| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method by which, when valuable metals are recovered from a leachate obtained by chlorine leaching of copper electrolysis slime having a high arsenic concentration, an extraction residual liquid after extraction separation of gold is treated with an anion exchange resin and then high purity selenium is recovered from the residual liquid after adsorption. <P>SOLUTION: Gold is extracted from the leachate of copper electrolysis slime, platinum group elements are adsorbed with an anion exchange resin, and then sodium hydrogen sulfite is added to the residual liquid after adsorption, and a formed palladium-containing precipitate is separated by filtration. Sulfur dioxide is blown into the resulting filtrate, whereby selenium is reduced and recovered. It is preferable to adjust the chloride concentration of the residual liquid after adsorption to 2.0-2.5 mol/L and adjust the temperature to 30-50°C. <P>COPYRIGHT: (C)2012,JPO&INPIT |
