The high carbon ferromanganese blast furnace smelting operation is similar to that of pig iron blast furnace, but the high carbon ferromanganese blast furnace has the following different characteristics:
①The content of MnO in manganese ore is lower than that of FeO in iron ore, and MnO is harder to be reduced than FeO. The amount of slag in the smelting process is large, and the recovery rate of manganese is lower....
② Because the affinity between manganese and oxygen is stronger than iron, higher temperature and larger energy are needed to reduce MnO, so the smelting coke ratio of high carbon ferromanganese in blast furnace is much higher than that of pig iron smelting, and the coke load is light.
③ Due to the high coke ratio and light coke load, the difference in particle size between coke and ore is large. The edge gas flow is easy to develop, causing gas flow disorder and easy to produce deviation pipe
Piping.
④ High-carbon ferromanganese blast furnace gas is large in volume and high in calorific value, resulting in high temperature at the top of the furnace, high dust content in the gas, and difficulty in purification.
⑤ Furnace lining erosion is fast and easy to build up at the bottom of the furnace, which makes the lifetime of the furnace lining lower than that of pig iron blast furnace.
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