Abstract
Reducibility and suitable mechanical properties are important factors affecting iron ore sinter quality. Unfavourable mechanical properties and reducibility decrease blast furnace efficiency. In this work, the influence of talc additive on the reducibility and strength of sinters was studied and compared to that of bentonite. The experiments were performed using a mixture of raw materials with various amounts of talc and bentonite sintered at 1150°C. The mechanical strength of sinters was determined by both Drop and Tumbler methods. The sinter reducibility test was carried out at temperatures of 1050 and 1150°C and times of 60 and 90 min. The results showed that the maximum value of sinter strength was obtained by addition of 6 and 4 wt-% of talc and bentonite, respectively. Above these values strength decreases once more. Reducibility was decreased both by talc and bentonite, but to a less extent by talc.
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