| 霓辉正长岩制取铝酸钠溶液预脱硅的实验研究 |
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| 引用本文： | 王霞,马鸿文,俞子俭,王晓艳,邹丹.霓辉正长岩制取铝酸钠溶液预脱硅的实验研究[J].现代地质,2011,25(1):157-162. |
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| 作者姓名： | 王霞 马鸿文 俞子俭 王晓艳 邹丹 |
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| 作者单位： | 中国地质大学矿物材料国家专业实验室,北京,100083 |
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| 基金项目： | "十一五"国家科技支撑计划课题 |
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| 摘 要： | 霓辉正长岩提钾滤渣的主要物相为沸石Na6AlSiO4]6.4H2O,富含氧化铝和氧化硅。采用高压水化学法对其进行碱热浸取可得到高苛性比的铝酸钠溶液,通过添加不同类型的脱硅剂对其进行一步脱硅法对比实验研究。正交实验结果表明,在脱硅的过程中,影响因素的顺序为:脱硅剂类型>脱硅时间>脱硅温度。通过进一步单因素实验,确定优化脱硅条件为:采用水合铝酸钙为脱硅剂,在160℃下反应3.5 h,即可制得硅量指数大于1 800的铝酸钠精制液。经X射线衍射分析,脱硅产物的主要物相为水化石榴石;扫描电镜及能谱分析结果显示,生成物水化石榴石的晶型较好,在晶粒细小处S iO2杂质容易附着,从而达到更好的脱硅效果。
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| 关 键 词： | 霓辉正长岩 预脱硅 脱硅剂 水化石榴石 |
Pre-desilication of Sodium Aluminate Solution from Aegirine-augite Syenite:An Experimental Study |
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| WANG Xia,MA Hong-wen,YU Zi-jian,WANG Xiao-yan,ZOU Dan.Pre-desilication of Sodium Aluminate Solution from Aegirine-augite Syenite:An Experimental Study[J].Geoscience——Journal of Graduate School,China University of Geosciences,2011,25(1):157-162. |
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| Authors: | WANG Xia MA Hong-wen YU Zi-jian WANG Xiao-yan ZOU Dan |
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| Institution: | WANG Xia,MA Hong-wen,YU Zi-jian,WANG Xiao-yan,ZOU Dan(National Laboratory of Mineral Materials,China University of Geosciences,Beijing 100083,China) |
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| Abstract: | The principal phase of potassium-distilled filter residue of aegirine-augite syenite is sodium aluminum silicate hydrate rich in Al2O3 and SiO2.The high caustic ratio sodium aluminate solution was obtained from filter residue treated by high pressure hydrochemical process.The desilication reaction was experimentally studied by adding different types of desilication agents.The orthogonal experimental results show that in the process of the desilication from sodium aluminate solution,the descending order of a... |
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| Keywords: | aegirine-augite syenite pre-desilication desilication agent hydrogarnet |
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