吉林建筑大学学报

针对氩氧脱碳工艺产生的不锈钢渣(Argon oxygen decarburization，简称AOD渣)活性低、易磨性差、利用率低等问题，通过物理激发(调控粉磨时间与助磨剂)与化学激发(添加激发剂)，系统探究其对AOD渣活性指数、粒度分布及比表面积的影响，并基于改性AOD渣制备固废低碳胶凝材料。试验表明，AOD渣粉磨15 min时，其45μm筛余量降至5.4%，比表面积达482 m²/kg；助磨剂掺量为0.06%时，其筛余量进一步降至3.52%，比表面积升至524 m²/kg。当胶凝材料按AOD渣20%、矿渣48.5%、石膏16%、CS-1型激发剂15.5%配比时，砂浆试块标准养护28 d后，其抗折强度为6.5 MPa、抗压强度为46.6 MPa，较对照组K0分别提升52.3%、49.8%。通过SEM分析可知，砂浆微观结构更致密，水化产物C—S—H凝胶与AFt搭接紧密，为强度提升提供支撑。

Addressing the issues of low activity,poor grindability,and low utilization rate of stainless steel slag(Argon oxygen decarburization,abbreviated as AOD slag) produced by the argon-oxygen decarburization process,systematically investigated the effects of physical excitation (regulating grinding time and grinding aids) and chemical excitation (adding activators) on the activity index,particle size distribution,and specific surface area of AOD slag.Based on the modified AOD slag,a low-carbon cementitious material for solid waste is prepared.Experiments show that when the AOD slag is ground for 15 minutes,its 45μm sieve residue decreases to 5.4%,and its specific surface area reaches 482 m²/kg;when the grinding aid content is 0.06%,the sieve residue further decreases to 3.52%,and the specific surface area increases to 524 m²/kg.When the cementitious material is prepared with a ratio of 20%AOD slag,48.5% slag,16%gypsum,and 15.5% CS-1 activator,after standard curing for 28 days,the flexural strength is 6.5 MPa and the compressive strength is 46.6 MPa,which are 52.3% and 49.8%higher than those of the control group K0,respectively.SEM analysis reveals that the microstructure of the mortar is denser,with hydration products C—S—H gel and AFt closely overlapping,providing support for the strength improvement.