Method for producing cast iron by adopting converter blowing smelting and purification

• Main Authors: LU FENG, XU ZHONGMIN, LU WENHUA
• Format: Patent
• Language: Chinese; English
• Published: 26.11.2014
• Subjects: CHEMISTRY; METALLURGY; METALLURGY OF IRON; PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS

A method for producing cast iron by adopting converter blowing smelting and purification comprises the following steps: 1, adding an iron-containing raw material and auxiliary materials into a furnacebody in a charging proportioning stage, and heating and making oxidizing slag in a preliminary melting stage; 2, blowing a gas to the above obtained melt and making the oxidizing slag in an oxygen blowing heating oxidation stage; 3, blowing the gas to the melt and making reducing slag in a blowing purification and reduction stage; and 4, carbonizing iron or graphitizing. The method allows high-quality molten iron to be produced in a blast furnace enterprise without high-quality iron ore, and can also realize the production of highly pure pig iron and corresponding high-end cast members. The high-end cast members can be produced in the cast iron enterprise without the high-quality molten iron from the blast furnace enterprise, and the molten iron produced through cupola and blast furnace melting undergoes oxidatio