X-ray luminescence sorter LS-OD-6

Sorter LS-OD-6 is designed for pre-final and final treatment of dry concentrate with grain size – 5 + 2 and – 2 + 1.

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– 5 + 2 and – 2 + 1 mm

Material supply and transportation system

Grain-by-grain, 4-stream, one-stage type with feeding vibrofeeder and stretching vibrofeeder.  
Optional installation of collectors (tanks) for concentrate and tailings.
Throughput50 kg/h max. (– 5 + 2 mm) 
12.5 kg/h (– 2 + 1 mm)
X-ray:
number of X-ray tubes1
mode of radiationPulse type (pulse duration – 0.5 ms; pulse period – 4 ms)
anode voltage, anode current(33-2) kV max.; (330±10) mA
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). 
Higher sensitivity and selectivity is provided than with LS-OD-4-04N sorter.
luminescent signals’ receiversphotomultiplier tubes (PMT)
number of detectors, detection channels4 (one per each channel)
EjectionPneumatic, with compressed air, by means of solenoid-operated pneumatic valves. 
4-channel stopping mechanism. Channel-by-channel ejection.
Recovery rate98% minimum (– 5 + 2 mm) 
96% (– 2 + 1 mm)
Yield per 10 ejections  (at maximum capacity)Max. 30 grains (- 5 + 2 mm) 
45 grains (- 2 + 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 consumption2 kVA max.
Volumentric flowrate of potable water to cool the tubes6 l/min minimum
Volumetric compressed air flowrate (0.4 MPa) at 10 splits/sec0.6 m3/min minimum
Overall dimensions (L×W×H), weigth:
SM1190×730×1690 mm, 700 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