Method for producing industrial calcium chloride by using rare earth smelting high-salinity wastewater

The invention provides a method for producing industrial calcium chloride by using rare earth smelting high-salinity wastewater, which comprises the following steps: firstly, adding lime slurry into rare earth smelting extraction wastewater to adjust the pH value, remove magnesium ions and remove oil, and adding barium chloride into the obtained neutralization solution to remove heavy metal ions and radioactive elements; heavy metal ions and suspended solids are further removed through an electric flocculation method, finally, refined filtration is conducted through calcium carbonate sand filtration, an industrial-grade calcium chloride solution can be obtained, and a calcium chloride product is obtained after evaporation and concentration. According to the method, the high-purity calcium chloride is produced by directly utilizing the rare earth smelting high-salinity wastewater, the problems of heavy metal and radioactive pollution caused by a conventional high-salinity wastewater concentration production me