Abstract: The average gold grade of a refractory gold ore is 4.84g/t and it contains 0.51% of arsenic and1.75% of carbon(1.07% of organic carbon).The particles of gold are relatively fine,mainly distributing in the monite ore and clay minerals and secondarily occurring in the crystal lattice of pyrite and arsenopyrit in the ultramicroscopic interstitial state.Therefore,it belongs to the refractory kind of ore.This experiment first adopts flotation concentration to obtain gold concentrate,then pretreats it under the c...