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Vol.4 , No. 2, Publication Date: Jun. 9, 2017, Page: 18-22
, scanning electron microscopy (SEM). The results showed that under the same experimental conditions, microwave power had significant effects on K-feldspar characteristics. There was a clear change in peak shape when the power was 600W or higher. Potassium dissolution efficiency by microwave pretreatment of feldspar was similar to microwave digestion reaction process. The potassium dissolution efficiency was as high as 80% in microwave-assisted process under conditions such as: K-feldspar and phosphorite was 0.8:1, calcium phosphate and calcium fluoride mass ratio of 1:3, temperature 160°C, reaction time 150 min. Microwave-assisted extraction method was demonstrated to be an excellent alternative for short reaction time and higher extraction efficiency.&picture=http://www.aascit.org/aascit/decorators/img/journal/899.jpg)
| [1] | Jianhai Zhao, Tianjin Key Laboratory of Aquatic Science and Technology, School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin, China. |
| [2] | Jiao Meng, Tianjin Key Laboratory of Aquatic Science and Technology, School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin, China. |
| [3] | Chang Xu, Tianjin Key Laboratory of Aquatic Science and Technology, School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin, China. |
| [4] | Jingxing Zhao, Tianjin Key Laboratory of Aquatic Science and Technology, School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin, China. |
Extraction of potassium from K-feldspar under microwave-assisted at low temperature was studied in this paper. The mineralogical characteristics of raw K-feldspar and residues after microwave pre-treatment and reaction under different conditions were determined by X-ray diffraction (XRD), scanning electron microscopy (SEM). The results showed that under the same experimental conditions, microwave power had significant effects on K-feldspar characteristics. There was a clear change in peak shape when the power was 600W or higher. Potassium dissolution efficiency by microwave pretreatment of feldspar was similar to microwave digestion reaction process. The potassium dissolution efficiency was as high as 80% in microwave-assisted process under conditions such as: K-feldspar and phosphorite was 0.8:1, calcium phosphate and calcium fluoride mass ratio of 1:3, temperature 160°C, reaction time 150 min. Microwave-assisted extraction method was demonstrated to be an excellent alternative for short reaction time and higher extraction efficiency.
Keywords
Microwave, K-feldspar, Low Temperature, Potassium Extraction
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