The invention provides a method for extracting refined gold from
palladium-silver-containing
anode mud, relates to the field of
noble metal wet
metallurgy, and particularly relates to a method for purifying the gold from the
palladium-silver-containing
anode mud. The method mainly comprises the following steps: adding the
palladium-silver-containing
anode mud into
hydrochloric acid and carrying out chlorination dissolving; carrying out temperature rising type
chlorine removing on filtered parting liquid; then adding
dimethylglyoxime to carry out palladium
sedimentation and
impurity removal; after reaction is finished, carrying out precision filtering, wherein filtrate is gold raw liquid; introducing
choline into the gold raw liquid and increasing
electric potential; when the
electric potential is up to more than 1000mV, stopping the introducing of the
choline; adding a saturated
sodium hydrogen sulfite solution into the gold raw liquid and reducing; when the
electric potential is up to 620mV-630mV, stopping the reducing; and filtering after cooling, and further recycling valuable
metal from the filtrate, wherein a
filter cake is reduced gold
powder. According to the process, the
impurity palladium removing rate is high, the valuable
metal can be comprehensively recycled, a flow structure is simple and the cost is low. When
dimethylglyoxime is used for carrying out palladium
sedimentation operation, the reaction is environmentally-friendly; and toxic and harmful gas is not generated and the reaction is rapid and efficient.