Milling experiment and research of Shijuli copper deposit in the North Qilian mountain

The major ore mineral in the Shijuli copper deposit is chalcopyrite,copperas stone and so on.The content of copper in the deposit is about 4%～20%.Because of the complicated incrustation of chalco-pyrites and copperas stone,the outcome of traditional floatation of copper mineral which only contain a stage of mineral milling less than 0.074 mm take about 70% (the raw material is the fourth yellow drug,calcareo usness and the No.2 oil) is unideal,And the content of copper in the powder out from the progress is only 15.03%,it waste much copper mineral.By the research of mineralogy of the copper mineral in this area and many experiments,the researchers discovered that use DY-1 to capture the copper,and int roduced two stages of mineral milling.In the first stage,they grinded the copper mineral cursorily to make 70% of the mineral powder to 0.074mm.In the second stage,they continue to grind the milled mineral powder of the first stage to make 95% of them to 0.043mm.After that they go on to pick out the copper aboratively.As a result,they can get essential copper which its contentr each to about 20.73% (copper),and the recycle rate of the copper is 86.97%.And the essential sulfur content from which is reach to about 45.19% (sulfur),the recycle rate of the sulfur is 74.11%.The result of the experiment can apply to the mill-run progress in other diggings.