Study on the Pneumatic Lime Injection in the Electric Arc Furnace Process: An Evaluation on the Performance Benefits

The pneumatic lime injection during the electric arc furnace (EAF) process by insufflation lances mounted on walls has gained much interest in latest years. main advantages, comparison to traditional procedure of lumps addition within scrap bucket, can be summarized raw materials consumption reduction, foaming benefits, operational cost and improvement environmental aspects. In proposed work, advantages a new system developed Unicalce S.p.A. installed 90 t EAF Acciaierie di Calvisano are analyzed. Data from more than 1200 heats acquired compared with practice an energetically emissions point view. To evaluate benefits slag foamability, several samples, taken at beginning end refining stage, analyzed through isothermal solubility diagrams (ISDs). ISD analysis results then validated total harmonic distortion (THD) corresponding heat. upgrade drives considerable savings electrical consumptions, oxygen, methane, lime, overall save 4,000 year −1 equivalent CO 2 .