SEPARATION METHOD OF DIAMOND-BEARING MATERIALS AND DEVICE FOR REALISATION THEREOF Russian patent published in 2009 - IPC B07C5/346 B03B13/06 G01N23/00 

FIELD: mining.

SUBSTANCE: separation method of diamond-bearing mixtures of minerals involves continuous supply of a mixture of minerals, which contains mineral particles with various atomic numbers, to detection area, mineral particles irradiation with a collimated beam of the primary penetrating radiation of the specified cross-section, recording of the secondary penetrating radiation resulting from diffusion of the primary radiation with mineral particles in the detection area, as well as resulting from the interaction of the primary radiation with the diffusing screen made from the material with low atomic number independently and simultaneously in upper and lower areas of the space relative to the axis of the primary penetrating radiation flow at spatial angles of 0.1-2.0 steradian, which are located on the radiation-free side relative to the mineral particles in the detection area. Recorded secondary penetrating radiation is converted to two electric signals corresponding to the radiation diffused to the upper and to the lower space areas. Each of electric signals is compared independently to discrimination level and two rectangular-shaped impulses are formed. The particle is considered to be a useful mineral if that particle passes through the detection area and rectangular-shaped impulses are overlapped in time. The method is realised by means of the device activating the transporting mechanism intended for transporting the material through the analysis zone, the collimated penetrating radiation source, the diffusing screen, the penetrating radiation detector located on the side opposite to the falling primary flow of the penetrating radiation, detector signal amplifier, amplitude discriminator, and useful mineral cut-off point actuator. The transporting mechanism is made with the possibility of supplying the material in a continuous mode. To the device there added is the second detector of the penetrating radiation, the second detector signal amplifier, the second amplitude discriminator, and "I" logic diagram. Penetrating radiation detectors are located above and below collimated penetrating radiation source. Inputs of amplitude discriminators are connected to outputs of detectors signals amplifiers, and outputs of amplitude discriminators are connected to inputs of "I" logic diagram, and input of "I" logic diagram is connected to the actuator control unit input.

EFFECT: increasing selectivity and efficiency of separation process.

3 cl, 5 dwg, 1 ex