Process for the manufacture of steel

摘要

In a process for dephosphorizing steel which is relatively poor in phosphorus, and containing a quantity of oxide sufficient to bind the phosphorus, the molten steel is intermixed with a molten sufficiently fluid basic non-reducing slag which contains very little or no oxidizing agent with such violence that an emulsion-like and turbulent mixture of metal and slag is produced. The process may be carried out as described in Specification 405,633, and the slag used comprises mainly lime and magnesia with the addition of fluxes such as spar alumina, soda, &c. and contains a minimum of silica. A slag comprising 17 per cent of silica, 8,32 of alumina and the remainder lime and magnesia is referred to.