A secondary material for steel refining is to be supplied to a molten iron together with a lime so as to promote a desulfurization reaction in the molten iron. The secondary material for steel refining contains aluminum nitride in an amount of 20 wt % or more in terms of weight percentage.

A device and a method for continuous desulphurisation of liquid iron provided by a blast furnace process or a direct reduction process. The device including a desulphurisation reactor or a plurality of consecutive desulphurisation reactors. The desulphurisation reactor or reactors each include an entry section for receiving liquid iron from liquid iron production means or from the desulphurisation reactor immediately preceding the subsequent desulphurisation reactor, and a reaction section for removing the sulphur from the liquid iron.

A method for manufacturing pig iron in an electrical smelting furnace including a vessel, the method including the following successive steps: loading DRI product in the vessel, melting the DRI product to form a pig iron layer topped by a slag layer, and injecting a desulphurizing reagent directly in the pig iron layer. It also deals with the manufacturing of steel from the pig iron and the associated electrical smelting furnace.

A method for manufacturing pig iron in an electrical smelting furnace including a vessel 20, the method including the following successive steps: loading DRI product in the vessel, melting the DRI product to form a pig iron layer topped by a slag layer, and injecting a desulphurizing reagent directly in the pig iron layer. It also deals with the manufacturing of steel from the pig iron and the associated electrical smelting furnace.