Abstract: Based on the study of mineral constitute and technological mineralogy,the enrichment of a mid-low barium ore by flotation was realized by adopting the key technology of pre-flotation to remove carbon and slime.The flotated concentrate was leached by pickling waste liquor and the leaching solution after being removed impurity was used to prepare precipitated barium sulfate,whose quality is up to the second-class national standards.The combined technology of processing and metallurgy with less energy consumpt...