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In this paper, the formulas of diffusion coefficient (D) and mass transfer coefficient (β) of boron in molten silicon were deduced. The diffusion coefficient of boron was determined to be 1.46×10−8 m2s−1 by the diffusion experiment at 1823K in the resistance furnace. The mass transfer process of boron between silicon and slag was described using the two-film theory and the mass transfer coefficient...
The boron removal from metallurgical grade silicon (MG-Si) was studied using a K2CO3-CaO-SiO2 molten slag refining technique. The variation trend of boron concentration in the refined MG-Si was obtained experimentally under different content of K2CO3 in a ternary slag and under different refining times. The results showed that the boron concentration in MG-Si was minimally reduced from 22 ppmw...
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