US 12,247,265 B2
Solid agglomerated product based on iron oxides and corresponding production method
Selena Tiburzio, Cervignano del Friuli (IT); Liliana Florina Arsene, Buttrio (IT); Luca Tommasi, Ronchi dei Legionari (IT); and Alessandra Primavera, Faedis (IT)
Assigned to DANIELI & C. OFFICINE MECCANICHE S.P.A., Buttrio (IT)
Appl. No. 17/280,706
Filed by DANIELI & C. OFFICINE MECCANICHE S.P.A., Buttrio (IT)
PCT Filed Sep. 25, 2019, PCT No. PCT/IT2019/050209
§ 371(c)(1), (2) Date Mar. 26, 2021,
PCT Pub. No. WO2020/065691, PCT Pub. Date Apr. 2, 2020.
Claims priority of application No. 102018000008995 (IT), filed on Sep. 27, 2018.
Prior Publication US 2024/0287640 A1, Aug. 29, 2024
Int. Cl. C22B 1/243 (2006.01); C21B 11/10 (2006.01)
CPC C22B 1/243 (2013.01) [C21B 11/10 (2013.01)] 18 Claims
OG exemplary drawing
 
1. Solid agglomerated product usable as a charge material for an electric arc furnace, said solid agglomerated product comprising:
at least one fraction of by-product deriving from a steel plant and comprising a first part containing ferrous oxide FeO and a second part containing ferric oxide Fe2O3;
a fraction of solid fuel (CR) containing a quantity of carbon (C_fix);
at least one inorganic binder to agglomerate said at least one fraction of by-product and said fraction of solid fuel (CR) with each other and to give the agglomerated product the required mechanical properties;
wherein said fraction of solid fuel (CR) is present in a quantity in weight determined by the formula CR=K*CS/C_fix, wherein:
K: is a constant comprised between 1.2 and 2.5;
CS: is a quantity of stoichiometric carbon in weight defined by the formula CS=0.11* (Fe2+_tot)+0.16*(Fe3+_tot), where Fe2+_tot is a quantity in weight of iron contained in said first part, and Fe3+_tot is a quantity in weight of iron contained in said second part, wherein the inorganic binder at least partly comprises slag.