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).
Technical data
| 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) |
| X-ray: | |
|---|---|
| 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 |
| Detection: | |
| 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 |
| Operation Conditions: | |
| 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. |
