How does the electric arc furnace melt the iron and steel?

How does the electric arc furnace melt the iron and steel?

The electric arc furnace is used to reduce iron from iron ore. Heat is generated from an electric arc between electrodes. Oxygen is blown into the furnace, and lime and other materials are added to combine with the impurities and form slag. Molten iron is extracted and poured out via a tapping spout.

What does the electric arc furnace use for making steel?

The first electric arc furnaces (EAFs) appeared in the late 19th Century. The use of EAFs has expanded and now accounts for nearly 2/3 of steel production in the United States. The EAF is different from the blast furnace as it produces steel by using an electrical current to melt scrap steel and/or direct reduced iron.

Can steel be made without coal?

Now, nearly all new steel globally is produced using iron oxide and coking coal. While an increasing amount of steel is being recycled, there is currently no technology to make steel at scale without using coal.

Why is coke used instead of coal?

The single most important factor is strength ( mechanical compressive ); coal is heated to make coke, the resulting coke is stronger than the original coal. Also, coke helps to make the charge of iron oxides and limestone more porous to permit gas flow up and droplets of liquid iron and slag down.

Why do we use coke for making steel and not coal?

Coke is used as a fuel and a reducing agent in melting iron ore. It is produced by baking coal until it becomes carbon by burning off impurities without burning up the coal itself. When coke is consumed it generates intense heat but little smoke, making it ideal for smelting iron and steel.

What were the advantage of using coke as a substitute for charcoal in smelting?

Coke has the advantage of having fewer impurities as compared to coal as a fuel. EXPLANATION: Coke and coal are both used as fuels where coal is a natural fuel whereas coke is a derived fuel. Coke has a high carbon content and low ash and sulphur content which makes it very highly priced in the market.

What are the advantage of using natural gas as a fuel?

Natural gas is environmentally friendly because it burns cleaner than other fossil fuels. It’s safer and easier to store when compared to other fossil fuels. Natural gas is extremely reliable, unlike electric power that can be knocked out during a storm. Natural gas is less expensive than other fossil fuels.

Why should be a metallurgical coke porous in nature?

Why should be a metallurgical coke porous in nature? Explanation: When the metallurgical coke is porous then it becomes easy for the carbon present in it to make contact with oxygen so that the combustion process can be done efficiently of the fuel in the furnace. It increases the rate of combustion.

Why is Coke added to blast furnace?

Carbon is more reactive than iron, so it can displace iron from iron(III) oxide. Step 2 – More coke is added to the furnace and reduces the carbon dioxide into carbon monoxide, a good reducing agent.

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