Solid State Recycling of Recyclable Aluminum Wastes with In-Process Microstructure Control

Aizawa, Tatsuhiko; Luangvaranunt, Tachai; Kondoh, Katsuyoshi

doi:10.2320/matertrans.43.315

Cited by 21 publications

(18 citation statements)

References 14 publications

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“…In conventional recycling method, there is no improvement of mechanical properties and large slag will generate from remelting process and solidification [25]. In addition, 20% of materials will be lost during remelting process, which cannot be avoided.…”

Section: Recycling Of Non-ferrous Metal Wastementioning

confidence: 99%

“…Recently, solid-state recycling method of non-ferrous metals like aluminum, copper, zinc, and their alloy chips has been introduced without the melting process to overcome the disadvantages of conventional method [25,26]. Therefore, scientists have discovered new types of engineering that include sustainable engineering and green engineering that are used to minimize adverse impact and maximize the benefit to economic, social and environmental [19,27].…”

Section: Recycling Of Non-ferrous Metal Wastementioning

confidence: 99%

“…Different percentages of fine polyethylene waste are used to produce plastic cement. The ranges of polyethylene used are 15,20,25,30,35,40, 50, 60 and 80% of the mixing materials with fixed water content of 25% [10].…”

Section: Polyethylene Waste Plastic Cementmentioning

confidence: 99%

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Sustainable Solid Waste Recycling

Jassim¹

2017

Skills Development for Sustainable Manufacturing

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Nowadays, overpopulation and rapid development of industries and lifestyle lead to an increase in the consumption of natural resources and reduction of their resource. On the other hand, humans have always produced waste and disposed it in some way, which influence the environment. Therefore, the increase in waste that was generated by the industrial factories and the human activities needs to be managed. For this reason, scientists have discovered new types of engineering that include sustainable engineering and green engineering to reduce energy and natural resource consumptions. The main goal of this chapter is to explain the main advantages of sustainable manufacturing process and their effects in minimizing or eliminating production and processing wastes through eco-efficient practices, and it encourages adopting new environmental technologies. Therefore, this chapter offers a short introduction about sustainability, sustainable manufacturing process, solid-state management, and two case studies that include experimental works for recycling plastic waste and nonferrous waste materials by using sustainable solid waste recycling process to reduce waste and eliminate its influence on the environment.

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Section: Recycling Of Non-ferrous Metal Wastementioning

confidence: 99%

Section: Recycling Of Non-ferrous Metal Wastementioning

confidence: 99%

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Sustainable Solid Waste Recycling

Jassim¹

2017

Skills Development for Sustainable Manufacturing

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“…For example, hot forged AZ91D magnesium alloy consolidated from its chips shows a UTS of 280 MPa, which is remarkably higher than the conventional wrought AZ91D. 11,12) This process also highly capable of producing copper, 10) aluminum 13,14) and magnesium alloys without causing harm to the environment. In applying this process to the mass production process in industries, however, high productive efficiency is required.…”

Section: Introductionmentioning

confidence: 99%

Environmentally Benign Fabricating Process of Magnesium Alloy by Cyclical Plastic Working in Solid-State

Kondoh

Aizawa

2003

Mater. Trans.

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Solid-state processing via cyclically plastic working to output the green compact has been developed to fabricate magnesium alloys with fine microstructures. The relationship between the energy consumption during the plastic working and the characteristics of hot extruded magnesium alloys was evaluated from the viewpoint of the environmentally benign process. The cyclical plastic working marks a significant advance in refining microstructures, such as matrix grain and silicon particles added to synthesize Mg 2 Si via solid-state reaction with magnesium. For example, the grain size of hot extruded AZ31 alloy is 3-15 mm, which is remarkably smaller than that with 20-80 mm in employing the cold compact without using such a plastic working. As a result of the grain refinement, AZ31 alloys reveal higher UTS of 330-355 MPa than the conventional alloys of 270 MPa. The energy consumption of the cyclical plastic working with 200 cycles is 10 kJg À1 to fabricate the billet consolidated by hot extrusion, when using a high-speed screw-driven press machine. This is less than 10% of the energy consumed by the conventional recycling process in re-melting wasted magnesium alloys (126 kJg À1 ). This process is highly capable of producing high performance magnesium alloys with a small energy consumption and is environment-friendly.

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“…In particular, upgrade recycling may be attained for scraps in manufacturing facilities such as machined chips because contamination of detrimental elements is less for scraps in manufacturing facilities. The solid state recycling [6][7][8][9][10][11][12] is one of promising candidates for upgrade recycling. In the solid state recycling, metal scraps are directly recycled by plastic deformation process such as hot extrusion.…”

Section: )mentioning

confidence: 99%