Use of waste gypsum from hydrometallurgical plant for the recovery of nickel from a nickel slag by sulfurization

Nurse Chauke; Michel Kalenga Wa Kalenga; Willie Nheta

doi:10.7449/2018/MST_2018_1072_1080

Use of waste gypsum from hydrometallurgical plant for the recovery of nickel from a nickel slag by sulfurization

Metallurgy

University of Johannesburg

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

2 Citations (Scopus)

Abstract

Disposal of waste in the metallurgical industry has become a challenge. Heaps of gypsum from hydrometallurgical plants using sulphates media are growing and pose an environmental problem. The current investigation focuses on the use of disposed gypsum from hydrometallurgical plants for Nickel recovery from slag. Sulfurization tests were carried out at different temperatures ranging from 600 ⁰ C to 1250 ⁰ C. XRD, XRF, ICP-MS and SEM-EDS were used for characterization. A silica crucible was used as a container placed in a tube furnace under argon gas to enhance the reaction. Nickel and Copper content in the slag were 0.75 and 1.16% respectively. The major phases were fayalite, cuprospinnel and nickel oxide. Results showed that the recycling of gypsum from hydrometallurgical plants was beneficial and the increase in temperature favored to convert nickel oxide into sulphide. Peacks decomposition has proved a number of sulphides have formed. However, above 1100 ⁰ C the sulfurization decreased.

Original language	English
Title of host publication	Materials Science and Technology 2018, MS and T 2018
Publisher	Association for Iron and Steel Technology, AISTECH
Pages	1072-1080
Number of pages	9
ISBN (Electronic)	0873397681, 9780873397681
DOIs	https://doi.org/10.7449/2018/MST_2018_1072_1080
Publication status	Published - 2019
Event	Materials Science and Technology 2018, MS and T 2018 - Columbus, United States Duration: 14 Oct 2018 → 18 Oct 2018

Publication series

Name	Materials Science and Technology 2018, MS and T 2018

Conference

Conference	Materials Science and Technology 2018, MS and T 2018
Country/Territory	United States
City	Columbus
Period	14/10/18 → 18/10/18

UN SDGs

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

SDG 12 Responsible Consumption and Production

Keywords

CaSO
Slag
Sulfurization
Temperature

ASJC Scopus subject areas

Energy Engineering and Power Technology
Mechanics of Materials
Materials Science (miscellaneous)

Access to Document

10.7449/2018/MST_2018_1072_1080

Cite this

Chauke, N., Wa Kalenga, M. K., & Nheta, W. (2019). Use of waste gypsum from hydrometallurgical plant for the recovery of nickel from a nickel slag by sulfurization. In Materials Science and Technology 2018, MS and T 2018 (pp. 1072-1080). (Materials Science and Technology 2018, MS and T 2018). Association for Iron and Steel Technology, AISTECH. https://doi.org/10.7449/2018/MST_2018_1072_1080

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title = "Use of waste gypsum from hydrometallurgical plant for the recovery of nickel from a nickel slag by sulfurization",

abstract = " Disposal of waste in the metallurgical industry has become a challenge. Heaps of gypsum from hydrometallurgical plants using sulphates media are growing and pose an environmental problem. The current investigation focuses on the use of disposed gypsum from hydrometallurgical plants for Nickel recovery from slag. Sulfurization tests were carried out at different temperatures ranging from 600 0 C to 1250 0 C. XRD, XRF, ICP-MS and SEM-EDS were used for characterization. A silica crucible was used as a container placed in a tube furnace under argon gas to enhance the reaction. Nickel and Copper content in the slag were 0.75 and 1.16\% respectively. The major phases were fayalite, cuprospinnel and nickel oxide. Results showed that the recycling of gypsum from hydrometallurgical plants was beneficial and the increase in temperature favored to convert nickel oxide into sulphide. Peacks decomposition has proved a number of sulphides have formed. However, above 1100 0 C the sulfurization decreased.",

keywords = "CaSO, Slag, Sulfurization, Temperature",

author = "Nurse Chauke and \{Wa Kalenga\}, \{Michel Kalenga\} and Willie Nheta",

note = "Publisher Copyright: Copyright {\textcopyright} 2018 MS\&T18{\textregistered}; Materials Science and Technology 2018, MS and T 2018 ; Conference date: 14-10-2018 Through 18-10-2018",

year = "2019",

doi = "10.7449/2018/MST\_2018\_1072\_1080",

language = "English",

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pages = "1072--1080",

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Chauke, N, Wa Kalenga, MK & Nheta, W 2019, Use of waste gypsum from hydrometallurgical plant for the recovery of nickel from a nickel slag by sulfurization. in Materials Science and Technology 2018, MS and T 2018. Materials Science and Technology 2018, MS and T 2018, Association for Iron and Steel Technology, AISTECH, pp. 1072-1080, Materials Science and Technology 2018, MS and T 2018, Columbus, United States, 14/10/18. https://doi.org/10.7449/2018/MST_2018_1072_1080

Use of waste gypsum from hydrometallurgical plant for the recovery of nickel from a nickel slag by sulfurization. / Chauke, Nurse; Wa Kalenga, Michel Kalenga ; Nheta, Willie.
Materials Science and Technology 2018, MS and T 2018. Association for Iron and Steel Technology, AISTECH, 2019. p. 1072-1080 (Materials Science and Technology 2018, MS and T 2018).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Use of waste gypsum from hydrometallurgical plant for the recovery of nickel from a nickel slag by sulfurization

AU - Chauke, Nurse

AU - Wa Kalenga, Michel Kalenga

AU - Nheta, Willie

PY - 2019

Y1 - 2019

N2 - Disposal of waste in the metallurgical industry has become a challenge. Heaps of gypsum from hydrometallurgical plants using sulphates media are growing and pose an environmental problem. The current investigation focuses on the use of disposed gypsum from hydrometallurgical plants for Nickel recovery from slag. Sulfurization tests were carried out at different temperatures ranging from 600 0 C to 1250 0 C. XRD, XRF, ICP-MS and SEM-EDS were used for characterization. A silica crucible was used as a container placed in a tube furnace under argon gas to enhance the reaction. Nickel and Copper content in the slag were 0.75 and 1.16% respectively. The major phases were fayalite, cuprospinnel and nickel oxide. Results showed that the recycling of gypsum from hydrometallurgical plants was beneficial and the increase in temperature favored to convert nickel oxide into sulphide. Peacks decomposition has proved a number of sulphides have formed. However, above 1100 0 C the sulfurization decreased.

AB - Disposal of waste in the metallurgical industry has become a challenge. Heaps of gypsum from hydrometallurgical plants using sulphates media are growing and pose an environmental problem. The current investigation focuses on the use of disposed gypsum from hydrometallurgical plants for Nickel recovery from slag. Sulfurization tests were carried out at different temperatures ranging from 600 0 C to 1250 0 C. XRD, XRF, ICP-MS and SEM-EDS were used for characterization. A silica crucible was used as a container placed in a tube furnace under argon gas to enhance the reaction. Nickel and Copper content in the slag were 0.75 and 1.16% respectively. The major phases were fayalite, cuprospinnel and nickel oxide. Results showed that the recycling of gypsum from hydrometallurgical plants was beneficial and the increase in temperature favored to convert nickel oxide into sulphide. Peacks decomposition has proved a number of sulphides have formed. However, above 1100 0 C the sulfurization decreased.

KW - CaSO

KW - Slag

KW - Sulfurization

KW - Temperature

UR - https://www.scopus.com/pages/publications/85060258894

U2 - 10.7449/2018/MST_2018_1072_1080

DO - 10.7449/2018/MST_2018_1072_1080

M3 - Conference contribution

AN - SCOPUS:85060258894

T3 - Materials Science and Technology 2018, MS and T 2018

SP - 1072

EP - 1080

BT - Materials Science and Technology 2018, MS and T 2018

PB - Association for Iron and Steel Technology, AISTECH

T2 - Materials Science and Technology 2018, MS and T 2018

Y2 - 14 October 2018 through 18 October 2018

ER -

Use of waste gypsum from hydrometallurgical plant for the recovery of nickel from a nickel slag by sulfurization

Abstract

Publication series

Conference

UN SDGs

Keywords

ASJC Scopus subject areas

Access to Document

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