... ,CHENGGONG-CG,LIUGONG,XCMG,XGMA,LONKING-LONGGONG,SHANTUI,SEM wheel loader Work hoursGranite,Quartzite Porphyry,Rhyolite2000~3000hourAndesite ,Diorite,Porphyry2000~3200hourSynite,syeniteporphyry ... hoursSlag2500~5000hourScrap heap2800~4500hourIron ore3000~4000hourManganese ore1500~2500hourCopper ore2000~4500hourPb—zn ore3500~7500hour