A PROCESS FOR DESULFURIZING CAST IRON PIG IRON AND STEELS AND FOR THE NODULARIZATION OF CAST IRONS

摘要

PCT No. PCT/FR80/00073 Sec. 371 Date Jan. 17, 1981 Sec. 102(e) Date Dec. 17, 1980 PCT Filed May 12, 1980 PCT Pub. No. WO80/02565 PCT Pub. Date Nov. 27, 1980.The invention relates to a process for the desulphurization of cast irons and steels. The product is constituted of the combination of magnesium shot or magnesium alloy with rounded contours having a granulometry of between 0.1 and 3 mm and a granulated slag having a basicity index higher than 1, containing alumina, lime, silica and magnesia, and optionally an additional flux having a granulometry of between 0.1 and 3 mm in a proportion ranging from 90 to 10% and preferably from 80 to 20% of magnesium shot and from 10 to 90% and preferably from 20 to 80% of granulated slag. Application to the desulphurization of forge pigs and foundry pig irons, to the nodularization of foundry pig irons by nozzle injection in a carrying gas stream into the liquid cast iron or steel.