Portable sorter POLUS-M
Sorter POLUS-M is designed to treatment dry diamond concentrate with grain size – 8 + 6, – 6 + 3 and – 3 + 1 mm in the field in order to carry out geological exploration of diamond deposits.
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 + 6, – 6 + 3 and – 3 + 1 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%.
|Throughput (rated)||160 kg/h (– 8 + 6 mm) |
100 kg/h (– 6 + 3 mm)
50 kg/h (– 3 + 1 mm)
|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)||Max. 5.0 g (- 8 + 6 mm) |
2.2 grains (- 6 + 3 mm)
1.7 g (– 3 +1 mm)
|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, 65 kg (incl. SPTA and installation kit);|
|CRU||490×440×290 mm, 25 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.|