假白榴正长岩提钾滤渣硅铝分离的研究  

Study on silica-alumina separated in potassium-distilled filter residue of pseudoleucite syenite

作　　者：谭丹君[1] 马鸿文[1] 俞子俭[1] 王晓艳[1] 

机构地区：[1]中国地质大学材料科学与工程学院,北京100083

出　　处：《应用化工》2009年第4期529-531,536,共4页Applied Chemical Industry

基　　金：中国地质大学矿物材料国家专业实验室开放基金课题(2008D001)

摘　　要：假白榴正长岩提钾滤渣中的主要物相为沸石Na6[AlSiO4]6.4H2O,富含氧化铝和氧化硅。采用高压水化学法,按CaO/SiO2=1.0(摩尔比)加入Ca(OH)2进行碱热浸取可实现滤渣中的硅铝分离。实验得出的优化条件为:反应温度280℃,反应时间30 min,碱的加入量为每处理100 g提钾滤渣需NaOH200 g。氧化铝的溶出率大于88%,碱浸滤液为高苛性比铝酸钠溶液,可用于制取氢氧化铝和氧化铝产品。该工艺在综合利用非水溶性钾矿的同时,为铝业生产提供了新资源。The main phase of potassium-distilled filter residue of pseudoleucite syenite is a kind of zeolite rich in Al2O3 and SiO2. By high pressure hydrochemical process,adding Ca（OH）2 at the molar ratio of calcium oxide to silica was 1 ： 1, silica and alumina of the filter residue can be leached out. The experimental results show that the optimum conditions are： reaction temperature 280 ℃, reaction time 30 min, alkali dosing amount is 200 g NaOH per 100 g raw material. The leaching rate of alumina is over 88%, and the alkali leaching filter liquor can be used to prepare aluminum hydroxide and alumina. The technique in this paper exploits new resources for aluminium producing.

关 键 词：提钾滤渣 碱浸 硅铝分离 铝资源 

分 类 号：TQ133.1[化学工程—无机化工] X754[环境科学与工程—环境工程]