Manufacture method for directly smelting high-nickel ferronickel with low ore grade nickel materials

• Main Authors: MU TINGYUN, YANG JUNCHEN, TANG HUAYING, YANG YUSHENG, WU XIAO
• Format: Patent
• Language: Chinese; English
• Published: 16.07.2008
• Subjects: ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses a production method for directly smelting high nickel ferronickel with low-grade nickel materials and comprises the steps of measuring feed preparation, reduction smelting and tapping casting, etc; wherein, the invention uses the low-grade nickel ore with 1 to 2.5 percent of Ni as raw materials and directly smelts and produces high nickel ferronickel alloy products with the nickel content of 25 to 48 percent in the existing electric furnace by adopting a one-step method, which can provide rich nickel resources for smelting and producing high quality advanced stainless steel; the invention has the substantive features and marked improvements of fully reducing the nickel oxide while making reducing action of the iron oxide partially and incompletely to realize the aim of improving the nickel content in alloy in the furnace by controlling the reduction amount, which completely changes the conventional viewpoint in the present theory of fire method smelting and mixture that the oxide of ni