Technological Mineralogy and Manganese Occurrence State of a Manganese-Silver Deposit in Guangxi

The technological mineralogy of a manganese-silver deposit in Guangxi is studied.Identifying its mineral(composition,) the metallic minerals are revealed consisting of psilomelane,pyrolusite,pyrite and hematite with a few of arsenopyrite,chalcopyrite and sphalerite.The textures of the manganese-silver ore include aphanitic,colloform,micro-squama and arenaceous textures,and its structures are mainly the vein,colloform and disserminated structures.The silver grade of manganese-silver concentration is 3?923?g·t~(-1).The occurrence state of manganese in the deposit is the self-contained manganese mineral including psilomelane and pyrolusite.In the concentration the grain size distribution of psilomelane is 17% in the range 0.152～0.088?mm,38% in 0.088～0.074?mm and 40% 0.074?mm,while that of pyrolusite is 18% in 0.152～0.088mm,35% in 0.088～0.074?mm and 37% 0.074?mm.