Oxidation roasting of molybdenite concentrate  

辉钼精矿的氧化焙烧(英文)

作　　者：王璐[1] 张国华[1] 党杰[1] 周国治[1] 

机构地区：[1]北京科技大学钢铁冶金新技术国家重点实验室,北京100083

出　　处：《Transactions of Nonferrous Metals Society of China》2015年第12期4167-4174,共8页中国有色金属学报（英文版）

基　　金：Projects(51474141;51174022)supported by the National Natural Science Foundation of China

摘　　要：In order to investigate the oxidation roasting of molybdenite concentrate in pure oxygen atmosphere, experiments at 673, 723, 773, 873 and 973 K were carried out. The phase transitions and morphology evolutions of the samples obtained at different temperatures after reacting for different time were analyzed by X-ray diffraction（XRD） and scanning electron microscopy（SEM）. The results showed that molybdenite concentrate was oxidized directly to Mo O3 in pure oxygen atmosphere. There were remarkable changes of the morphologies of products with the increase of the roasting temperature. It was also found that sintering phenomenon occurred during the roasting process in pure oxygen when the temperature was above 873 K. The composition of sintered sample was mainly comprised of Mo O3 and some unreacted Mo S2.为研究辉钼精矿的氧化焙烧机理分别在673、723、773、873、973 K下进行氧化焙烧实验。分别采用X射线衍射(XRD)和扫描电子显微镜(SEM)对氧化过程中产物的物相和形貌进行分析。结果表明,在纯氧条件下,Mo S2直接氧化成Mo O3,并且随着焙烧温度的升高,产物的形貌发生了明显变化。在纯氧气氛下,当温度高于873 K时有烧结现象发生,烧结物大部分是由氧化产物Mo O3组成,同时含有少量未氧化完全的Mo S2。

关 键 词：oxidation roasting molybdenite concentrate MORPHOLOGY SINTERING 

分 类 号：TF046.2[冶金工程—冶金物理化学]