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How is coal used to make steel?
Steel is an essential material for modern life and global steel production is dependent on coal – 70% of steel produced uses coal. Metallurgical coal 鈥?or coking coal 鈥?is a vital ingredient in the steel making process. Coking coal is converted to coke by driving off impurities to leave almost pure carbon. The coking coal is crushed and washed.
Can steel be made without coal?
So, steel can be made without metallurgical coal. And green steel made from renewable-generated hydrogen may one day be affordable. Until then, lower-cost innovations such as HydroMOR can help bridge the gap between today鈥檚 use of metallurgical coal and tomorrows hydrogen future.
How much coal does it take to make steel NZ?
World steel production in 2011 was 1518 Mt and used 761 Mt of coal 鈥?12% of all hard coal mined. The Glenbrook plant (now owned by Bluescope) makes 600-650,000 tpy steel and uses 750,000 tpy Huntly coal plus 1,000 GWh electricity and some Natural Gas, supplying 90% of NZ鈥檚 needs. It also recycles steel. Can we make steel with less coal?
What is metallurgical coal?
Metallurgical coal, also called metcoal or coking coal, is a type of coal that is used in the production of steel. It is of a higher purity than thermal coal which is used in energy generation. To make steel, metcoal is heated at around 1100 degrees C to remove water and other chemicals.
