The steel industry is one of our worst polluters, but new practices could save money and cut emissions a whopping 90 percent.
Steelmaking is one of modern society’s literal building blocks, but it comes at steep environmental costs—today, the iron and steel industriesof all global greenhouse gas emissions.
The issues stem from traditional blast furnace operations, which requires distilling coal in coke ovens which eventually produce carbon monoxide. Once the coke interacts with iron ore in the furnace, its resultant “top gas” composed mainly of CO, CO2, and N2 is then burned to raise its air blast temperature as high as 1350C, with leftover pollutants released into the outside air.
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