Study On Microwave Carbon Thermal Reduction Of V-Ti-Magnetite Concentrate

Resources of V-Ti-Magnetite in PanZhiHua are the unique valuable natural resources in China, From PanZhihua iron and steel company current process(BF-BOF) extracted ratio of V and Ti is lower comparing with high utilization ratio of Fe.So, valuable natural resources not only obtain the value, but also pollute the environment serously.Finding new process and improving comprehensive utilization of Fe,V and Ti in V-Ti-Magnetite are very important purposes, in order to exploiting western abundant resources in Paizhihua and display economic and social efficiency. This paper will study microwave carbon thermal reduce V-Ti-Magnetite, and microwave heating replace exothermal of carbon combustion,on the other hand carbon is only as reduction. In the end, this method may reduce emission of CO2,at the same time microwave may accelerate the speed of chemical reaction so that promote reduction of solid phase, as a result, TiC and TiN will be decreased and Fe,V,Ti will be separated.The paper focuses on the heating behaviors of vanadium-titanium magnetite . The effects of concentrate's size, quality, CaO and other factors on heating behaviors and reduction process were researched. Lastly under1000W of microwave power and 20min of heating time, concluding that when the dual-basicity(CaO/SiO2) of sample is 1.8 ,mass of sample is 75g and size of it is less than or equal to 80 mesh,warming-up nature of V-Ti-Magnetite concentrates reach a good result ,which is a important research for further reducing process.Also,the software"Fluent"simulate the process of raising temperature in heating process,the result of simulating is concordance with result of experiment. At last, this paper emphases the characteristics of carbothermic reduction of V-Ti-magnetite in the microwave field. The effects of concentrate's size, quality on heating behaviors and reduction process were researched. Results show that microwave heating may be a new heating resource replace of carbonic combustion reaction in reducing reaction. When the allocation of carbon is 16.7~30%, carbothermic reduction of V-Ti-magnetite in the microwave field can proceed; with the increasing of carbon mixed, the metallization rate increases; and Fe, V can be reduced from their oxides in the microwave field, Titanic low oxide can be reduced from TiO2.