Экспериментальное изучение эффективности применения колеманита и улексита в процессе плавки металлургического кремния
Year: 2023
Type: article
Abstract: The article identifies the key sources of iron and boron impurities entering silicon metal in the conditions of industrial melting in saf. the x-ray fluorescence method was used to study impurity rocks in the composition of quartz, the main raw material for the production of silicon metal, and their visual classification was carried out. it has been established that the energy of secondary characteristic x-ray radiation (xri) for boron and iron contained in the feedstock is 3.1 and 6.3 kev, respectively. the relationship between the intensity of the xri pulses and the concentration of iron and boron impurities has been found. the peculiarities of the distribution of these elements between metallurgical phases (silicon metal, slag and gas phase) when used in the melting process with and without borate flux (colemanite) have been established. in industrial conditions, it was found that the transition coefficient of boron to silicon metal decreases with the use of borate flux from 76.3% to 58.36%. the transition of iron to silicon metal from the charge remains at the same level with a slight downward trend from 93.18% to 92.12%. this may be due to a reduction in the contact time of the slag accumulating on the substrate of the melt with liquid silicon metal. there is also a reduction in the consumption of charge materials when using colemanite from 6.07 to 5.635 t/t of silicon metal due to a reduction in the time periods for cleaning the melting bath from the viscous slag accumulated on the hearth.
Language: Russian
Subfield: Metals and Alloys
Field: Materials Science
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W7217588232