APPLICATION OF STAGE CRUSHING IN GRAVITY ENRICHMENT OF TIN ORES AT SOLNECHNY MINING PLANT

Abstract

Research was carried out on the stage crushing of tin ore from Solnechny mining plant with a size class of -5.0+0.0 mm to a size class of -0.2+0.0 mm in order to identify overcrushing of the ore during crushing into a slurry size class of -0.071+0.0 mm. The work compares the use of a KID-100 cone inertial crusher and a Fritsch Pulverisette 13 disc mill. A comparative assessment is also given between stage crushing and single-stage crushing of tin ore to size class -0.2+0.0 mm. As a result of the conducted research, the advantage of stage crushing over single-stage crushing was proven: the yield in the -0.071+0.0 mm size class decreased from 79.3 to 58.3 %. The difference was also established when crushing ore with cone-type crushers and disk mills. When crushing tin ore of the -0.5+0.2 mm size class using a disk mill, compared to a cone-type crusher, the yield of crushed ore in the -0.071+0.0 mm size class decreased from 70.8 to 57.5 %.