Method of using wastewater generated in bastnaesite rare earth ore smelting and separation to remove fluorine

• Main Authors: YAN HAOWEI, WU XINGEN, YU XING, YU LONG
• Format: Patent
• Language: Chinese; English
• Published: 20.07.2018
• Subjects: CHEMISTRY; METALLURGY; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention discloses a method of using wastewater generated in bastnaesite rare earth ore smelting and separation to remove fluorine, and relates to the field of bastnaesite rare earth ore smeltingand separation. According to the method, wastewater with high concentration calcium salts in the chlorination system in bastnaesite rare earth ore smelting and separation is taken as a fluorine removal agent and is used to remove fluorine from wastewater with a high fluorine content; the wastewater with high concentration calcium salts is repeatedly used; individual discharging of two wastewateris avoided, the environment protection cost is largely reduced; the impurities in the fluorine removal agent are few, the pH value is low, the fluorine removing effect is good, the processed wastewater reaches the national first grade discharge standards; secondary and tertiary deep fluorine removing steps are eliminated, time is saved; during the fluorine removing process, the yield of calcium fluoride can reach 70%, calc