Magnesium and silicon recovery from chrysotile asbestos waste of the deposit Zhitikara, Kazakhstan
Abstract Waste generated during asbestos manufacturing contains substantial quantities of iron, nickel, magnesium, and silicon. The existing techniques for processing chrysotile-asbestos waste (CAW) cannot fully recover these elements. Therefore this paper presents a hydrometallurgical method for pr...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2024-12-01
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| Online Access: | https://doi.org/10.1038/s41598-024-83239-0 |
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| author | R. A. Shayakhmetova A. A. Mukhametzhanova D. N. Akbayeva A. Zh. Terlikbaeva P. A. Osipov A. M. Alimzhanova A. A. Zharmenov |
| author_facet | R. A. Shayakhmetova A. A. Mukhametzhanova D. N. Akbayeva A. Zh. Terlikbaeva P. A. Osipov A. M. Alimzhanova A. A. Zharmenov |
| author_sort | R. A. Shayakhmetova |
| collection | DOAJ |
| description | Abstract Waste generated during asbestos manufacturing contains substantial quantities of iron, nickel, magnesium, and silicon. The existing techniques for processing chrysotile-asbestos waste (CAW) cannot fully recover these elements. Therefore this paper presents a hydrometallurgical method for processing the CAW of the Zhitikara deposit in the Kostanay region of Kazakhstan. Batch reactors are used in both laboratory and pilot experiments, and initial trials are conducted in a recently constructed industrial Ti reactor at the Kostanay Minerals JSC plant in the Kostanay region of Zhitikara. The primary benefits of the industrial reactor include operation without excessively grinding the feedstock and creation of a pulp with enhanced filtration properties. A moderate agitation speed (10 rpm) helps ensure a consistent pulp density and prevent the production of silica gel. Optimal leaching conditions are determined as a fraction size of CAW between − 1.25 and 0.25 mm, hydrochloric acid concentration of 18 wt%, temperature of ~ 85–90 °C, pressure of 1 atmosphere, and duration of 2 h. An investigation of the process kinetics reveals that diffusion is the rate-controlling step. Further, the activation energies are determined to be 54.4 kJ.mol− 1, and the leaching rates of Mg, Fe, and Ni under these conditions are 96.0, 87.8, and 81.3%, respectively. Washing and recycling water enhances helps to increase the recovery of magnesium chloride. Implementing pilot-scale hydrometallurgical processing of CAW can effectively address environmental issues that pose a threat to human health and provide commercial advantages. |
| format | Article |
| id | doaj-art-6dd9aa74a4f1466d841c1c2ed4222287 |
| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj-art-6dd9aa74a4f1466d841c1c2ed42222872025-01-05T12:28:43ZengNature PortfolioScientific Reports2045-23222024-12-0114112210.1038/s41598-024-83239-0Magnesium and silicon recovery from chrysotile asbestos waste of the deposit Zhitikara, KazakhstanR. A. Shayakhmetova0A. A. Mukhametzhanova1D. N. Akbayeva2A. Zh. Terlikbaeva3P. A. Osipov4A. M. Alimzhanova5A. A. Zharmenov6Republican State Enterprise National Center for Complex Processing of Mineral Raw Materials of the Republic of Kazakhstan, RSE “NC CPMRM RK”Republican State Enterprise National Center for Complex Processing of Mineral Raw Materials of the Republic of Kazakhstan, RSE “NC CPMRM RK”al-Farabi Kazakh National UniversityRepublican State Enterprise National Center for Complex Processing of Mineral Raw Materials of the Republic of Kazakhstan, RSE “NC CPMRM RK”Republican State Enterprise National Center for Complex Processing of Mineral Raw Materials of the Republic of Kazakhstan, RSE “NC CPMRM RK”Republican State Enterprise National Center for Complex Processing of Mineral Raw Materials of the Republic of Kazakhstan, RSE “NC CPMRM RK”Republican State Enterprise National Center for Complex Processing of Mineral Raw Materials of the Republic of Kazakhstan, RSE “NC CPMRM RK”Abstract Waste generated during asbestos manufacturing contains substantial quantities of iron, nickel, magnesium, and silicon. The existing techniques for processing chrysotile-asbestos waste (CAW) cannot fully recover these elements. Therefore this paper presents a hydrometallurgical method for processing the CAW of the Zhitikara deposit in the Kostanay region of Kazakhstan. Batch reactors are used in both laboratory and pilot experiments, and initial trials are conducted in a recently constructed industrial Ti reactor at the Kostanay Minerals JSC plant in the Kostanay region of Zhitikara. The primary benefits of the industrial reactor include operation without excessively grinding the feedstock and creation of a pulp with enhanced filtration properties. A moderate agitation speed (10 rpm) helps ensure a consistent pulp density and prevent the production of silica gel. Optimal leaching conditions are determined as a fraction size of CAW between − 1.25 and 0.25 mm, hydrochloric acid concentration of 18 wt%, temperature of ~ 85–90 °C, pressure of 1 atmosphere, and duration of 2 h. An investigation of the process kinetics reveals that diffusion is the rate-controlling step. Further, the activation energies are determined to be 54.4 kJ.mol− 1, and the leaching rates of Mg, Fe, and Ni under these conditions are 96.0, 87.8, and 81.3%, respectively. Washing and recycling water enhances helps to increase the recovery of magnesium chloride. Implementing pilot-scale hydrometallurgical processing of CAW can effectively address environmental issues that pose a threat to human health and provide commercial advantages.https://doi.org/10.1038/s41598-024-83239-0Chrysotile asbestos waste (CAW)Hydrochloric acid leaching (HAL)Pilot scale experimentsBischofiteSilicaWaste utilization |
| spellingShingle | R. A. Shayakhmetova A. A. Mukhametzhanova D. N. Akbayeva A. Zh. Terlikbaeva P. A. Osipov A. M. Alimzhanova A. A. Zharmenov Magnesium and silicon recovery from chrysotile asbestos waste of the deposit Zhitikara, Kazakhstan Scientific Reports Chrysotile asbestos waste (CAW) Hydrochloric acid leaching (HAL) Pilot scale experiments Bischofite Silica Waste utilization |
| title | Magnesium and silicon recovery from chrysotile asbestos waste of the deposit Zhitikara, Kazakhstan |
| title_full | Magnesium and silicon recovery from chrysotile asbestos waste of the deposit Zhitikara, Kazakhstan |
| title_fullStr | Magnesium and silicon recovery from chrysotile asbestos waste of the deposit Zhitikara, Kazakhstan |
| title_full_unstemmed | Magnesium and silicon recovery from chrysotile asbestos waste of the deposit Zhitikara, Kazakhstan |
| title_short | Magnesium and silicon recovery from chrysotile asbestos waste of the deposit Zhitikara, Kazakhstan |
| title_sort | magnesium and silicon recovery from chrysotile asbestos waste of the deposit zhitikara kazakhstan |
| topic | Chrysotile asbestos waste (CAW) Hydrochloric acid leaching (HAL) Pilot scale experiments Bischofite Silica Waste utilization |
| url | https://doi.org/10.1038/s41598-024-83239-0 |
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