Study on Beneficiation Process for Roasting Products for Yunnan Siderite Ore

On the basis of properties of roasting Products for Yunnan siderite ore and the related research tests,fine grinding-low intensity magnetic separation is the effective process of treating the roasting products.It is demonstrated by test that: 1) roasting effect of this siderite is good;2) grinding is the important factor of affecting beneficiation indexes;3) both low intensity magnetic and gravity separation can effectively recover iron minerals in fine-grinding roasting products;4) under the same grinding conditions,the recovery of low intensity magnetic separation is higher than that of gravity separation,but the enrichment rate is relative lower;5) iron concentrate with 74.10% grade and 93.06% recovery can be obtained by using the processes of grinding(grinding size 72.51%-0.074mm)-low intensity magnetic separation(magnetic intensity 232kA/m),one roughing,and one cleaning to treat roasting products.