SEPARATION METHOD OF DIAMOND-CONTAINING MIXTURES OF MINERALS Russian patent published in 2015 - IPC B03B5/44 

FIELD: mining.

SUBSTANCE: separation method of diamond-containing mixtures of minerals by heat conducting properties comprises the supply of a separated mixture of minerals in the form of a monolayer flow of grains of a certain technological grain size to the surface of a moving conveyor belt impregnated with a low-melting substance, the contact heat transfer from the heater rotating upstream through the mineral grains to the surface of the conveyor belt, melting under the mineral grains with the high thermal conductivity of the low-melting substance, their fastening with the subsequent cooling of the low-melting substance. On the surface of the conveyor belt at its entire width longitudinal zigzag-shaped troughs are formed, which are filled for not more than one third of their height with a low-melting thermal-adhesive material. The heater is made in the form of a system of equal discs independently rotating upstream with narrow contact edges of a rounded shape and they are located vertically along the axes of the troughs, and the axes of rotation of which are made movable in the vertical direction independently from each other so that when tripping-over the disc with the contact edges on the mineral grains and melting the low-melting substance under them, they have the ability to rise and descend. As the low-melting thermal-adhesive material rosin is used. The narrow contact edges of the heater discs are made of silver and copper or alloys.

EFFECT: increase in the efficiency of separation of diamonds.

3 cl, 2 dwg