Process for the production of high alloyed steels

Claim 1

IN A PROCESS FOR THE PRODUCTION OF HIGH ALLOY STEELS WITH A CONTENT OF ALLOYING ELEMENTS OF AT LEAST 10% IN A REFINING RECEPTACLE, WHEREIN THE METAL BATH IS REFINED BY OXYGEN BLOWN FROM ABOVE AGAINST THE BATH, THE IMPROVEMENT WHICH COMPRISES INTRODUCING DIRECTLY INTO SAID METAL BATH IN INCREMENTS, AT LEAST SUCH ALLOYING MEANS, WHICH CONTAIN ALLOYING ELEMENTS WITH A GREATER AFFINITY WITH RESPECT TO OXYGEN THAN IRON, AND ALSO INTRODUCING DIRECTLY INTO SAID METAL BATH SUCH HEATING MATERIALS WITH A GREATER AFFINITY WITH RESPECT TO OXYGEN THAN IRON AND THAN THE ALLOYING ELEMENTS IN SOSLID STATE, AND REFINING SAID METAL BATH BETWEEN THE SINGLE ADDITIONS OF THE INCREMENTS BY OXYGEN BLOWN FROM ABOVE AGAINST SAID METAL BATH, THE INCREMENTS OF THE ALLOYING MEANS AND OF THE HEATING MATERIALS BEING, WITH REFERENCE TO THE PROCESS TIME, DISTRIBUTED IN SUCH A MANNER THAT THE PARTIAL QUANTITY OF THE HEATING MATERIALS FOLLOWING NEXT IS ADDED AT A CONTENT OF THE BATH IN HEATING MATERIALS WHICH IS JUST SUFFICIENT TO PROTECT THE ALLOYING ELEMENTS FROM EXCESSIVE BURNING OFF AND TRANSFER INTO THE SLAG AND THE INCREMENTS OF THE HEATING MATERIALS WITH RESPECT TO THE INCREMENTS OF THE ALLOYING MEANS BEING SELECTED SO THAT AT THE END OF THE REFINING PROCESS AT LEAST 80% FO THE ALLOYING MEANS ADDED ARE FOUND IN THE STEEL, AND THE RATIO OF THE ALLOYING MEANS AND THE HEATING MATERIALS ADDED BEING FURTHER SELECTED SO THAT, BEFORE THE ADDITION OF THE NEXT INCREMENT, THE TEMPERATURE OF THE MELT DOES NOT EXCEED 1750*C. BUT IS 100 TO 250*C. HIGHER THAN THE LIQUIDUS-TEMPERATURE OF THE MOLTEN ALLOY AND RECOVERING THE HIGH ALLOY STEEL, THE ENTIRE PROCEDURE FROM ADDING OF SAID ALLOYING AND SAID HEATING MATERIALS THROUGH SAID RECOVERING OF THE HIGH ALLOY STEEL BEING CARRIED OUT IN THE ABSENCE OF EXTERNAL HEATING.