Selective recovery of chromium from ferronickel slag via alkaline roasting followed by water leaching

Foquan Gu; Yuanbo Zhang; Zhiwei Peng; Zijian Su; Huimin Tang; Weiguang Tian; Guoshen Liang; Joonho Lee; Mingjun Rao; Guanghui Li; Tao Jiang

doi:10.1016/j.jhazmat.2019.04.002

Selective recovery of chromium from ferronickel slag via alkaline roasting followed by water leaching

Foquan Gu, Yuanbo Zhang, Zhiwei Peng, Zijian Su, Huimin Tang, Weiguang Tian, Guoshen Liang, Joonho Lee, Mingjun Rao, Guanghui Li, Tao Jiang

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

47 Citations (Scopus)

Abstract

Chromium was selectively recovered from ferronickel slag by roasting the slag with addition of Na₂O₂, followed by water leaching. The thermodynamic analysis revealed that in the presence of Na₂O₂ at appropriate temperatures, the Cr₂O₃ in the ferronickel slag can be converted to NaCrO₂, instead of Na₂CrO₄, which prevents the formation of highly toxic Cr (VI). The experimental results confirmed that under the optimal alkaline roasting and water leaching conditions of the mass ratio of ferronickel slag to Na₂O₂ of 1, roasting temperature of 600 °C, roasting time of 1 h, leaching temperature of 50 °C, leaching time of 1 h, and liquid-to-solid ratio of 10 mL/g, 92.33% of Cr was leached with 64.28% of Na and 11.16% of Si and only 0.06 wt % Cr was left in the leaching residue. The high leaching percentage of Cr was a result of the transformation of Cr₂O₃ in the ferronickel slag to NaCrO₂ with a loose structure during alkaline roasting that was beneficial to water dissolution. Compared to the traditional alkaline roasting process, the proposed more environmentally friendly method did not produce toxic Cr (VI) during recovery of chromium and the resulting residue has potential to be used as a good construction material.

Original language	English
Pages (from-to)	83-91
Number of pages	9
Journal	Journal of hazardous materials
Volume	374
DOIs	https://doi.org/10.1016/j.jhazmat.2019.04.002
Publication status	Published - 2019 Jul 15

Bibliographical note

Funding Information:
This work was partially supported by the National Natural Science Foundation of China under Grants 51774337, 51504297 and 51811530108, the Natural Science Foundation of Hunan Province, China, under Grant 2017JJ3383, the Key Laboratory for Solid Waste Management and Environment Safety (Tsinghua University) Open Fund under Grant SWMES2017-04, the Open Project of State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials under Grant 17kffk11, the Fundamental Research Funds for the Central Universities of Central South University under Grants 2018zzts220 and 2018zzts779, the Open Sharing Fund for the Large-Scale Instruments and Equipments of Central South University under Grant CSUZC201905, the Co-Innovation Center for Clean and Efficient Utilization of Strategic Metal Mineral Resources under Grant 2014-405, the Guangdong Guangqing Metal Technology Co. Ltd. under Grant 738010210, the Innovation-Driven Program of Central South University under Grant 2016CXS021, and the Shenghua Lieying Program of Central South University under Grant 502035001.

Funding Information:
This work was partially supported by the National Natural Science Foundation of China under Grants 51774337 , 51504297 and 51811530108 , the Natural Science Foundation of Hunan Province, China , under Grant 2017JJ3383 , the Key Laboratory for Solid Waste Management and Environment Safety (Tsinghua University) Open Fund under Grant SWMES2017-04 , the Open Project of State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials under Grant 17kffk11 , the Fundamental Research Funds for the Central Universities of Central South University under Grants 2018zzts220 and 2018zzts779 , the Open Sharing Fund for the Large-Scale Instruments and Equipments of Central South University under Grant CSUZC201905 , the Co-Innovation Center for Clean and Efficient Utilization of Strategic Metal Mineral Resources under Grant 2014-405 , the Guangdong Guangqing Metal Technology Co. Ltd. under Grant 738010210 , the Innovation-Driven Program of Central South University under Grant 2016CXS021 , and the Shenghua Lieying Program of Central South University under Grant 502035001 .

Publisher Copyright:
© 2019 Elsevier B.V.

Keywords

Alkaline roasting
Cr (III)
Ferronickel slag
Selective recovery
Water leaching

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.2019.04.002

Cite this

@article{1d702fee2d8746a0bd70acc5359a991f,

title = "Selective recovery of chromium from ferronickel slag via alkaline roasting followed by water leaching",

abstract = "Chromium was selectively recovered from ferronickel slag by roasting the slag with addition of Na2O2, followed by water leaching. The thermodynamic analysis revealed that in the presence of Na2O2 at appropriate temperatures, the Cr2O3 in the ferronickel slag can be converted to NaCrO2, instead of Na2CrO4, which prevents the formation of highly toxic Cr (VI). The experimental results confirmed that under the optimal alkaline roasting and water leaching conditions of the mass ratio of ferronickel slag to Na2O2 of 1, roasting temperature of 600 °C, roasting time of 1 h, leaching temperature of 50 °C, leaching time of 1 h, and liquid-to-solid ratio of 10 mL/g, 92.33% of Cr was leached with 64.28% of Na and 11.16% of Si and only 0.06 wt % Cr was left in the leaching residue. The high leaching percentage of Cr was a result of the transformation of Cr2O3 in the ferronickel slag to NaCrO2 with a loose structure during alkaline roasting that was beneficial to water dissolution. Compared to the traditional alkaline roasting process, the proposed more environmentally friendly method did not produce toxic Cr (VI) during recovery of chromium and the resulting residue has potential to be used as a good construction material.",

keywords = "Alkaline roasting, Cr (III), Ferronickel slag, Selective recovery, Water leaching",

author = "Foquan Gu and Yuanbo Zhang and Zhiwei Peng and Zijian Su and Huimin Tang and Weiguang Tian and Guoshen Liang and Joonho Lee and Mingjun Rao and Guanghui Li and Tao Jiang",

note = "Funding Information: This work was partially supported by the National Natural Science Foundation of China under Grants 51774337, 51504297 and 51811530108, the Natural Science Foundation of Hunan Province, China, under Grant 2017JJ3383, the Key Laboratory for Solid Waste Management and Environment Safety (Tsinghua University) Open Fund under Grant SWMES2017-04, the Open Project of State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials under Grant 17kffk11, the Fundamental Research Funds for the Central Universities of Central South University under Grants 2018zzts220 and 2018zzts779, the Open Sharing Fund for the Large-Scale Instruments and Equipments of Central South University under Grant CSUZC201905, the Co-Innovation Center for Clean and Efficient Utilization of Strategic Metal Mineral Resources under Grant 2014-405, the Guangdong Guangqing Metal Technology Co. Ltd. under Grant 738010210, the Innovation-Driven Program of Central South University under Grant 2016CXS021, and the Shenghua Lieying Program of Central South University under Grant 502035001. Funding Information: This work was partially supported by the National Natural Science Foundation of China under Grants 51774337 , 51504297 and 51811530108 , the Natural Science Foundation of Hunan Province, China , under Grant 2017JJ3383 , the Key Laboratory for Solid Waste Management and Environment Safety (Tsinghua University) Open Fund under Grant SWMES2017-04 , the Open Project of State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials under Grant 17kffk11 , the Fundamental Research Funds for the Central Universities of Central South University under Grants 2018zzts220 and 2018zzts779 , the Open Sharing Fund for the Large-Scale Instruments and Equipments of Central South University under Grant CSUZC201905 , the Co-Innovation Center for Clean and Efficient Utilization of Strategic Metal Mineral Resources under Grant 2014-405 , the Guangdong Guangqing Metal Technology Co. Ltd. under Grant 738010210 , the Innovation-Driven Program of Central South University under Grant 2016CXS021 , and the Shenghua Lieying Program of Central South University under Grant 502035001 . Publisher Copyright: {\textcopyright} 2019 Elsevier B.V.",

year = "2019",

month = jul,

day = "15",

doi = "10.1016/j.jhazmat.2019.04.002",

language = "English",

volume = "374",

pages = "83--91",

journal = "Journal of hazardous materials",

issn = "0304-3894",

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T1 - Selective recovery of chromium from ferronickel slag via alkaline roasting followed by water leaching

AU - Gu, Foquan

AU - Zhang, Yuanbo

AU - Peng, Zhiwei

AU - Su, Zijian

AU - Tang, Huimin

AU - Tian, Weiguang

AU - Liang, Guoshen

AU - Lee, Joonho

AU - Rao, Mingjun

AU - Li, Guanghui

AU - Jiang, Tao

N1 - Funding Information: This work was partially supported by the National Natural Science Foundation of China under Grants 51774337, 51504297 and 51811530108, the Natural Science Foundation of Hunan Province, China, under Grant 2017JJ3383, the Key Laboratory for Solid Waste Management and Environment Safety (Tsinghua University) Open Fund under Grant SWMES2017-04, the Open Project of State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials under Grant 17kffk11, the Fundamental Research Funds for the Central Universities of Central South University under Grants 2018zzts220 and 2018zzts779, the Open Sharing Fund for the Large-Scale Instruments and Equipments of Central South University under Grant CSUZC201905, the Co-Innovation Center for Clean and Efficient Utilization of Strategic Metal Mineral Resources under Grant 2014-405, the Guangdong Guangqing Metal Technology Co. Ltd. under Grant 738010210, the Innovation-Driven Program of Central South University under Grant 2016CXS021, and the Shenghua Lieying Program of Central South University under Grant 502035001. Funding Information: This work was partially supported by the National Natural Science Foundation of China under Grants 51774337 , 51504297 and 51811530108 , the Natural Science Foundation of Hunan Province, China , under Grant 2017JJ3383 , the Key Laboratory for Solid Waste Management and Environment Safety (Tsinghua University) Open Fund under Grant SWMES2017-04 , the Open Project of State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials under Grant 17kffk11 , the Fundamental Research Funds for the Central Universities of Central South University under Grants 2018zzts220 and 2018zzts779 , the Open Sharing Fund for the Large-Scale Instruments and Equipments of Central South University under Grant CSUZC201905 , the Co-Innovation Center for Clean and Efficient Utilization of Strategic Metal Mineral Resources under Grant 2014-405 , the Guangdong Guangqing Metal Technology Co. Ltd. under Grant 738010210 , the Innovation-Driven Program of Central South University under Grant 2016CXS021 , and the Shenghua Lieying Program of Central South University under Grant 502035001 . Publisher Copyright: © 2019 Elsevier B.V.

PY - 2019/7/15

Y1 - 2019/7/15

N2 - Chromium was selectively recovered from ferronickel slag by roasting the slag with addition of Na2O2, followed by water leaching. The thermodynamic analysis revealed that in the presence of Na2O2 at appropriate temperatures, the Cr2O3 in the ferronickel slag can be converted to NaCrO2, instead of Na2CrO4, which prevents the formation of highly toxic Cr (VI). The experimental results confirmed that under the optimal alkaline roasting and water leaching conditions of the mass ratio of ferronickel slag to Na2O2 of 1, roasting temperature of 600 °C, roasting time of 1 h, leaching temperature of 50 °C, leaching time of 1 h, and liquid-to-solid ratio of 10 mL/g, 92.33% of Cr was leached with 64.28% of Na and 11.16% of Si and only 0.06 wt % Cr was left in the leaching residue. The high leaching percentage of Cr was a result of the transformation of Cr2O3 in the ferronickel slag to NaCrO2 with a loose structure during alkaline roasting that was beneficial to water dissolution. Compared to the traditional alkaline roasting process, the proposed more environmentally friendly method did not produce toxic Cr (VI) during recovery of chromium and the resulting residue has potential to be used as a good construction material.

AB - Chromium was selectively recovered from ferronickel slag by roasting the slag with addition of Na2O2, followed by water leaching. The thermodynamic analysis revealed that in the presence of Na2O2 at appropriate temperatures, the Cr2O3 in the ferronickel slag can be converted to NaCrO2, instead of Na2CrO4, which prevents the formation of highly toxic Cr (VI). The experimental results confirmed that under the optimal alkaline roasting and water leaching conditions of the mass ratio of ferronickel slag to Na2O2 of 1, roasting temperature of 600 °C, roasting time of 1 h, leaching temperature of 50 °C, leaching time of 1 h, and liquid-to-solid ratio of 10 mL/g, 92.33% of Cr was leached with 64.28% of Na and 11.16% of Si and only 0.06 wt % Cr was left in the leaching residue. The high leaching percentage of Cr was a result of the transformation of Cr2O3 in the ferronickel slag to NaCrO2 with a loose structure during alkaline roasting that was beneficial to water dissolution. Compared to the traditional alkaline roasting process, the proposed more environmentally friendly method did not produce toxic Cr (VI) during recovery of chromium and the resulting residue has potential to be used as a good construction material.

KW - Alkaline roasting

KW - Cr (III)

KW - Ferronickel slag

KW - Selective recovery

KW - Water leaching

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U2 - 10.1016/j.jhazmat.2019.04.002

DO - 10.1016/j.jhazmat.2019.04.002

M3 - Article

C2 - 30981016

AN - SCOPUS:85064157778

SN - 0304-3894

VL - 374

SP - 83

EP - 91

JO - Journal of hazardous materials

JF - Journal of hazardous materials

ER -

Selective recovery of chromium from ferronickel slag via alkaline roasting followed by water leaching

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

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