Acciaieria Arvedi issues final acceptance certificate for electric arc furnace from Primetals Technologies

Acciaieria Arvedi S.p.A., an Italian steel producer, has issued U.K.-based Primetals Technologies the final acceptance certificate for a new electric arc furnace. The furnace was installed in the Cremona Steel Works. The production capacity is 1.4 million metric tons of crude steel per annum. The order also included a dedusting system for primary and auxiliary dedusting and for supplementary extraction points. This is combined with a heat recovery system, which uses the thermal energy in the furnace offgases to generate steam, which then is used in the works' three pickling plants.

The 150-ton electric arc furnace increases Acciaieria Arvedi production capacity while reducing conversion costs. The tap-to-tap time is 36 min. and is supported by single-bucket operation. This enables around 200 metric tons of crude steel to be produced each hour. The electricity requirement of the furnace is 340 to 350 kWh per metric ton. The necessary energy is provided via a transformer with a power of 155 MVA. The furnace usually is charged with a mixture of 65 percent scrap iron, 25 percent pig iron, and 10 percent hot-briquetted iron. The scope of delivery also included five refining combined burner systems, burners for postcombustion, a newly developed electrode control system, a water leakage control system, and a new type of automatic tap hole filling.

An existing dedusting system was modified for the new electric arc furnace. The total extraction volume has been increased by installing an additional filter for both auxiliary and supplementary extraction points on the new electric arc furnace. The dedusting system achieves residual dust contents of less than 5 mg per standard cubic meter of air.