复合尾矿废渣微晶玻璃析晶性能的研究  

Crystallization Property of Glass-ceramics from Multiplicate Tailings

作　　者：张翠玲[1] 陆雷[1] 江勤[1] 王永志[1] 

机构地区：[1]南京工业大学材料科学与工程学院,江苏南京210009

出　　处：《矿冶工程》2010年第1期81-83,共3页Mining and Metallurgical Engineering

摘　　要：以钢渣、铜尾矿、粉煤灰及砂岩为主要原料,添加少量Fe2O3和Cr2O3作为复合晶核剂,以CaO-Al2O3-SiO2三元系、透辉石为主晶相,采用非均匀成核制得复合尾矿微晶玻璃建筑装饰材料。利用差热分析方法(DTA)制定了复合尾矿废渣微晶玻璃的热处理制度,采用XRD和SEM方法研究了复合尾矿废渣微晶玻璃的析晶性能。结果表明,晶化温度在710和720℃时,微晶玻璃处于分相状态,没有晶体析出;而晶化温度在800℃时,玻璃相已成为絮状晶粒结构,析出适量透辉石晶体。The building material of multi-tailings glass-ceramics was prepared by heterogeneous nucleation method with steel slags, copper tailings, fly ash and sandstone as raw materials, Fe2O3 and Cr2O3 as nucleation agents and CaO- Al2O3-SiO2 system and diopside as principal crystalline phases. Heat treatment system for the glass-ceramics was estab-lished by differential thermal analysis （DTA）. The crystallization property of the glass-ceramics was investigated by XRD and SEM. The results showed that the glass-ceramics was in the stage of phase separation without crystallization when the crystallization temperature was 710 ℃ or 720 ℃. A certain amount of diopside crystal was appeared and the glass phase changed into a flocculent grain structure at the temperature of 800 ℃.

关 键 词：微晶玻璃 复合尾矿 晶核剂 析晶过程 

分 类 号：TQ171[化学工程—玻璃工业]