Sulfuric acid leaching for capturing value from copper rich converter slag

Muhammad Khalid; Joseph Hamuyuni; Vivek Agarwal; Jouni Pihlasalo; Mika Haapalainen; Mari Lundström

doi:10.1016/j.jclepro.2019.01.083

Sulfuric acid leaching for capturing value from copper rich converter slag

Muhammad Khalid, Joseph Hamuyuni, Vivek Agarwal, Jouni Pihlasalo, Mika Haapalainen, Mari Lundström

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Abstract

In this research, a hydrometallurgical method for recovery of copper from copper rich converter slag is investigated. The main copper containing phases of the slag are cuprite (Cu2O), delafossite (CuFeO2) and metallic copper (Cu). The study investigates the effect of particle size, temperature, acid concentration, agitation and leaching time under oxidizing conditions. The results showed that at optimized conditions (40 °C, 2 M H2SO4, 60 min leaching time, 0.26 kW/m3 mixing power, and 2000 mL/min oxygen flow rate), ca. 100% extraction of copper from slag into the solution was obtained. X-ray diffraction (XRD) analysis consolidated the experimental results by confirming that no Cu containing phases were present in the leach residue. Results also showed that temperature ≤40 °C had the larger influence on Cu and Fe yield, whereas higher temperature (>40 °C) favored Ni and Zn dissolution. The acid consumption of the optimized leaching process was found to be 23.7 mol of H2SO4 per kg of copper.

Original language	English
Pages (from-to)	1005-1013
Number of pages	9
Journal	Journal of Cleaner Production
Volume	215
DOIs	https://doi.org/10.1016/j.jclepro.2019.01.083
Publication status	Published - 1 Apr 2019
MoE publication type	A1 Journal article-refereed

Keywords

Circular economy
Copper recovery
Copper rich slag
Leaching
Side streams
LOSSES
RECOVERY
REMOVAL
IRON

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.jclepro.2019.01.083Licence: CC BY

CHEM-Khalid et al-Sulfuric acid-2019-JourCleProdFinal published version, 2.64 MBLicence: CC BY

Cite this

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title = "Sulfuric acid leaching for capturing value from copper rich converter slag",

abstract = "In this research, a hydrometallurgical method for recovery of copper from copper rich converter slag is investigated. The main copper containing phases of the slag are cuprite (Cu2O), delafossite (CuFeO2) and metallic copper (Cu). The study investigates the effect of particle size, temperature, acid concentration, agitation and leaching time under oxidizing conditions. The results showed that at optimized conditions (40 °C, 2 M H2SO4, 60 min leaching time, 0.26 kW/m3 mixing power, and 2000 mL/min oxygen flow rate), ca. 100% extraction of copper from slag into the solution was obtained. X-ray diffraction (XRD) analysis consolidated the experimental results by confirming that no Cu containing phases were present in the leach residue. Results also showed that temperature ≤40 °C had the larger influence on Cu and Fe yield, whereas higher temperature (>40 °C) favored Ni and Zn dissolution. The acid consumption of the optimized leaching process was found to be 23.7 mol of H2SO4 per kg of copper.",

keywords = "Circular economy, Copper recovery, Copper rich slag, Leaching, Side streams, LOSSES, RECOVERY, REMOVAL, IRON",

author = "Muhammad Khalid and Joseph Hamuyuni and Vivek Agarwal and Jouni Pihlasalo and Mika Haapalainen and Mari Lundstr{\"o}m",

year = "2019",

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day = "1",

doi = "10.1016/j.jclepro.2019.01.083",

language = "English",

volume = "215",

pages = "1005--1013",

journal = "Journal of Cleaner Production",

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T1 - Sulfuric acid leaching for capturing value from copper rich converter slag

AU - Khalid, Muhammad

AU - Hamuyuni, Joseph

AU - Agarwal, Vivek

AU - Pihlasalo, Jouni

AU - Haapalainen, Mika

AU - Lundström, Mari

PY - 2019/4/1

Y1 - 2019/4/1

N2 - In this research, a hydrometallurgical method for recovery of copper from copper rich converter slag is investigated. The main copper containing phases of the slag are cuprite (Cu2O), delafossite (CuFeO2) and metallic copper (Cu). The study investigates the effect of particle size, temperature, acid concentration, agitation and leaching time under oxidizing conditions. The results showed that at optimized conditions (40 °C, 2 M H2SO4, 60 min leaching time, 0.26 kW/m3 mixing power, and 2000 mL/min oxygen flow rate), ca. 100% extraction of copper from slag into the solution was obtained. X-ray diffraction (XRD) analysis consolidated the experimental results by confirming that no Cu containing phases were present in the leach residue. Results also showed that temperature ≤40 °C had the larger influence on Cu and Fe yield, whereas higher temperature (>40 °C) favored Ni and Zn dissolution. The acid consumption of the optimized leaching process was found to be 23.7 mol of H2SO4 per kg of copper.

AB - In this research, a hydrometallurgical method for recovery of copper from copper rich converter slag is investigated. The main copper containing phases of the slag are cuprite (Cu2O), delafossite (CuFeO2) and metallic copper (Cu). The study investigates the effect of particle size, temperature, acid concentration, agitation and leaching time under oxidizing conditions. The results showed that at optimized conditions (40 °C, 2 M H2SO4, 60 min leaching time, 0.26 kW/m3 mixing power, and 2000 mL/min oxygen flow rate), ca. 100% extraction of copper from slag into the solution was obtained. X-ray diffraction (XRD) analysis consolidated the experimental results by confirming that no Cu containing phases were present in the leach residue. Results also showed that temperature ≤40 °C had the larger influence on Cu and Fe yield, whereas higher temperature (>40 °C) favored Ni and Zn dissolution. The acid consumption of the optimized leaching process was found to be 23.7 mol of H2SO4 per kg of copper.

KW - Circular economy

KW - Copper recovery

KW - Copper rich slag

KW - Leaching

KW - Side streams

KW - LOSSES

KW - RECOVERY

KW - REMOVAL

KW - IRON

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DO - 10.1016/j.jclepro.2019.01.083

M3 - Article

SN - 0959-6526

VL - 215

SP - 1005

EP - 1013

JO - Journal of Cleaner Production

JF - Journal of Cleaner Production

ER -

Sulfuric acid leaching for capturing value from copper rich converter slag

Abstract

Keywords

UN SDGs

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CMEco: Circular Metal Ecosystem

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Sulfuric acid leaching for capturing value from copper rich converter slag

Abstract

Keywords

UN SDGs

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CMEco: Circular Metal Ecosystem

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Raw Materials Research Infrastructure

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