Why do we use coke 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.

Can you make iron without coke?

Specifically, the coal was converted into “coke” by heating it in oxygen-starved conditions to drive off embodied water and volatile organic chemicals. While an increasing amount of steel is being recycled, there is currently no technology to make steel at scale without using coal.

What were the advantages 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.

Can you make iron from coal?

Already these plants have about half the carbon emissions of coal-based steel plants. It would not be difficult to replace the hydrogen from natural gas used in these plants with hydrogen produced with renewable energy.

What is coke as opposed to coal?

By distilling bituminous coal in retorts to obtain gas for illumination, or by burning it in kilns or pits, the residue left behind is called coke, which is simply coal charcoal, and is nearly pure carbon.

Is coke a form of coal?

The unqualified term “coke” usually refers to the product derived from low-ash and low-sulphur bituminous coal by a process called coking. A similar product called petroleum coke, or pet coke, is obtained from crude oil in oil refineries.

Why is coke used to make steel?

Coke is used as a fuel and a reducing agent in melting iron ore. When coke is consumed it generates intense heat but little smoke, making it ideal for smelting iron and steel. Prior to the 1880’s, steel was produced using charcoal. By 1920, nearly 90\% of US steel was produced using coke.

What is the difference between coke and coal?

Coal is a lustrous, black fossil fuel that includes impurities, generates smoke, and generates less heat than coke when burned. Coke is a dingy, black coal waste that burns hotter and cleaner. Coke is a fuel made from mineral coal that has been calcined or dry distilled.

Why is coke preferred to coal in metallurgical process?

Coke is preferred over coal for metallurgy because it has a greater boiling point than coal that is over 3800° C.

How is coke formed what are its uses?

Coke is a grey, hard, and porous fuel with a high carbon content and few impurities, made by heating coal or oil in the absence of air—a destructive distillation process. It is an important industrial product, used mainly in iron ore smelting, but also as a fuel in stoves and forges when air pollution is a concern.

Why is coke needed to make steel?

What is coke in iron?

From Simple English Wikipedia, the free encyclopedia. Coke is a fuel used mainly in blast furnaces to reduce iron oxide to produce iron. It contains carbon, and is similar to coal. It is made from coal by cooking out things that are not carbon.

How is coal converted to iron and Coke?

Firstly coal is converted to lump coke in a coking oven. A particular rank of coal, known as “coking coal”, is required to make the preferred quality of coke. Then raw iron is made by reducing (removing the oxygen from) iron ore (iron oxide) by reacting it at high temperature with coke in a blast furnace.

How is coke used to make steel?

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. Prior to the 1880’s, steel was produced using charcoal. By 1920, nearly 90\% of US steel was produced using coke.

Can steel be made without coal and Coke?

Steel demand around the world has never been higher. In China alone in 2015 steel production rose to over 803 million metric tons. But steel production would not be possible without the use of coal and coke. What is coke? Coke is used as a fuel and a reducing agent in melting iron ore.

What is the purpose of using a coke in a furnace?

Coke is used as a fuel and as a reducing agent in smelting iron ore in a blast furnace. The carbon monoxide produced by its combustion reduces iron oxide (hematite) in the production of the iron product. https://www.dhanvanthri.com/prod…