Abstract: The Jiangxi iron mine are limonite mainly,The iron not only contains a lot of water and mud but also dressing concentrate is lack,adopted flotation,gravity selections,magnetism and firing carried out an experiment studying.The experiment indicates that on the ground of 37.16% of feed grade,the baking technology gained about 65% for iron concentrate,the recovery is over 80%.But thinks form economy,suggestion on adopting low-magnetism-high-magnetism-pro-flotation or classification-gravity-grained flotation ect technological process.