X-ray transmission sorter RGS-2
X-ray sorter RGS-2 is designed to enrich diamond material with grain size – 6 + 3mm in the diamond industry. It can operate as a pre-final treatment sorter at reduced throughput.
Principle of sorter operation is based on measurement of X-ray material absorption at two different X-ray radiation energies (dual X-ray energy absorptiometry). It allows separation of materials with different atomic (charge) number (or element number in Mendeleev Periodic Table), i.e. diamonds (Z=6) and rock (Zeff=12).
The primary advantage of RGS-2 over modern X-ray luminescent sorters is the possibility to identify and recover any diamonds from the material flow irrespective of their X-ray luminescence features (poor luminescent or not luminescent).
The sorter includes a sorting section (SS) and electronic section (ES) connected together.
Technical data
| Material to be processed | Dry, dust-free, classified (contents of main class 85% minimum) |
| Material grain size fraction | –6 +3 mm |
| Material supply and transportation system | Flow type, 4-stream, 1-stage with supply vibrofeeder. Optional installation of collectors (tanks) for concentrate and tailings. |
| Throughput | 1.2 t/h minimum (– 6 + 3 mm) |
| X-ray: | |
|---|---|
| number of X-ray tubes | Two (2) X-ray tubes, Mo and W, operating on low and high energy, respectively. |
| mode of radiation | Constant |
| anode voltage, anode current | 37 kV, 60 mA (Мо); 60 kV, 42 mА (W) |
| Detection: | Detection module is provided with two rows of X-ray sensitive rulers with cell pitch of 0.4 mm (for channels of low and high energies) |
| Ejection | Local, pneumatic (with compressed air) 16-channel stopping mechanism (4 valves per each stream) |
| Recovery rate | 98.5 % minimum |
| Yield per ejection (with maximum capacity) | 0.6 g |
| 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). Failure indication. |
| Electric power supply | 1 phase; (220±22) V; (50±1) Hz |
| Power consumption | 8 kVA max. |
| Flowrate of potable water to cool the tubes | 4 l/min minimum |
| Average compressed air flowrate (0.4 MPa) | 4 m³/min |
| Overall dimensions (L×W×H), mass: | |
| Sorting section (SS) | 2900×970×094 mm; 1185 kg |
| Electronic section (ES) | 1125×840×2150 mm; 290 kg |
| Operation Conditions: | |
| Ambient air temperature | from + 10°С to + 35°С |
| Relative humidity (at ambient air temperature + 25°С) | SS – up to 100% ES – up to 80% |
| Protection against X-rays | Specially designed construction of the sorter totally protects against the X-ray. Each unit is being tested for safety. |
