Fundamental of Slag Design for Iron and Steel Refining
- 作者：Y.D. YangI.D. SommervilleA. McLean
- 会议时间：2014-05-01
- 关键词：Slag capacities ; dephosphorization ; desulphurization ; nitrogen ; water vapour ; optical basicity ; oxide melt ; steelmaking ; custom-designed slags
- 作者单位：Department of Materials Science and Engineering University of Toronto
- 母体文献：第十八届(2014年)全国炼钢学术会议论文集
- 会议名称：第十八届(2014年)全国炼钢学术会议
- 会议地点：西安
- 主办单位：中国金属学会
- 语种：chi
摘要
In this paper,the fundamental aspect of oxide melts pertaining to the removal of impurities from hot metal and liquid steel are discussed with particular emphasis on the concepts of slag basicity and slag capacity.The capacities of various species in molten slags are evaluated using the traditional method of empirical ratios to describe slag basicity as well as the relatively new concept of optical basicity.Examples are provided to illustrate how these concepts can be used to control the behaviour of alkalies in the blast furnace as well as phosphorus,sulphur,water vapour and nitrogen during steelmaking.It is shown that optical basicity avoids the confusion that can arise from the use of empirical basicity ratios,particularly with regard to the effect of magnesia,and in addition,facilitates the design of slags with appropriate characteristics and properties for the treatment of hot metal and liquid steel.