On each line, the plant operates a rotary dryer that feeds into a rotary kiln where the nickel ore is dried and reduced and then fed into an electric furnace for complete reduction into a molten nickel/iron alloy. The nickel/iron alloy is then placed into an oxygen converter and blown with oxygen to reduce the iron content, thereby increasing the nickel content. The ferronickel is then transported to a Holding furnace where the temperature is raised to cast the metal, in form of granules.
The core product of FENI is nickel metal in the form of ferronickel, which is an alloy with approx. 20% nickel content and 80% iron content, produced by smelting and refining various nickel ores containing 0.9% to 2.2% nickel and 15% to 40% iron. Since ferronickel is a primary raw material for stainless steel production, it is exported to the steel plants around the world (Europe, Asia and America).
Aside from ferronickel as a core product, slag is also generated in FENI Industries as a residual from the ore processing technology in use. The slag is a by - product that is generated simultaneously with ferronickel. Two types of slag are generated in FENI: slag from electro - furnaces and slag from convertors.