Method for desulfurizing molten metal and in particular liquid pig iron

Claim 1

IN A METHOD OF DESULFURIZING MOLTEN METAL WITH A SELECTED DESULFURIZING AGENT, THE STEP OF INTRODUCING INTO A BATH OF MOLTEN METAL IN LIQUID STATE HIGHLY CONCENTRATED SUSPENSION CONTAINING AT LEAST 5 KGS. OF FINELY SUBDIVIDED PARTILCES OF SAID SELECTED DESULFURIZING AGENT PER CUBIC METER OF GAS SO AS TO SPEED-DUE TO SAID HIGH CONCENTRATION OF SAID FINELY SUBDIVIDED SOLID PARTICLES OF DESULFURIZING AGENT IN SAID RELATIVELY SMALL QUANTITY OF GAS THE RATE OF REACTION TO SUCH A VALUE THAT THE TEMPERATURE DROP OF THE MOLTEN METAL-DUE TO ADMISSION OF SAID GAS-IS SO SMALL THAT THE DESULFURIZING REACTION TAKES PLACE AT A HIGH TEMPERATURE AND BEFORE A CONSIDERABLE TEMPERATURE DROP OCCURS, THEREBY ENSURING REACTION BETWEEN SAID MOLTEN METAL AND SAID SELECTED DESULFURIZING AGENT AT A TEMPERATURE AT WHICH THE EFFCIENCY OF THE DESULFURIZING ACTION OF SAID SELECTED AGENT IS SUBSTANTIALLY GREATER THAN AFTER SAID CONSIDERABLE DROP OF THE TEMPERATURE OF THE MOLTEN METAL.