Norilsk Nickel Harjavalta Oy produces metallic nickel to be used as raw material in the manufacturing of stainless steel and various metal alloys and for surface treatment purposes. Composed of several hydrometallurgical subprocesses, the production line processes raw nickel matte, nickel sediments and some secondary raw materials. After grinding, leaching and solution purification phases, the process solution is divided and directed into cathode and briquette production lines. Cathode nickel is made of nickeliferous solution by electrolytic precipitation. Briquettes are made of metal powder obtained by reducing nickel from the solution with hydrogen.

Metallic nickel (cathode) produced by Norilsk Nickel Harjavalta Oy conforms to the requirements London Metal Exchange (LME) has set for marketed nickel (ASTM standard B39-79/1/).

The company also produces nickel chemicals (inorganic nickel salts) from the nickel sulphate solution obtained by nickel extraction as its raw material. Nickel chemicals can be different nickel sulphates, nickel hydroxides and hydroxycarbonates.