Solid agglomerated product based on iron oxides and corresponding production method
AssigneeDanieli & C. Officine Meccaniche SpA
InventorsLuca TOMMASI, Selena TIBURZIO
Life of this patent
Estimating the term…
Abstract
Solid agglomerated product, such as a briquette (B), which can be used as charge material for an electric arc furnace, comprising at least one by-product fraction (M; M1, M2, M3) deriving from a steel plant and comprising a first part containing ferrous oxide FeO and a second part containing ferric oxide Fe2O3, a solid fuel fraction (CR) containing a quantity of carbon (C_fix) and at least one inorganic binder to agglomerate a by-product fraction (M; M1, M2, M3) and the solid fuel fraction (CR) together and give the required mechanical properties to the agglomerate.
Claims20
Solid agglomerated product, such as a briquette, usable as charge material for an electric arc furnace, said solid agglomerated product comprising:
- at least one by-product fraction deriving from a steel plant and comprising a first part containing ferrous oxide FeO and a second part containing ferric oxide Fe2O3;
- a solid fuel fraction containing a quantity of carbon;
- at least one inorganic binder to agglomerate said at least one by-product fraction and said solid fuel fraction together;
- at least one organic binder to agglomerate said at least one by-product fraction and said solid fuel fraction together;
- wherein said solid fuel fraction is present in a quantity by weight determined by the relation CR=K*CS/C_fix, wherein:
- K:
- is a constant comprised between 1.0 and 2.5;
- CS:
- is a quantity by weight of stoichiometric carbon defined by the relation CS=0.11*(Fe2+_tot)+0.16*(Fe3+_tot), where Fe2+_tot is a quantity by weight of iron contained in said first part, and Fe3+_tot is a quantity by weight of iron contained in said second part.
Method for making a solid agglomerated product comprising:
- making available at least one by-product fraction comprising a first part containing ferrous oxide FeO and a second part containing ferric oxide Fe2O3;
- making available a solid fuel fraction containing a quantity of carbon;
- mixing at least said by-product fraction with said solid fuel fraction and with at least one inorganic binder and with at least one organic binder,
- wherein, before said mixing, it comprises determining a quantity by weight of said solid fuel fraction by means of the relation CR=K*CS/C_fix, wherein:
- K:
- is a constant comprised between 1.0 and 2.5;
- CS:
- is a quantity by weight of stoichiometric carbon defined by the relation CS=0.11*(Fe2+_tot)+0.16*(Fe3+_tot), where Fe2+_tot is a quantity by weight of iron contained in said first part, and Fe3+_tot is a quantity by weight of iron contained in said second part.
Dependencies are inferred from the claim text.