摘要
为了避免含氟精炼渣中氟的污染,结合炉渣基础理论,经过熔渣黏度和熔点影响因素的分析并通过正交试验得出优选的无氟预熔型精炼渣组成CaO=48%、Al2O3=40%、SiO2=4%、MgO=8%,该精炼渣的黏度和熔点分别为:0.78 Pa.s和1389℃.精炼渣的工业试验表明,精炼初期成渣速度快,为加快生产节奏奠定了基础.与原含氟精炼渣相比,避免氟污染问题;钢液平均脱硫率为86.5%,提高了7.5%;连铸坯中N、H、O的平均含量分别为:47.5×10-6、2.4×10-6、32.5×10-6,分别降低了13%、15%、15%;连铸坯中夹杂物的尺寸显著地减小,连铸坯的质量得到提高.
Preferred fluorine-free pre-mehing slag composition was attained by analyzing the slag viscosity and melting point of impact factors and orthogonal experiments （CAO=48 %, A1203=40 %, SiO2=4 %, MgO=8 %） to avoid the fluorine pollution based on the molten slag theory. The viscosity and melting point were 0.78 Pa＇s and 1389℃. The industrial tests showed that the slag quickly formed at the beginning of refining, which established the foundation to accelerate the production pace. The slag, compared with the slag with CaF2, showed no pollution of fluorine. The average desulfurization rate of steel was 86.5 % with an addition by 7.5 %. The average contents of N, H, O in the billet were 47.5x10-6, 2.4x10-6, 32.5x10-6 respectively, with reductions by 13 %, 15 % and 15 %. The billet inclusion size dropped significantly with improving billet.
出处
《有色金属科学与工程》
CAS
2012年第5期45-49,共5页
Nonferrous Metals Science and Engineering
关键词
LF精炼
预熔精炼渣
脱硫
无氟
LF refining
pre-melted refining slag
desulphurization
non-fluoride
