Deep Processing of Dump Slag from the Copper-Nickel Industry
This work proposes an environmentally safe and economically feasible method of waste copper-nickel production slag utilization (Kola Mining-Metallurgical Company, Nornickel, Kola Peninsula, Russia). This process involves the decomposition of slag by diluted solutions of sulfuric acid (7–10 wt.% H2SO...
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ftmdpi:oai:mdpi.com:/2075-4701/13/7/1265/ 2023-08-20T04:07:47+02:00 Deep Processing of Dump Slag from the Copper-Nickel Industry Alexandr G. Kasikov Elena A. Shchelokova Olga A. Timoshchik Vasilij V. Semushin 2023-07-13 application/pdf https://doi.org/10.3390/met13071265 EN eng Multidisciplinary Digital Publishing Institute https://dx.doi.org/10.3390/met13071265 https://creativecommons.org/licenses/by/4.0/ Metals; Volume 13; Issue 7; Pages: 1265 utilization slag sulfuric acid dehydration silica ferric oxide Text 2023 ftmdpi https://doi.org/10.3390/met13071265 2023-08-01T10:51:34Z This work proposes an environmentally safe and economically feasible method of waste copper-nickel production slag utilization (Kola Mining-Metallurgical Company, Nornickel, Kola Peninsula, Russia). This process involves the decomposition of slag by diluted solutions of sulfuric acid (7–10 wt.% H2SO4) with a transfer in a solution of more than 70% silicon, 77% iron and 78% magnesium, and a concentration of non-ferrous metals in the residue (~70%). Copper ions were used in the leaching stage to prevent the release of hydrogen sulfide into the working atmosphere. Dehydration of the solution, followed by washing of water-soluble sulphates from silica, was carried out to separate silica from the leaching solution. The dehydration temperature effect on the silica structural characteristics was determined. The possibility of recovering non-ferrous metals from solutions after silica extraction by precipitation, in the form of copper cementite, and the sum of nickel and cobalt sulfides, was evaluated. Pigment-grade iron dioxide, magnesium sulphate and aluminium hydroxide were obtained by dehydration of the solution after extraction of base metals, calcination and other operations. Sulfuric acid leaching resulted in the disclosure of sulfide grains encapsulated in ferrosilicate, which is a favorable factor for flotation. The depleted residue can be successfully used in the construction industry. Text kola peninsula MDPI Open Access Publishing Kola Peninsula Metals 13 7 1265 |
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MDPI Open Access Publishing |
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language |
English |
topic |
utilization slag sulfuric acid dehydration silica ferric oxide |
spellingShingle |
utilization slag sulfuric acid dehydration silica ferric oxide Alexandr G. Kasikov Elena A. Shchelokova Olga A. Timoshchik Vasilij V. Semushin Deep Processing of Dump Slag from the Copper-Nickel Industry |
topic_facet |
utilization slag sulfuric acid dehydration silica ferric oxide |
description |
This work proposes an environmentally safe and economically feasible method of waste copper-nickel production slag utilization (Kola Mining-Metallurgical Company, Nornickel, Kola Peninsula, Russia). This process involves the decomposition of slag by diluted solutions of sulfuric acid (7–10 wt.% H2SO4) with a transfer in a solution of more than 70% silicon, 77% iron and 78% magnesium, and a concentration of non-ferrous metals in the residue (~70%). Copper ions were used in the leaching stage to prevent the release of hydrogen sulfide into the working atmosphere. Dehydration of the solution, followed by washing of water-soluble sulphates from silica, was carried out to separate silica from the leaching solution. The dehydration temperature effect on the silica structural characteristics was determined. The possibility of recovering non-ferrous metals from solutions after silica extraction by precipitation, in the form of copper cementite, and the sum of nickel and cobalt sulfides, was evaluated. Pigment-grade iron dioxide, magnesium sulphate and aluminium hydroxide were obtained by dehydration of the solution after extraction of base metals, calcination and other operations. Sulfuric acid leaching resulted in the disclosure of sulfide grains encapsulated in ferrosilicate, which is a favorable factor for flotation. The depleted residue can be successfully used in the construction industry. |
format |
Text |
author |
Alexandr G. Kasikov Elena A. Shchelokova Olga A. Timoshchik Vasilij V. Semushin |
author_facet |
Alexandr G. Kasikov Elena A. Shchelokova Olga A. Timoshchik Vasilij V. Semushin |
author_sort |
Alexandr G. Kasikov |
title |
Deep Processing of Dump Slag from the Copper-Nickel Industry |
title_short |
Deep Processing of Dump Slag from the Copper-Nickel Industry |
title_full |
Deep Processing of Dump Slag from the Copper-Nickel Industry |
title_fullStr |
Deep Processing of Dump Slag from the Copper-Nickel Industry |
title_full_unstemmed |
Deep Processing of Dump Slag from the Copper-Nickel Industry |
title_sort |
deep processing of dump slag from the copper-nickel industry |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2023 |
url |
https://doi.org/10.3390/met13071265 |
geographic |
Kola Peninsula |
geographic_facet |
Kola Peninsula |
genre |
kola peninsula |
genre_facet |
kola peninsula |
op_source |
Metals; Volume 13; Issue 7; Pages: 1265 |
op_relation |
https://dx.doi.org/10.3390/met13071265 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/met13071265 |
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Metals |
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13 |
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7 |
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1265 |
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