X-ray luminescence sorter LS-D-4-04N

Sorter LS-D-4-04N is designed for pre-final treatment of dry concentrate with grain size – 6 + 3 and – 3 + 1 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 an automated control rack (ACR).

Technical data
Material to be processedDry, dust-free, classified (contents of main class 85% minimum)
Material grain size fraction– 6 + 3 and -3 + 1 mm.
Material supply and transportation systemFlow type. 4 – stream type. Two stages of treatment with   vibrofeeder. 
Slope trays and vibratory feeder trays are divided into 4 streams (one stream is 24 mm wide) 
Only single layer supply of material to the analysis area is allowed.
Throughput (rated)
600 kg/h (– 6 + 3 mm); 
300 kg/h (– 3 + 1 mm);
X-ray:
number of X-ray tubes2 (one tube per each stage).
mode of radiationPulse type (pulse duration – 0.5 ms; pulse period – 4 ms).
anode voltage, anode current(33-2) kV max.; 330 mA max.
Detection:
Single-sided material luminescence detection. Analogue-to-Digital Processing System; operation both in amplitude-time mode and in special mode – increased selectivity using kinetic features of luminescence (extra selection effect is ensured by luminescent-absorption analysis mode).
luminescent signals’ receiversphotomultiplier tubes (PMT
number of receivers, detection channels8 (4 per each stage).
EjectionPneumatic, with compressed air, by means of solenoid-operated pneumatic valves. 4-channel stopping mechanism at each stage. Channel-by-channel ejection.
Recovery rate99% minimum
Yield per ejection (with maximum capacity):Max. 3.0 g (- 6 + 3 mm; – 3 + 1 mm)
AutomationChecking 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. Monitoring and control from the APCS of enrichment plant. 
Protection system against unauthorized access to SM, material only if special smart cards are available.
Electric power supply1 phase; (220±22) V; (50±1) Hz
Power consumption4 kVA max.
Flowrate of potable water to cool the tubesl/min minimum
Volumetric compressed air flowrate (0.4 MPa) at 10 cutoffs/sec0.6 m3/min minimum
Overall dimensions (L×W×H), mass:
SM1000×670×1970 mm, 550 kg;
ACR765×550×1745 mm, 230 kg
Operation Conditions:
Ambient air temperaturefrom + 10°С to + 35°С
Relative humidity (at ambient air temperature + 25°С)80% max
Protection against X-raysSpecially designed construction of the sorter totally protects against the X-ray. Each unit is being tested for safety.
Dimensional drawing
Installation drawing
Process diagram