四川某深部难选矿工艺矿物学研究OA

In order to develop and utilize useful metals such as copper,iron,and zinc in deep underground minerals,the MLA system was used to study the process mineralogy of difficult to beneficiation minerals in a copper mine in Sichuan province.The structure,composition,element distribution,embedding characteristics,and particle size dis-tribution of the minerals were analyzed.The results showed that the metal element iron has the highest mass fraction in the minerals,reaching 27.01％;The mass fractions of copper and zinc elements in deep minerals are higher than those in shallow minerals,especially zinc element.Deep minerals are 1.64％higher than shallow minerals,while copper element is only 0.6％higher;The main metallic mineral in the raw ore is pyrrhotite,with a small amount of chalcopyrite and sphalerite;The non-metallic minerals are mainly quartz.The mass fraction of chalcopyrite in deep minerals is 2.09％higher than that in shallow minerals,and the mass fraction of sphalerite is 2.71％higher;Copper element mainly exists in chalcopyrite,up to 99.87％;iron element mainly exists in pyrrhotite,chalcopyrite,chlorite and hematite,and the mass fraction of iron element in pyrrhotite is the highest,up to 81.45％;zinc element mainly exists in marmatite,up to 99.53％.The flotation effect of copper and zinc is best when the ore size fraction of-0.074 mm is 60％.The embedding characteristics of pyrrhotite and chalcopyrite are mainly in the form of monomer dissocia-tion,while sphalerite mainly exhibits binary coexistence and ternary inclusion relationships with other minerals.The mineral particle size is mainly distributed in the range of-1.2+0.424 mm,which can be completely dissociated by grinding.This research result can provide theoretical guidance for the efficient development of the deep copper deposit.