|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||9th International Symposium on High Temperature Metallurgical Processing
||Preparation for High Activity Lime and Its Effect on Desulfurization of Hot Metal Pretreatment
||Su-ju Hao, Jiann-Yang Hwang, Wu-feng Jiang, Yu-zhu Zhang
|On-Site Speaker (Planned)
Lime was made by the calcination of limestone in a vacuum-high pressure electric furnace. The lime mineralogical phases and micro-morphologies were characterized by X-ray diffraction (XRD) and field emission scanning electron microscopy (FE-SEM). The lime activity degree was determined by acid-base titration and the lime pore distribution was measured by mercury intrusion porosimetry (MIP). The results show that both the pore size and the activity of lime increased with the increase of calcination pressure. When the calcination pressure is 0.4 MPa, the pore size of lime is about 4 ým and the activity is 437 ml. The desulphurization experiments were carried out in the induction melting furnace using lime with different activity and microstructure as desulfurizer. The results show that the desulfurization performance of lime is closely related to the activity and microstructure parameters. There is a strong positive linear relationship between the desulfurization rate and the lime’s activity. During hot metal pretreatment, the diffusion of liquid slag inside the lime was found as a controlling factor of lime melting. Lime with high activity and large pore structure helps to improve slagging.