Products: X-ray luminescence sorters
LS-20-07 X-ray sorter
Dimensional Drawing
Installation Drawing
The LS-20-07 Sorter is designated for the enrichment of wet basic diamond ore with grain size - 50 + 20, - 20 + 10 and - 10 + 5 mm.

The sorter's operation concept is based on the use of diamonds' property of luminescent under X-ray impact and on the difference of those properties with diamonds and associate luminescent minerals. The following different analysis modes are implemented:

- with single-side placement of the X-ray tube and luminescent receivers relatively to the material flow;
- the mode conditionally labeled as «luminescent and absorption", when the X-ray tube and luminescent receptors are located on both sides of the material flow; herein, the effect of difference in X-ray absorption by diamonds and associate luminescent minerals is used;
- with two-side placement of the X-ray tubes in relation to the material flow and single-side placement of luminescent receivers; herein, luminescent excitation in enhanced, although, differently for diamonds and associate luminescent minerals due to different degree of X-ray absorption.

The sorter includes a sorting machine (SM) and an automated control rack (ACR).

Material to be processed Wet, clean from mud and sorted materials, classified (contents of main class 85% minimum)
Material grain size classes - 50 + 20 mm,
- 20 + 10 mm,
- 10 + 5 mm
Material feed and transportation system Continuous flow system, single-pass. Loading hopper (with a flange to connect to the mill's transportation system) - gravity feeder with automatically controlled slide valve - a shaping slope tray (300 mm wide) - adjustable outer divider plate (concentrate-tailing) - concentrate and tailing channels (with flanges to connect the relevant pipelines of the mill).
Only single layer feed of material to the analysis area is allowed.
Throuput rates 65 t/hr (- 50 + 20 mm)
33 t/hr (- 20 + 10 mm)
20 t/hr (- 10 + 5 mm)
number of tubes
mode of radiation
anode voltage
anode current
Two-side location of the tubes in relation to the material flow in the freefall chute, use depending on the analysis mode.
Pulse type (pulse length - 0.5 ms; pulse period - 4 ms).
35 kV max.
350 mA
Luminescent signals' receivers
number of receivers

detection channels
Single-sided material luminescent detection.
Photomultipliers (PHM)
4 - Each receiver is provided with an optical system to localize the detection area; so, the material flow is divided across the width to four detection areas.
Analogue-to-digital detection system; options include operation both in amplitude-time mode and in special mode, increased selectivity, using kinetic features for luminescent.
When the "luminescent/absorption" mode is applied, additional selection effect is provided. When the material flow is exposed on both sides simultaneously, both sensitivity and selectivity are ensured.
Ejection Pneumatic, with compressed air, by means of solenoid-operated pneumatic valves 5-channel splitter. The valves are actuated after their combination algorithm, depending on detection area, where the object was recorded.
Recovery 99% minimum
Outward flow of material per one edjection (with Throuput rate) 0.7 kg maximum (- 50 + 20 mm),
0.35 kg (- 20 + 10 mm),
0.25 kg (- 10 + 5 mm)
Extra option (supplied after a special order): Protection system against unauthorized access to SM, material
Checking of main systems prior to start of material feed and in the course of operation (material feed is stopped if fault is detected) Sensitivity Failure indication. Monitoring and control from the concentration mill's Automated Process Checking System
Only if special smart cards are available and by commissioning.
Electric power supply 380V ± 10%;
50 Hz±2%;
6 kVA
Flow rate for transportation water (0.015 MPa) 1.2 (m³/hr) max.
Flow rate for potable quality water to cool the tubes 6 l/min max.
Flow rate for potable quality water to wash the windows of photo receptors and tube collimators (0.3 MPa) 0.5 l/min max.
Average compressed air flow rate (0.6 MPa) 0.03 m³/min
Overall dimensions (LxWxH), mass:
2300×845×2300 mm;
1100 kg
765×555×1745 mm;
230 kg
Operation conditions:
ambient air temperature:
From + 10°С to + 35°С.
Relative humidity (at ambient air temperature + 25°С) SM - to 100%
ACR - to 80%