METHOD OF SORTING-OUT SLAGS OF SILICON PRODUCTION PROCESS Russian patent published in 2003 - IPC

FIELD: metallurgy; sorting-out slags and extraction of additional silicon. SUBSTANCE: method includes separation of slags by roentgenoradiometric method through characteristic radiation of strontium and/or calcium; separation is performed by the following separation algorithm: η = N_Sr+K₁N_Ca/N_qc+K₂N_Sr, where η - is magnitude of separation sign; N_Sr is number of roentgen quanta corresponding to characteristic radiation of strontium; N_Ca is number of roentgen quanta corresponding to characteristic radiation of calcium; N_qc is scattered radiation of primary roentgen radiator; K₁K₂ are spectral coefficients selected from calcium-to-strontium ratio and determined experimentally; K_i corresponds to N_Sr/N_Ca ratio (for pure slag) and is set within (0.0-10.0) and K₂ is selected from N_Sr/N_qc ratio (for pure silicon) and is set within (0.1- 0.5). EFFECT: enhanced ecology.