You asked: Is coal used in a blast furnace?

Why coal is not used in blast furnace?

Coal cannot be directly charged via the furnace top, it must first be transformed to coke. Raw materials are charged to the furnace in alternating layers of coke and ore. This alternating layer structure inside the furnace has a profound impact on the operation of the furnace and on the required quality of coke.

Is coke obtained from coal?

Coke is produced by heating coal at high temperatures, for long periods of time. This heating is called “thermal distillation” or “pyrolysis.” In order to produce coke that will be used in blast furnaces, coal is usually thermally distilled for 15 to 18 hours, but the process can take up to 36 hours.

Why is coke a cleaner fuel than coal?

Coke is rich in carbon which is up to 98% and is used as fuel. coke can be substituted in the place of coal as fuel. It has higher calorific value and produces more heat than coal. Coke the form of a clean fuel as it does not produce smoke while burning and it does not pollute the air like a coal.

What is the hottest furnace on earth?

The current official highest registered air temperature on Earth is 56.7 °C (134.1 °F), recorded on 10 July 1913 at Furnace Creek Ranch, in Death Valley in the United States.

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Can steel be manufactured without coal?

It is a myth that steel production requires coking coal. A third of global steel today is made without coking coal, either through scrap recycling or gas-based steel production; and counting.

Is coal needed for steel?

Coal and coke

Coking coal is a key raw material in steel production. As iron occurs only as iron oxides in the earth’s crust, the ores must be converted, or ‘reduced’, using carbon. The primary source of this carbon is coking coal.