| Title |
A Study on Wustite Microstructure Related to the Rate Retardation of Iron Ore Reduction |
| Abstract |
The morphology of reduced layer of iron ore was thoroughly investigated by means of optical microscopic technique. Between the grain size of Wu¨stite and the retardation of reduction process are closely related. The results withdrawn are as follows; 1. The rate retardation is caused by sintered Wu¨stite grains surrounded by sintered reduced iron layers. 2. All Wu¨stite grains are measured by means of Martin method and the total area of Wu¨stite is calculated. With this calculated Wu¨stite area, the reduction degree is deduced and the result is well conformed with chemically analysed data. 3. Experimental results and the data which calculated by simulation model of Soma are acceptably conformed. 4. The effective diffusion coefficient, C_sD_o (1.27×10^(-12), at 750℃) is calculated from the experimental results. |