A soft-solution process for recovering rare metals from metal/alloy-wastes by grinding and washing with water

Kibu Chiyo; Shu Saeki; Yasumitsu Tanaka; Junya Kano; Fumio Saito

doi:10.1016/j.jhazmat.2006.02.058

A soft-solution process for recovering rare metals from metal/alloy-wastes by grinding and washing with water

Kibu Chiyo, Shu Saeki, Yasumitsu Tanaka, Junya Kano, Fumio Saito

Center for Mineral Processing and Metallurgy (CMPM)

Research output: Contribution to journal › Article › peer-review

18 Citations (Scopus)

Abstract

We have developed a novel process for recovering metals from alloy-wastes by using a mechanochemical (MC) reaction. The process consists of co-grinding both alloy and polyvinyl chloride (PVC) samples, followed by washing with water and filtration. The co-grinding of the wastes causes a solid-state MC reaction to form metal chlorides and hydrocarbon in the product. The former products are soluble in water, so they can be recovered from the wastes by washing with water, followed by filtration. The PVC waste plays a significant role as a chlorine source in the MC reaction. After filtration, the solid residue can be used as a fuel, due to the absence of chlorine in the product, and the filtrate is subjected to hydrometallurgical process to extract metals from the solution.

Original language	English
Pages (from-to)	438-442
Number of pages	5
Journal	Journal of Hazardous Materials
Volume	139
Issue number	3
DOIs	https://doi.org/10.1016/j.jhazmat.2006.02.058
Publication status	Published - 2007 Jan 31

Keywords

Dechlorination
Mechanochemical reaction
Rare metals
Recycling

ASJC Scopus subject areas

Environmental Engineering
Environmental Chemistry
Waste Management and Disposal
Pollution
Health, Toxicology and Mutagenesis

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10.1016/j.jhazmat.2006.02.058

Cite this

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title = "A soft-solution process for recovering rare metals from metal/alloy-wastes by grinding and washing with water",

abstract = "We have developed a novel process for recovering metals from alloy-wastes by using a mechanochemical (MC) reaction. The process consists of co-grinding both alloy and polyvinyl chloride (PVC) samples, followed by washing with water and filtration. The co-grinding of the wastes causes a solid-state MC reaction to form metal chlorides and hydrocarbon in the product. The former products are soluble in water, so they can be recovered from the wastes by washing with water, followed by filtration. The PVC waste plays a significant role as a chlorine source in the MC reaction. After filtration, the solid residue can be used as a fuel, due to the absence of chlorine in the product, and the filtrate is subjected to hydrometallurgical process to extract metals from the solution.",

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T1 - A soft-solution process for recovering rare metals from metal/alloy-wastes by grinding and washing with water

AU - Chiyo, Kibu

AU - Saeki, Shu

AU - Tanaka, Yasumitsu

AU - Kano, Junya

AU - Saito, Fumio

PY - 2007/1/31

Y1 - 2007/1/31

N2 - We have developed a novel process for recovering metals from alloy-wastes by using a mechanochemical (MC) reaction. The process consists of co-grinding both alloy and polyvinyl chloride (PVC) samples, followed by washing with water and filtration. The co-grinding of the wastes causes a solid-state MC reaction to form metal chlorides and hydrocarbon in the product. The former products are soluble in water, so they can be recovered from the wastes by washing with water, followed by filtration. The PVC waste plays a significant role as a chlorine source in the MC reaction. After filtration, the solid residue can be used as a fuel, due to the absence of chlorine in the product, and the filtrate is subjected to hydrometallurgical process to extract metals from the solution.

AB - We have developed a novel process for recovering metals from alloy-wastes by using a mechanochemical (MC) reaction. The process consists of co-grinding both alloy and polyvinyl chloride (PVC) samples, followed by washing with water and filtration. The co-grinding of the wastes causes a solid-state MC reaction to form metal chlorides and hydrocarbon in the product. The former products are soluble in water, so they can be recovered from the wastes by washing with water, followed by filtration. The PVC waste plays a significant role as a chlorine source in the MC reaction. After filtration, the solid residue can be used as a fuel, due to the absence of chlorine in the product, and the filtrate is subjected to hydrometallurgical process to extract metals from the solution.

KW - Dechlorination

KW - Mechanochemical reaction

KW - Rare metals

KW - Recycling

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A soft-solution process for recovering rare metals from metal/alloy-wastes by grinding and washing with water

Abstract

Keywords

ASJC Scopus subject areas

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