The Effect of Equivalent Metallization DRI on EAF Electrical Energy Demand

by Ketut Sunarwa and Nizar Achmad

Publisher - Slab Steel Plant

Category - General Novel

Electrical energy consumption in EAF is influenced by some factors such as input materials, metallurgical process, furnace design, kind of refractory, dedusting system, chemical energy used and energy recovery. Input materials as well as metallurgical process are classified as controllable variables, meanwhile, the rests are correlated with the design (equipment) of the furnace. Energy required for DRI melting is quite different from scrap because of its quality. The ‘quality” of DRI means three factors: content of gangue, ratio of metallic iron to total iron (metallization) and equivalent metallization. The amount of gangue in DRI requires additional slag formers resulting in higher energy used, meanwhile, the metallization can save energy exponentially. The equivalent metallization is defined as a combination between quantity of iron oxide (FeO) and total carbon. Such an equivalent metallization is formulated as the following: % Equivalent metallization = % Metallization + 6 (% Carbon)

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