| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method for recovering sulfide precipitates in which a mole ratio of S/(Ni+Co) is controlled to a value of≤1.05 equivalent to that of a sulfide formed by using hydrogen sulfide, preferably a value in the vicinity of 1 which is a stoichiometric composition of NiS and CoS, as a method for recovering nickel and/or cobalt sulfide by adding an alkali sulfide to an acidic aqueous solution containing nickel and/or cobalt and precipitating the nickel and/or cobalt sulfide. <P>SOLUTION: In the method for recovering the nickel and/or cobalt sulfide, the inside of a reactor vessel is turned to be under nonoxidizing gas atmosphere and then the alkali sulfide is added to the aqueous solution and the sulfide is formed by precipitation, while maintaining an oxidation-reduction potential (Ag/AgCl electrode standard) at -300 to 100 mV. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
