The invention discloses a method for efficiently concentrating
precious metal from a difficultly-treated
palladium-containing waste catalyst. The method includes the steps that the
palladium-containing waste catalyst,
copper mud pressurizing
slag, a
reducing agent and a fluxing agent are heated and subjected to heat insulation;
slag and a precious
lead alloy are subjected to cooling separation,
grinding is conduced, and sampling analysis of the content is conducted; vacuum melting
distillation separation is conducted on the precious
lead alloy, a
vacuum furnace rare and precious
alloy and a
lead bismuth alloy are obtained, and the
precious metal is separated from lead and
bismuth. By means of the method, a melting low-temperature alkaline concentration
smelting method is used for treatingthe high
silicon and aluminum
carrier type high and low grade
palladium-containing waste catalyst and the
copper anode mud pressurizing
slag, gradient comprehensive utilization of gold, silver and
platinum family
precious metal, lead,
bismuth and dissipated, rare and precious
metal elements is achieved, the process is the shortest, the cost is the lowest, and efficiency is the highest. The palladium-containing waste catalyst rate can be large and can be small, the treatment capability is flexible, concentration
smelting treatment is achieved, and concentration
smelting of the palladium familyprecious
metal is not affected; and a melting low-temperature alkaline smelting technology is adopted, the smelting temperature is far lower than that of matte smelting,
energy consumption is greatlyreduced, and therefore the
machining cost of the difficultly-treated waste catalyst is reduced.