Process of dephosphorizing pig iron

Claim 1

PROCESS FOR DEPHOSPHORIZING A MELT OF PIG IRON WITHOUT SIGNIFICANT DECREASE OF THE CARBON CONTENT, COMPRISING ESTABLISHING IN AN UPRIGHT CONTAINER A MELT OF SAID PIG IRON, SUPPLYING BASIC SLAG FORMING MATERIAL INCLUDING LIME AND IRON OXIDE TO THE MELT TO FORM A MOLTEN DEPHOSPHOROZING BASIC SLAG, SAID MELT OF PIG IRON AND MOLTEN SLAG FORMING A BATH, ESTABLISHING A GAS-FILED SPACE IN SAID CONTAINER ABOVE SAID BATH, MAINTAINING SAID BATH AT A TEMPERATURE WITHIN THE RANGE FROM 1200*C. TO 1500*C., MOVING AT LEAST THE BOTTOM PORTION OF SAID CONTAINER SUBSTANTIALLY HORIZONTALLY REPEATEDLY BETWEEN GIVEN LIMITS, SO AS TO BRING ABOUT A VIGOROUS MOVEMENT OF SAID BATH RELATIVE TO SAID CONTAINER WHILE PASSING A STREAM OF AN OXIDIZING GAS RICH IN OXYGEN FROM ABOVE INTO SAID GASFILLED SPACE ABOVE SAID BATH WITHOUT PENETRATION OF SAID STREAM INTO BATH, ADJUSTING THE OXIDATION THUS BROUGHT ABOUT A LEAST BY ADJUSTING THE INTENSITY OF SAID VIGOROUS MOVEMENT OF THE BATH UNTIL THE PHOSPHORUS IN THE MELT IS OXIDIZED AND TRANSFERRED TO THE SLAG, DISCONTINUING SAID VIGOROUS MOVEMENT AND SAID PASSING A STREAM OF AN OXIDIZING GAS RICH IN OXYGEN SHORTLY BEFORE SAID BATH IS CLEARLY BOILING AND DISCHARGING THE SLAG CONTAINING PHOSPHORUS THEREBY OBTAINING DEPHOSPHORIZED PIG IRON.