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| Experimental Study on Improving Whitening of Muscovite |
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Received:March 18, 2023
Revised:March 26, 2023
Accepted:March 29, 2023
Published Online:July 10, 2023
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| DOI：doi：10.3969/j.issn.1007-7545.2023.08.013 |
| KeyWord:muscovite; iron pollution; acid leaching; redox reaction; whiteness |
| Author | Institution |
| DU Chang-yun |
武汉理工大学 资源与环境工程学院 |
| REN Liu-yi |
武汉理工大学 资源与环境工程学院 |
| YE Zi-qian |
武汉理工大学 |
| JIAO Wu-ji |
武汉理工大学 |
| FAN Chen-yu |
武汉理工大学 |
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| Abstract: |
| The iron pollution of muscovite after grinding seriously affects the product quality. Thiourea dioxide was introduced as a reducing agent for removing iron and brightening of muscovite, and the effects of chemical leaching and oxidation-reduction removal of iron on the whiteness of muscovite were systematically studied. The muscovite product with a whiteness of 70.300% can be obtained under the conditions including leaching agent of 9% oxalic acid solution, L/S of 3︰1, leaching temperature of 80 ℃, and leaching time of 40 minutes. Then, the muscovite product with a whiteness of 76.114% is obtained by oxidizing with the oxidant NaClO solution and under the conditions of reducing agent dosage of 6%, pH=12, reduction temperature of 60 ℃, and reduction time of 15 minutes, which meets the requirements of 75.000% whiteness of white mica for most high-end products. |
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