METHOD OF LIQUID-PHASE SEPARATION OF MINERAL SLIM Russian patent published in 1995 - IPC

FIELD: environment protection. SUBSTANCE: saturated solution of the slim is prepared in one tank, the liquid being related to the solid as (2.0-2.7):1. The solution is then extensively mixed for 3.5 min and particles are separated in the field of centrifugal forces in two stages. At the first stage, hydrocyclone catches the particles of diameter more than 0.2 mm, the particles being dehydrated and dried. At the second stage, the particles smaller than 0.2 mm are separated in the field of centrifugal forces, and dehydrated. The liquid phase, containing mineral fine divided toxic particles, is floated to extract and remove them. The dehydrated and dried particles of 0.2 mm in sizes are used again for shot-blasters. The particles of less than 0.2 in sizes are used for construction. EFFECT: enhanced efficiency. 2 cl, 5 dwg