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 is the difference between coal and coke?
What is the difference between coal and coke fuel? Coal is a shiny, black fossil fuel that contains impurities, emits smoke when burned, and produces less heat than coke. Coke is a dull, black byproduct of coal that burns hotter and cleaner.
What is coke oven in steel plant?
When coking coal is heated in absence of air, a series of physical and chemical changes take place with the evolution of gases and vapours, and the solid residue left behind is called coke. Conventional cokemaking is done in a coke oven battery of ovens sandwiched between heating walls.
Can steel be made without Coke?
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.
Which is better coke or coal?
Coke is a better fuel than coal because; -Coke produces more heat on burning than coal. -Coke has a higher calorific value than coal. When equal masses of coke and coal are burnt, coke produces more heat.
What is soft coke?
Soft coke :- Soft coke is obtained by high temperature carbanisation.It is used as a domestic fuel for making water gas and acetylene. Also it is obtained as a by-product in the manufacture of coal gas.
Where is Coke used?
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.
How is steel made?
Steel is primarily produced using one of two methods: Blast Furnace or Electric Arc Furnace. The blast furnace is the first step in producing steel from iron oxides. The first blast furnaces appeared in the 14th century and produced one ton per day.
Why Coke is not used as a fuel?
The term means a product similar to coal and mined the same way. Coal is cheaper and that is why it is used more often. … Coke is cleaner and other methods should be looked into before coal and oil run out.
Do you need oil to make steel?
Crude oil is used in the process to make steel. Over the past couple of years, the steel industry in the United States has come under pricing pressure from other nations. There are many nations around the world where steel can be made for much less than in the United States.
How carbon is added to steel?
Smelting, using carbon to reduce iron oxides, results in an alloy (pig iron) that retains too much carbon to be called steel. The excess carbon and other impurities are removed in a subsequent step. Other materials are often added to the iron/carbon mixture to produce steel with desired properties.
Is steel made from coal?
Global steel production is dependent on coal. 70% of the steel produced uses coal. Metallurgical coal – or coking coal – is a vital ingredient in the steel making process. … The primary source of this carbon is coking coal.
Why is Coke preferred over coal?
Coke is a better fuel because coke produces more heat on burning as compared to coal. Coke has higher calorific value than coal. When equal masses of coke and coal are bunt, coke produces more heat. Also when coke is burnt, smoke is not obtained whereas coal produces smoke on coal.
Is Coke is a clean fuel?
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) to the iron product. Although coke is more expensive than coal, it can be used in households as a clean fuel, relatively free of smoke and impurities.
What is pet coke used for?
Petcoke can take two different forms: green petcoke which is used as a fuel and calcined petcoke which is used as a feedstock by manufacturer for a wide range of products such as aluminum, paints, coatings and colorings which are used by millions of people.