| 常钧,熊苍.碱环境下单碳型水化碳铝酸钙加速碳酸化机理[J].,2019,59(5):536-542 |
| 碱环境下单碳型水化碳铝酸钙加速碳酸化机理 |
| Accelerated carbonation mechanism of monocarboaluminate under alkaline environment |
|
| DOI：10.7511/dllgxb201905013 |
| 中文关键词:单碳型水化碳铝酸钙加速碳酸化碳酸钙文石 |
| 英文关键词:monocarboaluminateaccelerated carbonationcalcium carbonatearagonite |
| 基金项目:国家自然科学基金资助项目(51172096). |
|
| 摘要点击次数:762 |
| 全文下载次数:688 |
| 中文摘要: |
| 单碳型水化碳铝酸钙是钢渣水化后的矿物之一．通过X射线衍射、热重分析、傅里叶红外光谱以及场发射扫描电镜对单碳型水化碳铝酸钙在碱环境下加速碳酸化的矿物衍变进行了分析．结果表明，不同碱浓度下单碳型水化碳铝酸钙加速碳酸化的主要产物为方解石、文石、球霰石和无定形的含铝矿物．随着碱浓度的增加，方解石析晶先受到促进后被抑制；文石析晶先被抑制后受到促进；球霰石析晶则一直被抑制且形成的晶体结构不稳定．在碱浓度为1 mol/L，即pH为14时，单碳型水化碳铝酸钙经碳酸化处理几乎不生成文石，而在碱浓度为0.01 mol/L，即pH为12时，单碳型水化碳铝酸钙碳酸化反应后生成针棒状文石晶体． |
| 英文摘要: |
| Monocarboaluminate is common mineral in the hydrated steel slag. X-ray diffraction (XRD), thermogravimetric analysis (TG), Fourier infrared spectroscopy (FT-IR) and field emission scanning electron microscopy (FE-SEM) are used to analyze the evolution of minerals under alkaline environment. Results show that the major products of accelerated carbonation of monocarboaluminate under different alkali concentrations are calcite, aragonite, vaterite and amorphous aluminum mineral. As the alkali concentration increasing, the crystallization of calcite is firstly promoted and then inhibited, the crystallization of aragonite is firstly inhibited and then promoted, and the crystallization of vaterite is inhibited with a unstable crystal structure during the whole carbonation process. When the alkali concentration is 1 mol/L (pH=14), aragonite is almost not generated by the carbonation of monocarboaluminate. When the alkali concentration is 0. 01 mol/L (pH=12), the needle bar aragonite crystal is generated after the carbonation of monocarboaluminate. |
| 查看全文查看/发表评论下载PDF阅读器 |
| --> | 关闭 |
优惠券领取后72小时内有效，10万种最新考研考试考证类电子打印资料任你选。涵盖全国500余所院校考研专业课、200多种职业资格考试、1100多种经典教材，产品类型包含电子书、题库、全套资料以及视频，无论您是考研复习、考证刷题，还是考前冲刺等，不同类型的产品可满足您学习上的不同需求。 ...考试优惠券 本站小编 Free壹佰分学习网 2022-09-19