The main objective of waste management is the recovery of a valuable component (eg. metal, energy). Thanks to the use of waste as raw materials in certain industrial processes prevents their storage, and also creates the possibility of liquidation of existing landfills. A characteristic feature of the examined waste - sludge from the steel industry - is significant iron content. This article presents the results of chemical composition of the deposited sludge and from current production. Knowledge of the chemical composition is the basis of proposals for their development.Keywords: Steel industry, sludge, chemical composition
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