Mining and Ore Processing

Mining Method

Sublevel Stoping – main levels 6x50m; sub-levels 3x25m

Ore Mining and Processing Plan

Crushing > Pre-concentration stage > Ore Beneficiation > Hydrometallurgy

Ore Material Transport Route

Gruncharitsa Mine > Elshitsa BP > KCM 2000 AD Smelter

Gruncharitsa Project Mining and Ore Processing

Underground Mining

Sublevel Stoping + Crushing to -25mm

Pre-concentration stage

XRF/UV separation

Ore Transport

Truck+Train to Elshitsa Beneficiation Plant

Ore Beneficiation

Gravity, sieving (-5mm), froth flotation, etc.

Scheelite Concentrate: 32 % WO3

Pyrite Concentrate: 37-39 % Fe and 43-45 % S

Final Transport and Trade of Concentrate

KCM-2000 Smelter

Hydrometallurgy (Chemical Processing) at KCM-2000 Smelter

Tungsten Concentrate 65.28 % WO3 (Tungsten trioxide, tungstic acid or ammonium paratungstate (APT)); Pyrite Concentrate to be processed in the lead (Pb) production scheme