The cohesive zone is a region of low permeability in a blast furnace. This study shows the impact of the chemical composition of pellets on the metallurgical processes occurring in this region during the iron ore reduction process. Sixteen pellets containing varying contents of MgO, CaO, and SiO2 were investigated. The results indicate that increasing the MgO content of pellets improves their high-temperature properties; e.g., reduction degree and softening temperature. Modern equipment was used to replicate the phenomena that occur in the cohesive zone to measure the softening temperature, pressure drop, and the reduction degree of pellets at elevated temperatures and different pellet basicities. These experimental results were used to develop mathematical correlations between parameters related to high-temperature properties and the ternary basicity of the pellets ((CaO + MgO)/SiO2). Defining such relationships will facilitate evaluating the effects of pellet chemical composition on blast furnace processes.

中文翻译：

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铁矿丸三元碱度对高炉熔炼软化性能的影响

粘结区是高炉中低渗透性的区域。该研究显示了球团的化学成分对铁矿石还原过程中该地区发生的冶金过程的影响。研究了 16 种不同含量的 MgO、CaO 和 SiO2 球团。结果表明，增加球团矿中的MgO含量可以提高球团矿的高温性能；例如，还原度和软化温度。现代设备被用来复制发生在粘结区的现象，以测量软化温度、压降以及在升高的温度和不同的颗粒碱度下颗粒的还原度。这些实验结果用于开发与高温特性相关的参数与球团的三元碱度 ((CaO + MgO)/SiO2) 之间的数学相关性。定义这种关系将有助于评估球团化学成分对高炉工艺的影响。