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The Brazilian ironmaking has a waste average generation of 700kg per ton of produced steel. Recuperation of metallic contents presented in these wastes came to be very important either concerned to the limits obliged by the environmental legislation or by the economical point of view, inasmuch as they replace raw-materials employed in process. Mill scale is a product from the oxidation of steel when it is submitted to the thermal gradient or just action of weather. One pilot plant was installed in the VMB’s ETE-III, where was produced the cleaned mill scale for testing on the own company. The technique of USD showed this material is of easy processing and that it enhances its aggregated value, replacing with efficiency the use of scrap in refining operations.

ASPECTOS TÉCNICOS DA UTILIZAÇÃO DA CAREPA GERADA EM PROCESSOS SIDERÚRGICOS E TRATADA POR DESAGREGAÇÃO ULTRA-SÔNICA