Portable sorter POLUS-M
Sorter POLUS-M is designed to treatment dry diamond concentrate with grain size
in the field in order to carry out geological exploration of diamond deposits. -8+5, -5+2, -2+1, - 1+0,5 mm
The sorter operation concept is based on the use of diamonds' property of luminescence under X-ray impact and on the difference of those properties with diamonds and associate luminescent minerals. The mode under reference term "luminiscence and absorption" when the X-ray tube and photo detectors are located on both sides of the material flow is implemented. The effect of difference in X-ray absorption by diamonds and associate luminescent minerals is used.
The sorter includes a sorting machine (SM) and control and registration unit (CRU).
Material to be processed Dry, dust-free, classified (contents of main class 85% minimum)
Material grain size fraction -8+5, -5+2, -2+1, -1+0.5 mm
Material supply and transportation system Flow type, 1-stream, 1-stage with vibrofeeder.
Only single layer feed of material to the analysis area is allowed, filling index of the tray is from 5 to 80%.
100 kg/h (-8+5)
50 kg/h (-5+2)
30 kg/h (-2+1) 15 kg/h (-1+0.5)
number of X-ray tubes 1
mode of radiation Pulse type (pulse duration – 400+20-40 µs; pulse period – 2.6±0.2 ms).
anode voltage, anode current 30 kV max.; 10 mA
Single-sided material luminescence detection.
Analogue-to-digital detection system; operation both in amplitude-time mode and in special mode - increased selectivity using kinetic features of luminescence (extra selection effect is ensured by fluorescent-absorption analysis mode).
luminescent signals' receivers
photomultiplier tubes (PMT)
number of detectors, detection channels 1
Ejection Mechanical type. Metal blade with solenoid drive
Recovery rate 98% minimum
Yield per ejection (with maximum capacity)
2.2 g (-8+5)
1.7 g (-5+2)
1 g (-2+1)
0.5 g (-1+0.5)
Automation Checking of main systems prior to start of material supply and in the course of operation (material supply is stopped if fault is detected). Sensitivity control. Failure indication.
Electric power supply 1 phase; (220±22) V; (50±1) Hz
Power consumption 300 VA max.
Cooling of the X-ray tube Air cooling
Overall dimensions (L×W×H), weigth: (stowage boxes not included)
SM 635×300×590 mm, 36.5 kg (incl. SPTA and installation kit);
CRU 490×440×290 mm, 15 kg
Ambient air temperature from + 5°С to + 45°С
Relative humidity (at ambient air temperature + 25°С) 80% max.
Protection against X-rays Specially designed construction of the sorter totally protects against the X-ray. Each unit is being tested for safety. Process diagram