PROCESSING METHOD OF GOLD-CONTAINING ANTIMONY CONCENTRATE AND LINE FOR ITS IMPLEMENTATION Russian patent published in 2019 - IPC C22B30/02 C22B11/00 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy of gold and antimony. Mixture of flotation and ore-bearing gold-antimony, at ratio of 1:0.5, dust of recycled electric smelting and refining dust, ground slag in the presence of iron chips, lime and coal is processed by precipitation-reduction melting in ore-and-thermal furnaces. Blister antimony is fed into a reflecting furnace with bottom for refining. To remove impurities during refining, silicon oxide, sulfur, sodium sulphite and sodium hydroxide are added. Refined antimony is poured into cast iron molds placed on a mechanical conveyor. After cooling antimony ingots are folded onto metal trays and transferred to the section producing antimony trioxide and antimony gold-containing alloy. Sublimation of antimony is carried out in contractile reflecting furnaces with silicate heaters with size of bottom of 0.8 m×3.0 m. Electric furnace design on the silite heaters and the heating method provide for the possibility to perform the antimony oxidation and sublimation in the smooth mode. Sublimate is quenched in quenching furnace with width of 0.2 m, length of 0.4 m and height of 0.25 m to obtain senarmontite with 99.0 to 99.3–99.5 % by abrupt cooling of gas flow with 900 °C to 300 °C. Obtaining Sb₂O₃ particle size below 1.4 mcm. From bottom residue of sublimation furnace electrodes are made, which are directed to electrolysis with separation of cathodic antimony. Slag of noble metals formed during electrolysis is dissolved and gold is extracted from solution. Duration of process during 35 days to obtain antimoniate gold-bearing alloy with gold content of not less than 10 kg/t.

EFFECT: invention increases selective extraction of gold and antimony.

3 cl, 2 dwg, 1 tbl