METHOD FOR GOLD AND SILVER ALLOYS SEPARATING BY VACUUM DISTILLATION AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2022 - IPC C22B9/04 C22B11/00 F27D99/00 

FIELD: metallurgy.

SUBSTANCE: invention refers to metallurgy of noble metals to obtain high-purity metals. The method of separating gold-silver alloy by vacuum distillation involves heating of the gold-silver alloy in a melting pot in high vacuum to the temperature of silver evaporation from the surface of its melt and silver condensation from the resulting silver-vapor mixture into solid state in the condensation zone of the cooled condenser. Silver condensation from the steam-gas mixture is carried out with creation of conditions for occurrence of crystallization germinal centers by localization of the condensation zone in the direction of steam-gas mixture flow movement from the pot to the condensation zone at a higher pressure of the steam-gas mixture. The following ratio should be complied with: T_con. <T_mel, where T_con. and T_mel. mean condensation temperature and melting temperature of the deposited silver.

EFFECT: invention allows to increase the productivity of the device without emission of harmful and hazardous substances into the environment and to improve the purity of metal separation and reduce the process cycle time.

11 cl, 1 dwg