Performance of Low Fluoride Dephosphorization Slag of Hot Metal  

作　　者：LIU Li-xia WANG Shi-jun DONG Yuan chi JIA Xiao-hui 

机构地区：[1]School of Material and Metallurgy, Inner Mongolia University of Science and Technology, Baotou 014010, Inner Mongolia, China [2]School of Metallurgy and Resource, Anhui University of Technology, Ma'anshan 243002, Anhui, China [3]School of Materials Science and Engineering, Central South University, Changsha 410083, Hunan, China

出　　处：《Journal of Iron and Steel Research International》2011年第1期11-15,共5页

基　　金：Item Sponsored by National Natural Science Foundation of China and Baosteel(50674001)

摘　　要：The purpose of the study is to decrease content of CaF2 in dephosphorization slag. The dephosphorization effects of CaF2 replaced by B2O3 were investigated. The dephosphorization experiments were carried out at 1 450 ℃ in air atmosphere. The results show that the melting points and dephosphorization ratios change little when CaF2 was replaced by B2O3. The dephosphorization ratios are all greater than 80% and melting points can meet the requirement of hot metal pretreatment. Because of the change of alkalinity caused by B2 03, the oxidation of slag increases with increasing of B2 Oa contents. It is beneficial to pre-dephosphorization. As a result, for decreasing its pollution, CaF2 can be replaced by B2Oa to dispose fluoride-free pre-dephosphorization slag.The purpose of the study is to decrease content of CaF2 in dephosphorization slag. The dephosphorization effects of CaF2 replaced by B2O3 were investigated. The dephosphorization experiments were carried out at 1 450 ℃ in air atmosphere. The results show that the melting points and dephosphorization ratios change little when CaF2 was replaced by B2O3. The dephosphorization ratios are all greater than 80% and melting points can meet the requirement of hot metal pretreatment. Because of the change of alkalinity caused by B2 03, the oxidation of slag increases with increasing of B2 Oa contents. It is beneficial to pre-dephosphorization. As a result, for decreasing its pollution, CaF2 can be replaced by B2Oa to dispose fluoride-free pre-dephosphorization slag.

关 键 词：low fluoride slag hot metal pretreatment DEPHOSPHORIZATION phosphate capacity 

分 类 号：TQ328.904[化学工程—合成树脂塑料工业] TF549.9[冶金工程—钢铁冶金]