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7 d 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℃。
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 carboniza-tion 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 at 60 ℃,90 ℃ and 120 ℃ for 7 days,the mass of steel slag increased by 1 5.30%,1 7.48% and 23.84%;the volume of steel slag increased by 5.9%,6.5% and 1 1.44%;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 mechani-cal strength and energy saving,the optimum carbonization temperature for steel slag was 90 ℃.
参考文献
| [1] | E.-E.Chang;Shu-Yuan Pan;Yi-Hung Chen;Hsiao-Wen Chu;Chu-Fang Wang;Pen-Chi Chiang.CO_2 sequestration by carbonation of steelmaking slags in an autoclave reactor[J].Journal of hazardous materials,2011:107-114. |
| [2] | Chang, E. E.;Chiu AnChia;Pan ShuYuan;Chen YiHung;Tan ChungSung;Chiang PenChi.Carbonation of basic oxygen furnace slag with metalworking wastewater in a slurry reactor.[J].International Journal of Greenhouse Gas Control,2013:382-389. |
| [3] | 董晓丹.转炉钢渣快速吸收二氧化碳试验初探[J].炼钢,2008(05):29-32. |
| [4] | 吴昊泽;张林菊;叶正茂;程新;常钧;郑文军.水分对钢渣碳化的影响[J].济南大学学报（自然科学版）,2009(3):221-224. |
| [5] | Joshuah K. Stolaroff;Gregory V. Lowry;David W. Keith.Using CaO- and MgO-rich industrial waste streams for carbon sequestration[J].Energy Conversion & Management,20055(5):687-699. |
| [6] | 赵华磊,吴昊泽,常钧,程新.碳酸化养护钢渣混合水泥制备建材制品[C].中国硅酸盐学会水泥分会首届学术年会论文集,2009:1-5. |
| [7] | 吴昊泽,赵华磊,谭文杰,丁亮,刘梅,常钧,程新.CO2预养护钢渣粗粉制备大掺量钢渣水泥的研究[C].中国硅酸盐学会水泥分会首届学术年会论文集,2009:1-5. |
| [8] | 侯贵华,王占红,朱祥.转炉钢渣中物相易磨性及胶凝性差异的研究[C].中国硅酸盐学会水泥分会首届学术年会论文集,2009:1-7. |
| [9] | 侯贵华;李伟;郭伟;陈景华;罗驹华;王京刚.转炉钢渣的显微形貌及矿物相[J].硅酸盐学报,2008(4):436-443. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%