Method of producing ferrous metal of constant properties from heterogeneous mixtures

摘要

A method of producing ferrous alloys, especially cast irons, having predetermined properties and of predetermined quality from heterogeneous raw materials with corrective additives, the quality of the final product being independent of the raw materials used. In a cupola charged with alternate layers of coke and raw materials and set in operation, ozone is continuously added in small amounts as well as a compound for liberating nitrogen, such as hydrogenated nitrogen compounds and organic nitrogenous compounds, and an halogen, such as methyl chloride or chlorobenzene. Liquidus temperature curves are plotted for given temperature and additions of steel, for obtaining the optimum liquidus temperature. The melting is continued as a function of the desired relationship of carbon equivalent, eutectic temperature and amounts of steel, for example, to be added, and tensile strength thereby maintaining the optimum liquidus temperature.