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.
|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)|
|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|
|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.|