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"Effects of Blast Furnace Representative Temperatures and Gas Compositi" by Raymond James Longbottom, Joe Perkins et al.

The effects of coke mineralogy on coke reactivity under conditions representative of the blast furnace were studied. Coke samples were reacted under coke reactivity index (CRI) like conditions (1 100°C, 100% CO2) and at higher temperatures and atmospheres designed to replicate conditions lower in the blast furnace. The effects of the minerals on reactivity changed as the temperature increased and the atmosphere was modified. At the lower temperatures investigated (1 100-1 350°C) with CO2 present in the gas, gasification of the coke by CO2 dominated. The effects of minerals in the coke on gasification by CO2 under these conditions were similar to their reported effects on reactivity in the CRI test. At the highest temperature investigated, (1 600°C), with no CO2, the mineral-carbon reactions dominated. The main reaction was the reduction of the silica in the coke. These results show that when coke-gasification is dominant, CRI data can be related to conditions beyond the temperature ....

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