硅酸盐学报

高炉渣合成NaA 沸石及影响因素

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).

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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