攀枝花钛精矿预还原制备金属化球团技术研究

Preparation of Metallized Pellets from Panzhihua Titanium Concentrate by Pre-reduction

针对直接使用钛精矿冶炼钛渣存在的冶炼电耗高、钛渣产能低的问题,研究开发了攀枝花钛精矿'内配碳钛精矿压球—转底炉预还原'制备金属化球团新工艺。研究发现,影响金属化率的主要因素为:还原剂配比、还原温度、停留时间、冷却方式等。工业试验结果表明,球团金属化率达到70%,最高72.65%。SEM和物相分析表明:经碳热还原,钛精矿金属化后物相组成发生了明显的变化,由钛铁矿相转变为黑钛石、金属铁等物相。

Aiming at the problems of high power consumption and low production capacity of titanium slag produced by direct use of titanium concentrate in smelting titanium slag.A new process for preparing metallized pellets from Panzhihua titanium concentrate,"internal carbon containing titanium concentrate pressure ball,rotary hearth furnace pre-reduction",has been developed.It is found that the main factors affecting metallization rate are:reductant proportion,reduction temperature,residence time,cooling method,etc.Industrial test results show that: The metallization rate of pellets is up to 70%,with a maximum of 72.65%. The scanning electron microscope and phase structure analysis of shows that:The phase composition of titanium concentrate has changed obviously by carbon-thermal reduction,transformation from ilmenite phase to anosovite,iron and so on.