The reducing agent in the blast furnace is

Reducing agents in blast furnace are: carbon monoxide.

The reaction principle of blast furnace ironmaking is: at high temperature, iron is reduced from iron ore with carbon monoxide as reducing agent; So the reducing agent in the process of blast furnace ironmaking is carbon monoxide.

Blast furnace ironmaking is one of the main methods of industrial ironmaking, and coke is an important part of blast furnace operation. So what is the role of coke in blast furnace ironmaking? First of all, coke is a reducing agent in blast furnace, which can reduce iron oxide in iron ore to iron. This is because coke has high reactivity and reduction performance, and the gas in blast furnace releases iron atoms bound in iron ore after passing through coke.

Secondly, coke is the fuel in the process of blast furnace ironmaking. A certain amount of heat is needed in the blast furnace to maintain the internal reaction, and at the same time, enough heat is needed to melt iron ore, which requires a lot of fuel to provide heat. Coke is one of the main fuels of blast furnace. Because of its small volume and high density, coke can generate a lot of heat in the blast furnace, thus providing energy for the blast furnace reaction.

Finally, coke can also be used as a catalyst for slag removal in blast furnace. In the process of blast furnace ironmaking, the slag generated by the reaction between iron ore and fuel needs to be discharged, otherwise it will affect the normal operation of blast furnace. Coke can promote the separation of slag and ore at high temperature and will be discharged from the blast furnace smoothly. Therefore, the role of coke is not only reflected in the reduction and heat production in the ironmaking process, but also helps the blast furnace to produce pure molten iron.

Principle of blast furnace ironmaking;

1, reduction principle:

The core principle of blast furnace ironmaking is reduction reaction. At high temperature, iron oxide (Fe2O3) in iron ore reacts with carbon monoxide (CO) to produce iron (Fe) and carbon dioxide (CO2). This reaction is a reduction reaction because carbon monoxide takes oxygen from iron oxide and reduces iron to elemental iron.

2, gas generation principle:

A lot of heat energy is needed in the process of blast furnace ironmaking, which comes from the reaction of coke (C) and oxygen (O2). At high temperature, coke reacts with oxygen to generate carbon dioxide (CO2), and at the same time, a lot of heat energy is released. This reaction also produces carbon monoxide (CO), which is the main reducing agent for blast furnace ironmaking.

3, slagging principle:

In the process of blast furnace ironmaking, impurities such as silica (SiO2) and calcium oxide (CaO) in iron ore will react with calcium oxide (CaO) in flux to produce slag and furnace ash. This reaction can separate impurities from iron ore to form slag and ash, thus realizing the purification of iron ore.