Production of alloy steel

Claim 1

A PROCESS FOR THE PRODUCTION OF STAINLESS STEEL FROM CRUDE IRON AND SOLID CARRIER CONSISTING AT LEAST IN PART OF CHROMIUM, NICKEL AND MOLYBDENUM BY OXYGEN TOP BLOWING, SAID PROCESS INCLUDING THE STEPS OF CHARGING LIQUID CRUDE IRON, WHICH FORMS BETWEEN 20% AND 75% BY WEIGHT OF THE TOTAL CHARGE, INTO A BLOWING CONSISTING OF CRUDE IRON BEING SELECTED FROM THE GROUP CONSISTING OF PIG IRON AND HOT AIR CUPOLA FURNACE IRON, BLOWING SAID LIQUID CRUDE IORN IN A FIRST BLOWING PHASE BENEATH A HIGHLY BASIC SLAG, WHICH IS RICH IN FERRIC OXIDE, TO YIELD AN INTERMEDIATE PRODUCT HAVING A PHOSPHORUS CONTENT OF LESS THAN 0.025%, REMOVING SAID SLAG, ADDING A MAIN PORTION OF SOLID ALLOY CARRIER BEARING NICKEL AND MOLYBDENUM TOGETHER WITH A HEAT CARRIER TO SAID CRUDIBLE, CONTINUING BLOWING SAID CHARGE IN A SECOND PHASE UNTIL SAID MAIN PORTION OF SOLID ALLOY CARRIERS IS LIQUEFIED, AND A PREDETERMINED CARBON CONTENT IS REACHED ADDING ANOTHER PORTION OF ALLOY CARRIER BEARING CHROMIUM, SILICON AND CARBON, CONTINUING BLOWING IN A THIRD BLOWING PHASE BENEATH A NEW BASIC SLAG HAVING A CAO/SIO2 RATIO OF AT LEAST 2.5 UNTIL THE CARBON AND SILICON INTRODUCED WITH SAID OTHER PORTION OF ALLOY CARRIED HAVE BEEN REMOVED, TREATING SAID NEW BASIC SLAG WITH REDUCING AGENTS TO REDUCE THE SLAG ALLOY CONSTITUENTS AND ADDING THE REMAINDER OF SAID ALLOY CARRIER TO SAID CRUCIBLE.