A Recycling Process for Dezincing Steel Scrap PDF Download
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Author:
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ISBN:
Category :
Languages : en
Pages : 14
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Book Description
In response to the several-fold increase in consumption of galvanized steel in the last decade and the problems associated with refurnacing larger quantities of galvanized steel scrap, a process is being developed to separate and recover the steel and zinc from galvanized ferrous scrap. The zinc is dissolved from the scrap in hot caustic using anodic assistance and is electrowon as dendritic powder. The process is effective for zinc, lead, aluminum, and cadmium removal on loose and baled scrap and on all types of galvanized steel. The process has been pilot tested for batch treatment of 1,000 tons of mostly baled scrap. A pilot plant to continuously treat loose scrap is under construction. Use of degalvanized steel scrap decreases raw materials and environmental compliance costs to steel- and iron-makers, may enable integrated steel producers to recycle furnace dusts to the sinter plant, and may enable EAF production of flat products without use of DRI or pig iron. Recycling the components of galvanized steel scrap saves primary energy, decreases zinc imports, and adds value to the scrap.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 14
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Book Description
In response to the several-fold increase in consumption of galvanized steel in the last decade and the problems associated with refurnacing larger quantities of galvanized steel scrap, a process is being developed to separate and recover the steel and zinc from galvanized ferrous scrap. The zinc is dissolved from the scrap in hot caustic using anodic assistance and is electrowon as dendritic powder. The process is effective for zinc, lead, aluminum, and cadmium removal on loose and baled scrap and on all types of galvanized steel. The process has been pilot tested for batch treatment of 1,000 tons of mostly baled scrap. A pilot plant to continuously treat loose scrap is under construction. Use of degalvanized steel scrap decreases raw materials and environmental compliance costs to steel- and iron-makers, may enable integrated steel producers to recycle furnace dusts to the sinter plant, and may enable EAF production of flat products without use of DRI or pig iron. Recycling the components of galvanized steel scrap saves primary energy, decreases zinc imports, and adds value to the scrap.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 14
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 14
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Book Description
In response to the worldwide increase in consumption of galvanized steel for automobiles in the last fifteen years, and the increased cost of environmental compliance associated with remelting larger quantities of galvanized steel scrap, a process is being developed to separate and recover the steel and zinc from galvanized ferrous scrap. The zinc is dissolved from the scrap in hot caustic using anodic assistance and is recovered electrolytically as dendritic powder. The designed ferrous scrap is rinsed and used directly. The process is effective for zinc, lead, and aluminum removal on loose and baled scrap and on all types of galvanized steel. The process has been pilot tested in Hamilton, Ontario for batch treatment of 900 tonnes of mostly baled scrap. A pilot plant in East Chicago, Indiana has designed in a continuous process mode 900 tonnes of loose stamping plant scrap; this scrap typically has residual zinc below 0.1% and sodium dragout below 0.001%. This paper reviews pilot plant performance and the economics of recycling galvanized steel and recovering zinc using a caustic process.
Author: S.R. Ramachandra Rao
Publisher: Elsevier
ISBN: 0080463207
Category : Science
Languages : en
Pages : 581
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Book Description
Resource recovery and recycling from millions of tons of wastes produced from industrial activities is a continuing challenge for environmental engineers and researchers. Demand for conservation of resources, reduction in the quantity of waste and sustainable development with environmental control has been growing in every part of the world. Resource Recovery and Recycling from Metallurgical Wastes brings together the currently used techniques of waste processing and recycling, their applications with practical examples and economic potentials of the processes. Emphasis is on resource recovery by appropriate treatment and techniques. Material on the subject is scatterend in waste management and environmental related journals, conference volumes and government departmental technical reports. This work serves as a source book of information and as an educational technical reference for practicing scientists and engineers, as well as for students. Describes the currently used and potential techniques for the recovery of valuable resources from mineral and metallurgical wastes Discusses the applications to specific kinds of wastes with examples from current practices, as well as eht economics of the processes Presents recent and emerging technologies of potentials in metal recycling and by-product utilization
Author: Christina Meskers
Publisher: Elsevier
ISBN: 0323860133
Category : Technology & Engineering
Languages : en
Pages : 758
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Book Description
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
Author: Sehliselo Ndlovu
Publisher: CRC Press
ISBN: 1351649930
Category : Technology & Engineering
Languages : en
Pages : 466
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Book Description
Increasingly stringent environmental regulations and industry adoption of waste minimization guidelines have thus, stimulated the need for the development of recycling and reuse options for metal related waste. This book, therefore, gives an overview of the waste generation, recycle and reuse along the mining, beneficiation, extraction, manufacturing and post-consumer value chain. This book reviews current status and future trends in the recycling and reuse of mineral and metal waste and also details the policy and legislation regarding the waste management, health and environmental impacts in the mining, beneficiation, metal extraction and manufacturing processes. This book is a useful reference for engineers and researchers in industry, policymakers and legislators in governance, and academics on the current status and future trends in the recycling and reuse of mineral and metal waste. Some of the key features of the book are as follows: Holistic approach to waste generation, recycling and reuse along the minerals and metals extraction. Detailed overview of metallurgical waste generation. Practical examples with complete flow sheets, techniques and interventions on waste management. Integrates the technical issues related to efficient resources utilization with the policy and regulatory framework. Novel approach to addressing future commodity shortages.
Author: Scott F. Sibley
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 220
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Book Description
Author:
Publisher:
ISBN:
Category : Recycling industry
Languages : en
Pages : 36
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Book Description
Author: Charles L. Kusik
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 196
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 18
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Book Description
Innovative, cost-effective technologies that have a positive life-cycle environmental impact and yield marketable products are needed to meet the challenges of the recycling industry. Four materials-recovery technologies that are being developed at Argonne National Laboratory in cooperation with industrial partners are described in this paper: (1) dezincing of galvanized steel scrap; (2) material recovery from auto-shredder residue; (3) high-value-plastics recovery from obsolete appliances; and (4) aluminum salt cake recycling. These technologies are expected to be applicable to the production of low-cost, high-quality raw materials from a wide range of waste streams.
