Raw material yard management and the feeding of the blast furnaces are essential processes for an integrated steelwork, and for CST in particular as the Company plans to raise their annual output from 5 to 7.5 Mt. Accordingly, CST has developed a model of raw material supply that takes into account every step of the cycle. The model includes two complementary modules, one for supply and consumption of the raw materials and the other one for raw materials transport. The model has revealed the need for a significant increase of the conveyor capacity and has made it possible to define more appropriate priority rules.