| [Solid and liquid wastes from industrial processes: Innovations in material recovery and environmental protection] Assessment of By-products from Metal Producing Industry – Development of a Certification Procedure and Case Study “Dust from Secondary Copper Industry” Assessment of By-products from Metal Producing Industry – Development of a Certification Procedure and Case Study “Dust from Secondary Copper Industry” Gustav Hanke1; Juergen Antrekowitsch2; 1UNIVERSITY OF LEOBEN, Leoben, Austria; 2CHRISTIAN DOPPLER LABORATORY, Leoben, Austria; PAPER: 78/Recycling/Regular (Oral) SCHEDULED: 11:55/Tue. 29 Nov. 2022/Arcadia 2 ABSTRACT: <p>Every year, millions of tons of by-products from the metal producing industry are dumped as waste and this amount is continuously rising. As these by-products often contain considerable amounts of valuable metals, a huge quantity of potential metal resources is lost. Not only the loss of value, but also the aspect of environmental care suggests a treatment of this material as it is very often problematic in this regard. The reasons for not treating these residues are very diverse. Two main reasons are: firstly, there is no evaluation procedure available as it is for primary resources (causing little confidence and reliability for investments) and secondly, the lack of applicable technologies. A competence network involving Montanuniversität Leoben and numerous partners from industry was formed in order to treat this topic. The project consists of three areas: characterization and evaluation, process development and optimization, as well as the development of an evaluation procedure for secondary resources. The first two areas represent all steps beginning at the first characterisation of an unknown residue to the treatment in terms of mineral processing and metallurgy, process optimization and a final product and its optimization. In the third area, all of the experience gained is combined and used to develop a procedure that guarantees a serious evaluation of secondary resources. Such a procedure, as it is already in worldwide use for primary resources, will give companies and investors a reliable base for treating such materials. Until now, many different materials, such as steel mill dust, lead slag and hydrometallurgical residues from zinc production have been evaluated and treated successfully up to technical scale. The results are partly already published [1, 2]. As another case study, this paper summarizes the investigations and test results of dust from secondary copper industry. These dusts often contain considerable amounts of zinc, lead, tin and copper [3]. The main methods used are standard techniques such as scanning electron microscopy, electron microprobe analysis and X-ray fluorescence analysis. Besides the characteristics of this residues, a proposal for its metallurgical treatment will be presented as well.</p> References: <p>[1] G. Hanke & J. Antrekowitsch, Characterisation and pyrometallurgical recycling of jarosite type residues out of zinc primary metallurgy. - World of Metallurgy – Erzmetall 71.1 (2018) [2] W. Schatzmann & J. Antrekowitsch, Wastes: Solutions, Treatment and Opportunities (2019) [3] O. Rentz, M. Krippner, S. Hähre, Report on Best Available Techniques in German Copper Production, University Karlsruhe (1999)</p> |
