METHOD OF PROCESSING PERSISTENT URANIUM ORES, COMPRISING BRANNERITE

摘要

1. A method for treating refractory uranium ores containing brannerite and complex uranium-containing ores, including uranium-containing ores grinding to a particle size minus 0.3 mm, sulfuric acid leaching of uranium and other valuable components, including gold, characterized in that after comminution of ores and ore concentrates spend their pretreatment solutions of ammonium bifluoride (BPA) with concentrations of 1 ... 40% at temperatures of 25 ... 80 ° C, T: L = 1: (1 ... 5) and the duration of the process 1 ... 4 h, followed by joint uranium leaching and gold of the resulting cakes leach solution containing 150 ... 300 g / L of HSO, 1% by weight of the ore NaCl and 1 ... 2% by weight of HNO3 ore as oxidizing agent, at temperatures of 60 ... 80 ° C, T: L = 1: 1 and duration of 2 ... 12 h; the resulting ammonium hexafluorosilicate solution was treated with anhydrous ammonia at temperatures of 25 ... 60 ° C to pH 10 Ammonium bifluoride solution separated from the precipitate formed, increase its concentration to 1 ... 40% by introducing anhydrous HF and fed it to the step of pretreating the starting syrya.2. A method according to claim 1, characterized in that the pretreatment is carried out at a temperature of 80 ° C.3. A method according to claim 1, characterized in that the pretreatment is carried out for 1 p.4. A method according to claim 1, characterized in that the pretreatment is carried out with a solution having a concentration of BPA 1 .5%. A method according to claim 1, characterized in that the pretreatment is carried out with a ratio S: L = 1: 1.6. A method according to claim 1, characterized in that the co-leaching of uranium and gold of the resulting cakes after pretreatment is carried out at a temperature of 80 ° C.7. A method according to claim 1, characterized in that the joint