Iron Recovery Technology of Red Mud—A review

RM (red mud), which comes from the Bayer process, has a huge annual output and is harmful to environment. Because of high iron content in RM, process recovery can reduce amount well create economic benefits, so it promising process. The paper focuses on review research method includes physical method, chemical emerging method. By comparing advantages disadvantages these processes, concluded that fluidized bed reduction be rapidly applied industry, but still needs more investigation overcome current technical difficulties near future.