible to improve the lining durability from 80 to 100 heats.     

A Technology for Production of Composite Refractory Materials for the Lining of Steel Ladles

Results of the testing of new refractory materials for the lining of steel ladles are reported. Refractories based on coarsely crystalline periclase (98% MgO) for the slag zone with an endurance of 55 – 60 heats and wear rate of 2.3 mm/heat were tested. For the bottom lining of the steel ladle, alumina-periclase-carbon refractories using fused or sintered alumomagnesian spinels are developed. Performance characteristics of the newly developed refractory materials are discussed.__________Translated from Novye Ogneupory, No. 1, pp. 6 – 9, January, 2005.     

中间包内衬用整体耐火喷涂料

考虑用户的要求和冶金设备内衬的使用情况，为了发展和使用不定形整体耐火喷涂料，对叶尔萨夫斯克矿的烧结料的适用性进行了评价。     

Optimizing the Conditions for Pre-Start Heating of the Refractory Lining of Steel-Teeming Ladles

An energy-saving dry-out technology for the refractory lining of steel-teeming ladles with a thermal efficiency of 45 – 50% is developed. This technology provides high heat resistance of the lining to meet stringent requirements placed on the dry-out, preheating, and temperature regime of lined vessels. Positive results for the technology tested under industrial conditions are reported.     

The Monolithic Refractory Lining for Furnaces Fired by Wood Fuel

Service conditions of the refractory lining of the furnaces of drying drums fired by wood fuel (polishing dust for wood fiber boards) are analyzed. Combustion of this fuel produces 9% of solid-state ash containing low-melting compounds capable of infiltrating into the chamotte refractory. Because of the frequent thermal shocks associated with heat-cool operating regimes and the attack by molten ash slag, the chamotte lining undergoes degradation. To improve the operating conditions and extend the service life of the lining, the use of a castable monolithic material with superior resistance to high temperature and corrosion is proposed.     

Basic-Composition Mixture for the Consumable Lining of Intermediate Ladles

Thermomechanical and chemical-ceramic properties of the PTMS basic-composition mixture for the consumable refractory lining of intermediate ladles in service at the Kombinat Magnezit Joint-Stock Co. are considered and some details of the fabrication technique are discussed. Results for the mixture tested for performance at various metallurgical plants are given. Advantages of the mixture for practical application, its microstructural characteristics in pre- and post-service conditions, and the wear behavior are discussed.     

钢包用尖晶石-MgO浇注料的研究

随着钢包中二次精炼的不断采用，耐火材料上的负荷也在增加，其环境比以前更恶劣。基于此因，需要开发高性能的材料以延长生产时间，且耐高温及抗高C／S渣。通过采用粗尖晶石，新开发的尖晶石-MgO浇注料具有高抗侵蚀性和渗透性，比普通Al2O3-MgO浇注料性能要好。     

Refractory Lining for Alumina Electrolytic Cells

This paper provides the specifications of a refractory lining for alumina electrolytic cells capable of ensuring good resistance to corrosion by the cell chemicals, while maintaining desirable thermal characteristics during service.
Several refractory materials were tested in the Alcan's standard electrolysis bath test. Also, using Alcan's standard procedures, different insulating refractory products were tested for their gain in thermal conductivity after compression.     

Granite市钢厂钢包的改进

本文介绍了Granite市钢厂钢包耐火材料内衬近几年的一系列改进，通过砖形、成份、内衬设计、钢液渗透的解决等诸多方面的探讨，总结出了延长钢包使用寿命的一些方法，不仅降低了耐材成本，同时也降低了换衬次数，减少了劳动力，提高了钢包的利用率。