| 摘要 |
The process comprises leaching a ground material in an acid medium so as to dissolve a part of the ground material to obtain a solution containing metal ions and a portion of insoluble ground material, and separating the metal ions present in the solution. The step of separating the metal ions comprises separating metal ions contained in the solution using a first cation exchange resin such as a cation exchange sulfonic resin so as to obtain a solution of lithium ions, a solution of nickel ions, cobalt and/or manganese and a solution of aluminum ions. The process comprises leaching a ground material in an acid medium so as to dissolve a part of the ground material to obtain a solution containing metal ions and a portion of insoluble ground material, and separating the metal ions present in the solution. The step of separating the metal ions comprises separating metal ions contained in the solution using a first cation exchange resin such as a cation exchange sulfonic resin so as to obtain a solution of lithium ions, a solution of nickel ions, cobalt and/or manganese and a solution of aluminum ions, and separating a mixture of nickel and cobalt ions and manganese ions in the solution using a second cation exchange resin such as a cation exchange sulfonic resin so as to obtain a solution of nickel and cobalt ions and a solution of manganese ions. The separation of metal ions contained in the solution on the first cation exchange resin comprises eluting the solution using an acid with increased concentration or an aqueous solution of an alkaline salt with increased concentration. The solution is loaded on the first resin at a loading rate of 15-40% of the theoretical capacity of the resin. The step of separating the mixture of nickel and cobalt ions and manganese ions comprises eluting nickel and/or cobalt ions contained in the solution with a nickel and cobalt ion complexing solution, and eluting the manganese ion with sulfuric acid. |
