METHOD FOR PRODUCING NICKEL POWDER HAVING LOW CARBON CONCENTRATION AND LOW SULFUR CONCENTRATION

摘要

Provided is a production method for reducing the content grades of sulfur and carbon, which are impurities contaminating a nickel powder, for the purpose of improving the quality of a nickel powder produced employing a complexing reduction process. A method for producing a nickel powder having a low carbon concentration and a low sulfur concentration, said method being characterized by comprising: carrying out a complexing treatment, wherein the complexing treatment comprises adding a complexing agent to an aqueous nickel sulfate solution to produce a solution containing nickel complex ions; blowing a hydrogen gas into the solution containing nickel complex ions while maintaining the solution at a liquid temperature of 150 to 2500C in a pressure container to achieve hydrogen reduction, thereby producing a nickel powder; washing the nickel powder with water; and roasting the washed product under a nitrogen/hydrogen mixed gas atmosphere.