METHOD OF CONCENTRATION OF ZEOLITE-CONTAINING TUFFS Russian patent published in 2004 - IPC

FIELD: processing and concentrating finely-dispersed low-grade zeolite-containing tuffs for obtaining zeolite concentrates. SUBSTANCE: proposed method includes grinding of raw material, separation by sizes, removal of slime, electromagnetic separation, electrostatic separation and separation in heavy fluids. After electromagnetic separation, raw material is subjected to ultrasonic treatment at frequency of 20-22 kHz. Electromagnetic separation is performed in isodynamic field, after which heating-charging is performed at temperature of 80-100 C in presence of salicylic acid at concentration of (0,2-0,4)^*10^-3 kg/cu m. Electrostatic separation is performed at intensity of field of (2,7-4,0)^*10^-5 V/m. Process of separation in heavy fluids is performed in field of centrifugal forces. EFFECT: enhanced efficiency; possibility of obtaining content of zeolite mineral (clinoptilolite) to 80-90%. 3 cl, 1 dwg