| 摘要: |
| 采用偶氮氯膦Ⅲ分光光度法研究碳酸化前后钢渣中Ca2+的浸析情况,并以乙二醇法测定碳酸化前后钢渣中f CaO含量.结果表明：在温度为70℃，相对湿度为80%，CO2体积分数为99.9%，CO2压力为0.35MPa的条件下碳酸化180min，钢渣(0.154~1.000mm)中Ca2+的浸析浓度由未碳酸化前的102.31μg/mL降为44.97μg/mL，钢渣(<0.074mm)中f CaO含量(质量分数)由未碳酸化前的2.67%降为0.58%；在溶解时间相同情况下，钢渣颗粒粒径越小，Ca2+浸析浓度越大. |
| 关键词: 碳酸化 钢渣 Ca2+浸析 碳酸化时间 偶氮氯膦Ⅲ |
| DOI：10.3969/j.issn.1007 9629.2012.03.010 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目（51172096）；教育部新世纪优秀人才计划资助项目 |
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| Spectrophotometric Research of Leaching Law of Ca2+ from Steel Slag by Using Chlorophosphonazo as Spectral Chromogenic Reagent |
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CHANG Jun1, ZHAO Hua lei2
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1.School of Civil Engineering, Dalian University of Technology, Dalian 116024, China;2.Jiangsu Institute of Building Science Co,, Ltd., Nanjing 210008, China
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| Abstract: |
| The leaching law of Ca2+ from steel slag before and after carbonation were analyzed by spectrophotometry with chlorophosphonazo as spectral chromogenic reagent. The content of f CaO in steel slag was tested with ethylene glycol. The results show that under carbonation conditions of 70℃, 80%RH, φco2=99.9%, pco2=0.35MPa, the leaching concentration of Ca2+ from steel slag(0.154~1.000mm) reduces from 102.31μg/mL before carbonation to 44.97μg/mL after 180 min carbonation. The content(by mass) of f CaO in steel slag(<0.074mm) reduces from 2.67% to 0.58%. The smaller the particle size of steel slag, the higher the leaching concentration of Ca2+ for the same leaching time. |
| Key words: carbonation steel slag Ca2+ leaching carbonation time chlorophosphonazo |
