炼钢用耐火材料技术的发展方向

本文主要从不定形耐火材料和功能性耐火材料两个方面论述了炼钢用耐火材料技术的发展方向。     

日本炼钢技术的发展及耐火材料状况

1.前言 日本耐火材料工业随着炼钢工业的发展取得了令人满意的进展。但近十年来却面临着十分困难的局面,即炼钢、炼铁技术进步带来了耐火材料单耗和单位成本持继下降。耐火材料产量的不断减少,给耐火材料制造商的赢利带来了严重的问题。为了生存,他们不得不极力提高劳动生产率。     

炼钢用耐火材料的基础评价技术

本文站在与以前的评价技术不同的角度,通过与以往的评价技术并用,以普通的装置,详细叙述了对炼钢用耐火材料的基础价技术。     

炼钢用耐火材料的发展趋势

1 前言 在炼钢用耐火材料开发方面正取得重大进展。这些进展包括改进材料性能、钢包衬的设计、砌衬和热补方法等。改进性能的主要理由是: 1)为了获得较纯净的钢,在高温下不仅铁水预处理而且炉外精炼也需要有较长的处理时间; 2)竞争压力,迫使钢厂通过提高耐火材料衬的使用寿命来降低成本;     

耐火材料的研究动向——以耐火材料的熔损为中心

本文概述了有关炉渣，金属对耐火材料的熔损机理及其评价方法的最新研究动态。     

日本炼钢用耐火材料

序言 近十年来炼钢技术在世界范围内取得了显著的进步,在这些进步中耐火材料工业的支撑起了重要的作用。过去十年中日本的粗钢产量保持每年约1亿t的水平。在同一时期内由于耐火材料的单耗由每吨钢的14.0kg降至11.3kg,所以耐火材料的产量降低了27％     

炼钢用铝镁碳和镁铝碳耐火材料的研究

论述了少量MgO-Al2O3尖晶石相的存在能改进Al2O3-MgO-C(AMC)和MgO-Al2O3-C(MAC)耐火材料的性能,而且对其强度没有任何负作用。     

Dissolution Kinetics of Magnesitic-Dolomite and Magnesite-Chrome Refractories in Secondary Steelmaking Slags

Dissolution kinetics of magnesitic-dolomite and magnesite-chrome refractories in secondary steelmaking slags was studied by means of the rotating cylinder method under forced convection. Materials investigated include four magnesitic-dolomite samples(MgO content 40% to 93%)and two magnesite-chrome samples (co-clinkered and semi-rebonded).Synthetic slags simulative of VOD and AOD slags with varying basicity (0.6-2.68) are used.The experiments are carried out in Ar atmosphere at different temperatures (1 600 ℃-1 750 ℃) and revolution speeds (200 r·min-1to 500 r·min-1).The microstructure of specimens (before and after slag tests) are studied by optical microscopy, SEM and EPMA. Based on our experimental results the mechanism and kinetics of the dissolution process are discussed.     

不定形耐火材料的研究进展

介绍了不定形耐火材料的研究与应用变化过程，对配方的改进及结合剂的使用进行了探讨，指明了浇注料的应用与研究方向。     

Thoughts on Strategic Development of China‘s Refractories Industry

For China‘s refractories industry, the first two decades in the new century would be a period of structural optinization with reorganization of refractories enterprises, reconstruction of manufacturing plants and restructuring of product varieties. An important strategic measure should be to develop high quality synthetic raw materials and high performance functional products mainly based on our rich natural resources to cope with new demands of advanced high temperature technologies.     

联合制碱法技术进展

简要介绍了联碱法的发展历史,并从原料路线、废弃物排放、能耗和产量4个方面与氨碱法作了比较。对联碱发展过程中的主要技术进步项目作了介绍。     

Development of Refractories for Continuous Casting

The paper introduces refractories for continuous casting,especially,refractories for continuous casting for clean steel in baosteel.Developing direction of refractoies for continuous casting has been pointed out to satisfy the new metallurgical operating practice.     

Review of Basic Refractories and Development History of Sinosteel Luonai Basic Refractories

The importance of basic refractories during the development of steel,non-ferrous and cement industries was introduced.The process of magnesia-chrome bricks was ...     

Preparation of Light-weight Spinel Refractories by Foaming-gel Process

Light-weight magnesium -aluminate spinel materi- als were prepared by foaming-gel process with polyalumi- nium chloride （PAC） as gel. Effect of solid loading in initial slurry on microstructure, porosity, pore size distri- bution, thermal conductivity and mechanical properties was investigated. The results show that the bulk density of the light-weight magnesium -aluminate spinel mate- rials is in the range of O. 7 1.2 g cm-3 ; pore size distribution curves show single-peak characteristics and the mean pore size is in the range of 30. 83 - 61.37 μm ; with the increase of solid loading, the linear shrinkage of the green body during firing and the permanent change in dimensions on heating at l 600 ℃ for 3 h de- crease, but the bulk density increases, the mechanical properties increase obviously; the maximum compressive strength and bending strength reach 35. 25 MPa and 9. 92 MPa, respectively, while the bulk density is 1. 16 g · cm ; and the thermal conductivity at 1 000 ℃ tea- ches 0. 371 W · m-1 . K-1 while the bulk density is O. 7 -3 g · cm     

Key Refractories Application in Hazelett Strip-casting Process

As one of the most mature aluminum sheet continuous strip-casting processes,Hazelett strip-casting has been successfully industrially applied.This work introduced the key refractory materials for Hazelett strip-casting process,including large-scaled Al_2O_3 ceramic foam filters,wide-feed head boxes,monolithic strip-stream nozzles,and coatings on twin-belt.Besides,the localization of the refractory materials was discussed.     

水泥回转窑用碱性炉材的技术进步

含铬耐火材料和废弃物燃料的环境问题，促进了水泥回转窑用碱性炉材的开发。由于氧化镁系炉材的耐热性和耐腐蚀性较高，一般用于过渡带。白云石系炉材的包覆性较好，多用于煅烧带。添加氧化锆及锆酸钙的尖晶石，其膨胀性低，有助于提高碱性耐火砖的抗冲击性和降低热传导率。镁尖晶石良好的微观组织不仅对改善耐腐蚀性是有效的，而且对包覆性也是很有效的。碱性炉材的发展依赖于合成原料，主要的研究课题就是降低原料的价格。