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高炉渣合成NaA 沸石及影响因素
作者:何茂成1 张建良1 国宏伟2 史志文1 刘峰1 薛济来1 
单位:1. 北京科技大学冶金与生态工程学院 北京 100083 2. 苏州大学沙钢钢铁学院 江苏 苏州 215021 
关键词:高炉渣 沸石 水热合成 废物利用 结晶 
分类号:TQ 177.1
出版年,卷(期):页码:2015,43(11):1617-1624
DOI:10.14062/j.issn.0454-5648.2015.11.15
摘要:

 从高炉渣中提取二氧化硅作为合成沸石的硅源,用水热合成法合成了高炉渣沸石。采用X 射线衍射、扫描电子显微镜、能谱等手段研究了温度、水热时间、原料配比等合成参数对沸石合成的影响。研究Na 含量和碱度对沸石合成的影响。结果表明:随原料中n(SiO2)/n(Al2O3)摩尔比提高,合成的沸石晶型由A 型向X 型转变。温度、水热时间和碱度对于结晶形貌有显著影响,特别是随碱度的提高产生晶粒细化,而Na 含量对沸石合成的影响微弱。最适宜的高炉渣沸石合成条件为:原料摩尔比n(SiO2):n(Al2O3):n(Na2O):n(H2O)=2:1:6:240,合成温度为100 ℃左右,合成时间大于5 h。

 Zeolite of blast furnace slag (BFS) was synthesized via a hydrothermal method with silica from BFS as a raw material. Theinfluences of crystallization temperature, crystallization time, raw material ratio and Na2O-to-H2O ratio (i.e., sodium content andalkalinity) on the synthesis product were investigated. The results show that the key factor affecting the crystalline type isn(SiO2)/n(Al2O3) mole ratio, and the crystalline type of zeolite transforms from A to X when n(SiO2)/n(Al2O3) mole ratio increases.Crystallization time, crystallization temperature and alkalinity all have effects on the crystal morphology, and the increase ofalkalinity produces the effect of grain refining. However, sodium content has a slight effect on the experimental results. It is indicatedthat the zeolite of BFS can be synthesized under suitable conditions (i.e., the molar ratio of n(SiO2):n(Al2O3):n(Na2O):n(H2O) of2:1:6:240, the synthesis temperature of 100 ℃, and the synthesis time of >5 h).

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基金项目:
北京高校青年英才计划(FRF-TP–12-020A)项目;北京科技大学钢铁冶金新技术国家重点实验室开放基金(KF14-11)项目。
作者简介:
第一作者:何茂成(1990—),男,硕士研究生。 通信作者:张建良(1965—),男,博士,教授。
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