利用钛白副产硫酸亚铁制备正极材料磷酸铁锂的研究

摘要

Using the method of sulfate by-product of titanium white production process preparation of lithium iron phosphate, ferrous sulfate by subtraction of ferrous sulfate,ferrous sulfate of sulfate,mixed reaction,ionization process and a series of process units,lithium iron phosphate was prepared. Using Fourier transform infrared spectrometer,X - ray diffractometer,ICP spectrometer,differential thermal analyzer,X-ray photoelectric spectrometer,model 2000 PAN particle size analyzer,S - 3400 scanning electron microscope,the tap density meter,battery preparation system and so on carries on the physical and chemical properties test,found that the preparation of lithium iron phosphate uniform particle size,easy to implement production control, fully meet the requirements of battery cathode material,and reduce the production costs,reduce the risk of environment, implements the by-product comprehensive benefit and resource recovery,is an excellent resource utilization method.%采用硫酸法钛白粉生产过程中的副产硫酸亚铁制备磷酸铁锂,通过硫酸亚铁的除杂、硫酸亚铁的硫酸化、混合反应、离子化处理等一系列工艺单元,制备了磷酸铁锂.用傅里叶变换红外光谱仪、X-射线衍射仪、ICP光谱仪、综合差热分析仪、X-射线光电能谱仪、2000型PAN粒度分析仪、S-3400型电子扫描显微镜、振实密度仪、电池制备系统等进行物理化学性能测试,发现制备的磷酸铁锂粒径均匀,易于实现生产控制,完全满足电池正极材料的要求,而且减低了生产成本,减少了环境风险,实现了副产品的综合利于和资源回收,是一种优异的资源利用方法.