以氯化钙为氯化剂,采用氯化焙烧-水浸取的方法处理钡渣,钡渣中的钡以氯化钡的形式被回收。通过焙烧温度、焙烧时间、氯化剂用量等一系列条件实验确定了适宜工艺条件：焙烧温度为1 000 ℃、焙烧时间为45 min、氯化钙用量为理论量的1.3倍。在此条件下钡渣中的酸溶钡可全部回收,钡的回收率为86.8%。浸出液主要成分是氯化钡和氯化钙,经过蒸发浓缩、结晶析出氯化钡产品,其质量符合GB/T 1617—2014《工业氯化钡》的要求。

Barium slag was treated by chlorination roasting-hot water leaching process using CaCl₂ as chlorinating agent and the barium was recovered in the form of BaCl₂ from barium slag.Through a series of experiments such as roasting temperature,roasting time and chlorinating agent amount etc.,the optimal technological conditions were determined as follows：the roasting temperature is 1 000 ℃,the roasting time is 45 min and the amounts of CaCl₂ is 1.3 times of the theoretical value.Under the optimal conditions,the acid dissolved barium in barium slag was recovered completely with the recovery rate of barium at 86.8%. The main components of the leaching solution were BaCl₂ and CaCl₂.The product of BaCl₂ is obtained by evaporating,concentrating and crystallizing,which quality meets the requirements of GB/T 1617—2014,Barium Chloride for Industrial Use.