Optimisation of Electric Arc Furnace Dust Recycling and Zinc Recovery by Scrap De-zincing

Optimisation of Electric Arc Furnace Dust Recycling and Zinc Recovery by Scrap De-zincing
Author:
Publisher:
Total Pages:
Release: 2007
Genre:
ISBN:

A considerable rise in the Electric Arc Furnace steelmaking has taken place in the EU during the last decade. As a result, the amount of steelmaking dust has increased as well. This dust is recycled in order to recover the valuable amount of zinc present in it. In contrast to the increase in dust generation, the capacity of recycling sites has not changed accordingly and there are growing concerns over this imbalance. In the present thesis, logistics and resource allocation of dust recycling in the EU are analysed. Data collected through a questionnaire survey was used to formulate the transportation model of linear programming. The results of the model highlight the location of gaps in recycling capacity and its uneven geographical distribution. The state of the recycling can be improved by research in scrap de-zincing; a process that can recover most of the zinc prior to steelmaking thereby lowering the total amount of dust. To this effect experiments were conducted using electro-galvanized scrap samples in order to study the kinetics of zinc evaporation. Various parameters such as the flow rate of carrier gas, scrap heating rate, packed bed voidage, permeability, and specific surface area were studied with a view of a possible scale-up of the process. The results show that there is a potential of integrating the de-zincing step into high temperature scrap pre-heating processes using shaft type systems that utilize off-gases of steelmaking and auxiliary burners.

Handbook of Recycling

Handbook of Recycling
Author: Christina Meskers
Publisher: Elsevier
Total Pages: 758
Release: 2023-10-17
Genre: Technology & Engineering
ISBN: 0323860133

Handbook of Recycling, Second Edition, Winner of the International Solid Waste Association's 2014 Publication Award, is an authoritative review of the current state of recycling, reuse and reclamation processes commonly implemented today and how they interact with one another. Fully updated to cover recent developments in the field, this second edition has also been restructured to cover General Aspects of Recycling, Applications, Technology, Recovery and Collection, Economics, Governance and Policy. Several new chapters on global recycled material flows, sludges, reinforced plastics, and landfill mining have been added. It concludes with a review of the policy and economic implications, including the impact of recycling on energy use, sustainable development, and the environment.This book is a crucial aid to students and researchers in a range of disciplines, from materials and environmental science to public policy studies. - Chapters authored by key experts from academia, industry, and the policymaking community - Provides a thorough analysis from theory to practice to deeply understand the fundamentals, dynamics, complex interactions, opportunities, and challenges of recycling, within the larger picture of a circular system - Describes the state of the art and lessons learned, to understand future challenges in recycling of a wide variety of products, materials, and waste flows - Introduces the tools and practices to understand the opportunities and limitations of recycling in the context of a circular economy

Fourth International Symposium on Recycling of Metals and Engineered Materials

Fourth International Symposium on Recycling of Metals and Engineered Materials
Author: Donald L. Stewart, Jr.
Publisher: John Wiley & Sons
Total Pages: 1244
Release: 2013-10-07
Genre: Technology & Engineering
ISBN: 1118787994

This proceedings collection continues the tradition established by earlier TMS Recycling Meetings in this series by presenting fundamental and practical aspects of recycling metals and engineered materials. This collection concentrates on fundamental and applied research and industrial practices in the recycling of a wide variety of materials including aluminum scrap recycling; aluminum dross processing; aluminum by-product recovery; automotive recycling; magnesium & titanium recycling; EAF dust processing; secondary zinc; secondary lead; secondary copper, nickel & coba< spent catalyst recycling; precious metals recycling; refractory recycling; and electronics/plating.