Research on the Preparation of Welding Rod Coating Using Ilmenite Carbothermic Reduction

The preparation process of welding rod coating by ilmenite carbothermal reduction was investigated.When the conditions are oxidized temperature 850~900℃,content of composite additive 3%~5%,reduce temperature 1 100~1 150℃ and roast time 240~270 min,it can be obtained for the reduced ilmenite of which TiO 2 more than 52%,FeO less than 5%,and the harmful elements of C,S,P all less than 0.03%.Phase,morphology and compositions of ilmenite were analyzed by XRD、SEM、EDS and TGA,and the results indicated that oxidized roast and present of composite additive can change the crystal construction of ilmenite,making the mineral porous and increasing the reduction reaction rate and reduce reduction temperature.The SEM and EDS results showed that a good appearance of reduced ilmenite is obtained,which almost contains no harmful elements such as C,S and P.