A method for removing silicon from a nickel sulfate leach solution

Abstract

The application discloses a method for removing silicon from a nickel sulfate leaching solution and relates to the technical field of hydrometallurgy. The method for removing silicon from the nickel sulfate leaching solution comprises the following steps: mixing and reacting the nickel sulfate leaching solution with a silicon removal agent, wherein the silicon removal agent comprises metal powder, activated carbon and an anionic surfactant; and the metal powder is selected from at least one of copper powder and manganese powder. The silicon removal reaction is performed by using the metal powder, the activated carbon and the anionic surfactant, a small primary cell is formed by using the metal powder and the activated carbon, an electric field and a potential difference are generated around the nickel sulfate leaching solution system by using the electrochemical properties of the nickel sulfate leaching solution system, the anionic surfactant is used as a flocculant, and colloidal silicon is deposited under the action of the electric field, so that the purified nickel sulfate solution is obtained through solid-liquid separation. The metal powder and the activated carbon do not participate in the chemical reaction, so that no impurity elements are introduced, and the metal powder and the activated carbon can be recycled, thereby reducing the production cost.

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