【摘要】 将钢渣压制成一定形状的试块,分别在60℃、90℃及120℃下采用CO₂对试块进行了碳化处理。对碳化后试块的质量、体积、抗压强度的变化进行了测试。采用X射线能谱仪（XRD）、热重-差热分析仪（TG-DSC）分析了碳化过程中的物相变化。用扫描电子显微镜（SEM）观察了碳化后产物的微观形貌。研究结果表明,在60℃、90℃、120℃碳化温度下碳化7d后,试块的质量分别增加15.30%、17.48%、23.84%;试块的体积分别增加5.9%、6.5%、11.44%;试块的抗压强度分别达到32.87 MPa、39.62 MPa、42.38 MPa。钢渣碳化后产物主要为CaCO₃。从碳化后试块的力学强度和节能两方面综合考虑,碳化的最佳温度为90℃。更多还原

【Abstract】 Steel slag was pressed into pellets with a certain shape,and then they were carbonized using CO₂ at temperature 60 ℃,90 ℃ and 120 ℃ respectively.Change of mass,volume and mechanical strength after carbonization were tested.Structural changes of steel slag during carbonization were characterized with XRD and TG-DSC.Morphologies of the carbonized steel slag were characterized with SEM.The results indicated that after carbonized at60℃,90℃and 120℃for 7days,the mass of steel slag increased by 15.30%,17.48%and 23.84%;the volume of steel slag increased by 5.9%,6.5% and 11.44%;and the mechanical strength of steel slag increased to 32.87 MPa,39.62 MPa and 42.38 MPa,respectively.The main phase of carbonized steel slag was CaCO₃.Considering mechanical strength and energy saving,the optimum carbonization temperature for steel slag was 90 ℃.更多还原