SIFTING METHOD Russian patent published in 1996 - IPC

FIELD: mining industry. SUBSTANCE: method of sifting includes separation and displacement of material along the sieve due to vibrational action on the sieve by periodically changed frequency and amplitude of oscillations resulting from periodical switching on the vibration drive at vibration frequency smaller than the minimal resonant frequency of sieve with material and switching off the vibration drive at vibration frequency larger than the maximal resonant frequency of sieve with material. EFFECT: enhanced efficiency of separating lump materials. 2 dwg