| Institute of Multipurpose Utilization of Mineral Resources, Chinese Academy of Geological Sciences | Host |
| Citation: |
Sui Lili, Ma Mingyang, Zhai Yuchun, Zhang Jun, Zhang Dajun. Kinetics of Alkaline Leaching Process of Extractiing Silicon from the Residue of Titanium Extraction with Ammonium Sulfate Roasting[J]. Multipurpose Utilization of Mineral Resources, 2022, (1): 142-145, 199. doi: 10.3969/j.issn.1000-6532.2022.01.018
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Kinetics of Alkaline Leaching Process of Extractiing Silicon from the Residue of Titanium Extraction with Ammonium Sulfate Roasting
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Abstract
There is a large amount of silicon in the filter residue after extracting titanium from the titanium slag roasted with ammonium sulfate. Kinetics of alkaline leaching process of extracting silicon from the residue of titanium extraction were investigated. The results show that the internal diffusion on the solid product layer is the rate-controlling step in the leaching process. According to the Arrhenius expression, the apparent activation energy for the alkaline leaching process is 28.91 kJ/mol. The kinetics equation can be expressed as 1+2(1-x)-3(1-x)2/3=4.8554exp[-28910/(RT)]•t.
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Keywords:
- Ammonium sulfate /
- Titanium slag /
- Silicon dioxide /
- Alkaline leaching kinetics
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References
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Sui Lili, Ma Mingyang, Zhai Yuchun, Zhang Jun, Zhang Dajun. Kinetics of Alkaline Leaching Process of Extractiing Silicon from the Residue of Titanium Extraction with Ammonium Sulfate Roasting[J]. Multipurpose Utilization of Mineral Resources, 2022, (1): 142-145, 199. doi: 10.3969/j.issn.1000-6532.2022.01.018
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Figure 1.
Relationship between SiO2 recovery rate and t at different stirring speed
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Figure 2.
Relationship between SiO2 recovery rate and t at different temperatures
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Figure 3.
Relationship between 1+2(1-x)-3(1-x)2/3 and t at different temperatures
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Figure 4.
Relationship between lnk and T-1
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Figure 5.
Relationship between SiO2 recovery rate and t under different mass ratios of water-to-ore
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Figure 6.
Relationship between 1+2(1-x)-3(1-x)2/3 and t under different mass ratios of water-to-ore
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Figure 7.
Relationship between SiO2 recovery rate and t under different the mass ratio of NaOH to the residue
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Figure 8.
Relationship between 1+2(1-x)-3(1-x)2/3 and t under different the mass ratio of NaOH to the residue