| 引用本文: | 杨慧芬,党春阁,马雯,景丽丽.硅铝调整剂对赤泥制备陶粒的影响[J].材料科学与工艺,2011,19(6):112-116.DOI:10.11951/j.issn.1005-0299.20110620. |
| YANG Hui-fen,DANG Chun-ge,MA Wen,JING Li-li.Effcet of silica-alumina regulator on preparation of ceramisite using red mud as main material[J].Materials Science and Technology,2011,19(6):112-116.DOI:10.11951/j.issn.1005-0299.20110620. |
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| 摘要: |
| 为经济有效地利用我国排放量巨大的赤泥,消除其对环境的污染,在对赤泥进行化学组成、矿物组成和热稳定性分析基础上,提出以赤泥本身方解石为发泡剂,外加废玻璃、膨润土为硅铝调整剂制备赤泥陶粒的研究,并利用XRD和SEM方法对所得陶粒的组成和内部结构进行了分析.结果表明:废玻璃、膨润土单独调整或联合调整均可优化赤泥陶粒的性能,但联合调整所得陶粒性能较优;当赤泥、废玻璃、膨润土质量比为74∶15∶11时,所得陶粒的容重、筒压强度、吸水率分别为1.43 g/cm3、22.14 MPa、1.23%;陶粒产品中的晶体矿物主要为钙黄长石,而赤泥中的主要晶体矿物为方解石,正是赤泥本身方解石高温分解产生的CO2使得陶粒内部具有多孔的结构;废玻璃、膨润土联合调整所得陶粒较废玻璃、膨润土单独调整所得陶粒的内部孔隙发达,孔径均匀. |
| 关键词: 赤泥 调整剂 陶粒 钙黄长石 空隙 |
| DOI：10.11951/j.issn.1005-0299.20110620 |
| 分类号:X705 |
| 基金项目: |
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| Effcet of silica-alumina regulator on preparation of ceramisite using red mud as main material |
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YANG Hui-fen, DANG Chun-ge, MA Wen, JING Li-li
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Civil and Environmental Engineering school,University of Science and Technology Beijing, Beijing 100083,China
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| Abstract: |
| To reduce environmental pollution from red mud and to recycle red mud economically and effectively,the preparation of ceramisite,using red mud as main material and calcite in red mud itself as foaming agent,adding waste glass and bentonites as silica-alumina regulator,was investigated based on analyzing of chemical composition,mineral composition and thermal stability of red mud.Main constituents of obtained ceramisites were discussed by XRD,and their internal structures were observed by SEM.The results showed that the properties of ceramisite can be optimized whether the waste glass,bentonites was added singly or simultaneously into red mud,but the properties of the latter was more excellent than the former.When weight ratio of red mud/waste glass/bentonites was at 74∶ 15∶ 11,the ceramisite with bulk density of 1.43 g/cm3,cylinder compressive strength(CCS) of 22.14 MPa and 1 h water absorption rate(WAR) of 1.23% was obtained.The main crystalline phases in ceramisite was gehlenite,different from calcite in red mud.It is CO2 generated by decomposition of calcite in red mud itself that drives ceramisite to get abundant pores in its internal structure.The porosity of ceramisite was higher and its pore size was more uniform when the waste glass and bentonites were simultaneously added into red mud. |
| Key words: red mud regulator ceramisite gehlerite porosity |
