Explanation

alloy with iron and nickel as the main components usually contain between 20% and 70% nickel. According to the different content of carbon and phosphorus, it can be divided into the following five groups: low carbon (carbon content less than 0.03%, phosphorus content less than 0.03%), low carbon and low phosphorus (carbon content less than 0.03%, phosphorus content less than 0.02%), medium carbon (carbon content between 0.03% and 1.0%, phosphorus content less than 0.03%), medium carbon and low phosphorus (carbon content between 0.03% and 1.0%, phosphorus content less than 0.02%), and high carbon (carbon content between 1.0% and 2.5%, phosphorus content less than 0.03%). The trademark and chemical composition of ferronickel are specified in GB/T25049-2010. The production process of ferronickel includes obtaining high ferronickel from nickel bearing vulcanization ore by pyro smelting, obtaining vulcanization nickel by flotation, and obtaining crude nickel by reduction melting. These crude nickel can be prepared by electrolysis or other methods, or ferronickel with high nickel content can be obtained by further refining. Nickel oxide ore is usually produced by coke or ferrosilicon reduction smelting to produce ferronickel, and blast furnace method or electric furnace method can be adopted. ferronickel is widely used in alloy manufacturing because nickel is an element used to expand the austenite area. Therefore, ferronickel is used to produce austenilic stainless steel, heat resistant steel, alloy structural steel, tool steel and alloy cast iron with low temperature toughness requirements. In addition, electrolytic nickel and ferronickel with high nickel content are also widely used as raw materials in the production of high temperature alloy, especially nickel-base superalloy.

Classification