Taking sodium silicate and sulphuric acid as a composite depressor,float As and depress Sb.The hard problem that the As and Sb separate can be satisfactorily resolved,and the Sb ore concentrate with As is in accordance with state quality standards.

In the light of the ores characteristics of the Dahenglu Cu-Co ores,Baishan area,Jilin Province.The flow-sheet,ore dressing chemical reagent partitioning and ore dressing indexes of floating and recovering Cu-Co ores are tested and studied.On condition that Cu grade of 0.093%,Co grade of 0.062%,and fineness of grinding of(-74 μm),Cu was roughened for one time,cleaned for two times,scavenged for two times;Co was roughened for one time,scavenged for two times,they can obtain mixed Cu concentrate of 13.06% in grade,recovery percent of 70.53%,Co of 0.69% in grade and recovery of 73.04% respectively.