摘要
以粗钡渣和二氧化碳为原料,采用碳化法制备了高纯碳酸钡粉体。用热水浸取粗钡渣得到硫化钡饱和溶液,通过添加合适的氟化铵作为沉淀剂去除硫化钡溶液中的锶和钙,探讨了反应温度、氟化铵用量对除杂效果的影响。二氧化碳气体通入精制后的硫化钡溶液中,进行碳化反应,研究了氟化铵对碳酸钡晶粒形貌和大小的影响,并对所得到的产物进行SEM和XRD表征。实验结果表明:氟化铵用量为理论计算值2倍时,碳化反应后得到高纯球状碳酸钡产品,达到了对碳酸钡纯度控制的初步目的。
High purity barium carbonate powder was prepared by carbonization method with crude barium residue and carbon dioxide as raw materials.Crude barium residue was soaked to obtain barium sulfide liquid saturation.A suitable ammonium fluoride as a precipitating agent was added to remove the strontium and calcium in barium sulfide solution.The effects of reaction temperature and the amount of ammonium fluoride on the impurity removal effect were investigated.Carbon dioxide gas was added to the filtration of barium sulfide solution to take the carbonization reaction,the influences of the amount of ammonium fluoride on the morphologies and size of Ba CO3 crystals were investigated.The obtained crystals were characterized by scanning electron microscopy(SEM) and X-ray diffraction(XRD).Results revealed that when ammonium fluoride dosage was two times of the theoretical value,the high barium carbonate was obtained after carbonation,reaching a preliminary purpose of barium carbonate purity control.
出处
《无机盐工业》
CAS
北大核心
2016年第10期50-53,共4页
Inorganic Chemicals Industry
关键词
硫化钡
氟化铵
碳化
高纯
碳酸钡
barium sulfide
ammonium fluoride
carbonization
high purity
barium carbonate