Abstract:Formation and growth of slag rim in continuous casting mold is one of the important causes to worse slab quality. In this article,the chemical ingredient,physical-chemical properties,crystallized mineralogical phases,composition and structure of slag rim,original mold flux and mold flux for 304 stainless steel after 60 min from casting start were studied. The results show that TiO2 and Cr2O3 in molten steel moved into the mold flux and generated some oxides with high melting point during continuous casting process,during which the completely melting temperature and viscosity of mold liquid flux and slag rim increased obviously,while the basicity and break temperature decreased. The mold liquid flux and slag rim were mainly composed of cuspidine and gehlenite. The precipitation of high-melting-point phase gehlenite and the increasing of mold flux viscosity caused by TiO2 and Cr2O3 are the main causes to form the slag rim in mold.
收稿日期: 2016-03-01
出版日期: 2016-07-26
引用本文:
任 磊,张立峰,王强强,赵 星. 304不锈钢连铸过程中结晶器渣圈形成机制[J]. 钢铁, 2016, 51(8): 35-40.
REN Lei,ZHANG Li-feng,WANG Qiang-qiang,ZHAO Xing. Formation mechanism of slag rim in 304 stainless steel continuous casting mold. Iron and Steel, 2016, 51(8): 35-40.
K.C. Mills,YLang,R.T. Jones. Estimating the physical properties of slags[J].Journal of the Southern African Institute of Mining and Metallurgy, 2011, 111(10):649-658
[8]
K.C. Mills,YLang,R.T. Jones. Estimating the physical properties of slags[J].Journal of the Southern African Institute of Mining and Metallurgy, 2011, 111(10):649-658
[9]
S.Sridhar,KC. Mills,O.D.C. Afrange,et al. Break temperatures of mould fluxes and their relevance to continuous casting[J].Ironmaking & steelmaking, 2000, 27(3):238-242
[9]
S.Sridhar,KC. Mills,O.D.C. Afrange,et al. Break temperatures of mould fluxes and their relevance to continuous casting[J].Ironmaking & steelmaking, 2000, 27(3):238-242
[10]
J.A. Kromhout,CLiebske,S. Melzer,et al. Mould powder investigations for high speed casting[J].Ironmaking & Steelmaking, 2009, 36(4):291-299
[10]
J.A. Kromhout,CLiebske,S. Melzer,et al. Mould powder investigations for high speed casting[J].Ironmaking & Steelmaking, 2009, 36(4):291-299