Shandong Iron Element Metal Materials Co., Ltd.
The role of iron ore and coke
Release time:
2025-03-14
The iron smelting process is usually carried out in a blast furnace. In the blast furnace, iron ore, coke and limestone are mixed in a certain proportion and heated by injecting hot air. The combustion of coke produces heat while producing carbon monoxide. Carbon monoxide reacts with oxides in iron ore to produce iron and carbon dioxide. Limestone is used to convert silica in ore into slag to separate from iron.
Iron ore and coke play a crucial role in the industrial ironmaking process.
The role of iron ore
Iron ore is the main raw material for iron smelting and provides iron elements. During blast furnace smelting, iron ore undergoes high-temperature reduction reaction to produce iron. The main components of iron ore are iron compounds, such as magnetite (main component Fe_3O_4) or hematite (main component Fe_2O_3). These ores react with reducing agents in blast furnaces to produce iron and slag.
The role of coke
Coke plays two main roles in the iron smelting process:
Providing heat: Coke reacts with oxygen to produce carbon dioxide, and releases a lot of heat, which is used to maintain the temperature in the blast furnace and ensure that the iron smelting process is carried out under high temperature conditions.
Creating reducing agent: The carbon dioxide generated by the reaction of coke and oxygen reacts with excess coke to produce carbon monoxide (CO), which reduces iron from iron ore as a reducing agent.
Iron smelting process
The iron smelting process is usually carried out in a blast furnace. In the blast furnace, iron ore, coke and limestone are mixed in a certain proportion and heated by injecting hot air. The combustion of coke produces heat while producing carbon monoxide. Carbon monoxide reacts with oxides in iron ore to produce iron and carbon dioxide. Limestone is used to convert silica in ore into slag to separate from iron.
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