Heating-up Reduction and High Temperature Properties of High Alumina Sintered Ores

Microstructure Change and Primary Slag Melting of Sinter in the Cohesive Zone of a Blast Furnace

“…As a consequence, not only average slag compositions but also microstructures and morphologies might affect the melting behavior. As for the melting behavior of sinters, Tsutsumi et al 6) have suggested from the results of the load test that the olivine-like melt is primarily formed around 1 120°C and that the melt volume dramatically increases owing to the eutectic reactions of the olivine-2CaO · SiO 2 -FeO pseudoternary system around 1 220-1 230°C and of the 2CaO · SiO 2 -2CaO · Al 2 O 3 · SiO 2 -FeO pseudoternary system above 1 250°C. However, their suggestion has not yet been experimentally demonstrated by, for instance, observing the microstructure and phase changes during the melt production process.…”

Role of MgO in Sinter from Perspective of MgO Distribution between Liquid and Magnetite Phases in FeO_x–CaO–SiO₂–MgO System

“…[1][2][3][4] In particular, the increase of Al 2 O 3 content in iron ore is very serious because Al 2 O 3 lowers the reducibility of iron ore sinter and decreases the gas permeability in a blast furnace. 5,6) To overcome these problems, many attempts have been done, such as introducing micro pores into the sinter, 7) decreasing the volumes of gangue minerals in the sinter 7) and optimizing the compositions 4,[8][9][10] of gangue minerals in the sinter.…”

Crystalline Phase Quantitation of Sintered Ore with Powder X-ray Diffractometry with Rietveld Refinement

“…On the basis of these results, the sintering conditions for the three samples may be different. However, it is difficult to consider the difference in detail because the sintering conditions depend on many factors, including basicity, 7,8) reducing gas, 17,36,37) and impurities, 3,8) which affect the quality of the sintered ore.…”

“…80% of the raw materials used in iron manufacture. [2][3][4] Iron manufacture requires an enormous amount of energy because of the need for high temperature and pressure. In addition, the process exhausts large quantities of carbon dioxide because carbon monoxide is often used to reduce the ferric oxide in the iron ore.…”