Process for making it possible to discard a metallurgical slag containing oxidised sodium and phosphorus compounds on a dump or a slag heap

摘要

A basic alkaline-earth metal compound 6 capable of forming a water-insoluble compound with the phosphorus of the slag is added to the slag 5, kept in the molten state. The invention applies to slags from the removal of phosphorus from pig iron using sodium carbonate. <IMAGE>