Study on Process Mineralogy of a Used Cathode of Carbon Block from Electrolytic Aluminum Factory
| Autor: | Liu Haiying, Wang Jinling, Shen Shifu, Luo Youfa |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Scanning electron microscope
Energy-dispersive X-ray spectroscopy Electrolytic aluminum Mineralogy chemistry.chemical_element Silicate chemistry.chemical_compound chemistry Aluminium Phase (matter) General Earth and Planetary Sciences Graphite Carbon Fluoride Used cathode of carbon block Process mineralogy General Environmental Science |
| Zdroj: | Procedia Environmental Sciences. 16:749-757 |
| ISSN: | 1878-0296 |
| DOI: | 10.1016/j.proenv.2012.10.102 |
| Popis: | In order to treat a used cathode of carbon block from electrolytic aluminum factory harmlessly, many modern measurements were utilized to study its mineralogy, including chemical analysis, Transmission electron microscopy(TEM), X-ray diffraction(XRD), Scanning electron microscopy(SEM) and energy dispersive spectroscopy(EDS). The main chemical compositions of the material are C, Na, F, Al, Fe, Ca and SiO2, in which the content of C is 58.56% and F 9.86%. Main minerals appear as graphite, NaF and Na3AlF6, among which fluoride do harm to environment more seriously. To illustrate the relationship of minerals and chemical compositions clearly, they are divided into carbon-rich phase, sodium-rich phase, aluminum -rich phase, calcium-rich phase, iron-rich phase and silicate sate-rich phase in this paper. The main components crystallize closely, such as graphite, fluoride and silicate salt and so on, and carbon-rich phase disseminates in the particle size of nanometer to micron. According to the results of the process mineralogy, it's impossible to obtain purer graphite just by physical methods. |
| Databáze: | OpenAIRE |
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