Influence of bottom blowing oxygen on dust emission in converter steelmaking  

作　　者：Wei-feng Li Rong Zhu Chao Feng Bao-chen Han Guang-sheng Wei 

机构地区：[1]School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China [2]Beijing Key Laboratory of Research Center of Special Melting and Preparation of High-end Metal Materials,University of Science and Technology Beijing,Beijing 100083,China

出　　处：《Journal of Iron and Steel Research International》2021年第9期1105-1113,共9页

基　　金：the National Natural Science Foundation of China(Grant Nos.51574021 and 51474024);the Fundamental Research Funds for the Central Universities(FRF-TP-19-031A1).

摘　　要：With the importance of the steelmaking industry in the economy and its negative impacts on the environment,reducing dust emissions is a vital focus in this field.Thus,the theory of dust generation in converter steelmaking process was analyzed and the influence of bottom blowing oxygen on dust generation was obtained through experimental research.The industrial test was carried out in a 120-t bottom combined blown O_(2)–CaO steelmaking converter.The results show that lowering the lance position can reduce the amount of dust.This emission rate of the converter is also found to be in direct proportion to the decarburization rate.As a result,the proposed bottom blowing O_(2)–CaO steelmaking converter can technically reduce the amount of dust and improve the recovery rate of iron.With more bottom blowing oxygen,the dust content is lower with the dust peak appearing earlier.The evaporation theory,followed by the bubble theory,plays the primary role in the dust generation of bottom blowing oxygen steelmaking.It points out the direction for the technology research and development of reducing dust generation.

关 键 词：Steelmaking converter Dust emission Bottom blowing O_(2)-CaO Evaporation theory Bubble theory 

分 类 号：TF06[冶金工程—冶金物理化学]