Study on lime dissolution in converter slag
In order to obtain reliable information of lime dissolution under forced convection, the commonly used rotating rod method was examined. Both CFD calculation and cold model experiments showed evidently that the mass transfer due to radial velocity introduced by forced convection was zero if the rod was centrally placed in a cylindrical container. This finding was in accordance with the criteria put forward by the original work that the method could only be applicable when a thin disk (instead of rod) with big diameter and big liquid bath were used. A new experimental design was therefore developed. A cube was placed in the crucible and stirred by Mo rod along with slag. The whole system, lime and slag, could be quenched in order to maintain the state of the system at high temperature. A linear relationship between normalized length and time was obtained for lime dissolution. Different lime samples showed big difference in dissolution rate. It was found that the main mechanism of CaO dissolution in slag was due to the removal of 2CaO·SiO2 layer. This removal process was evidentially seen in the vicinity of the lime cube in the quenched slag phase.
lime dissolution slag stirring
Tengfei Deng Du Sichen
Department of Materials Science and Engineering, Royal Institute of Technology, SE-10044 Stockholm, Sweden
国际会议
Ninth International Conference on Molten Slags,Fluxes and Salts(第九届国际熔渣、溶剂与熔盐学术会议 MOLTEN12)
北京
英文
1-13
2012-05-27（万方平台首次上网日期，不代表论文的发表时间）