PROCESS FOR REFINING HOT METAL

摘要

21421-217 The invention relates to a process for producing steel of low phosphorus content from hot metal of usual phosphorus content, in which the hot metal is simultaneously decarburised and dephosphorised in a single process step in a metallurgical vessel, in particular in a converter. The refining gas consisting predominantly or completely of technically pure oxygen is top-blown onto the melt and an inert stirring gas is blown into the melt, particularly from below. The vessel is charged with hot metal containing manganese in an amount of less than 0.2 % by weight. Lime is then added and refining is carried out down to a final phosphorus content of 0.005 % by weight or less in the steel at the end of blowing, without a change of slag. 84/326CA