Carbon emissions in the steel sector must
fall by 75% from today’s levels to limit global warming to within 2 degree
celsius, says Wood Mackenzie in its latest base case report.
“This is an extremely challenging target
to meet. The steel industry would need to find the right balance between
managing rising demand and pressure to decarbonise,” says Wood Mackenzie senior
analyst Mihir Vora said. “The pathway to a 2°C world is filled with obstacles
compared to our base case view.”
Steel demand is expected to rise 23% to
2,300 Mt between 2020 and 2050. Developing economies such as India, Southeast
Asia and South America are expected to drive demand growth, WoodMac says, while
China and Europe would pare down their consumption.
“Currently, steel is responsible for 7%
of global CO2 emissions,” Vora says. “The industry needs to prioritise
decarbonisation if the world is going to achieve a 2°C warming pathway aligned
to the goals of the Paris climate agreement.
“Advanced economies will need to do more
to curb emissions via innovative new steelmaking pathways such as hydrogen use,
while developing nations will be slow adopters and small contributors to
emissions reduction.”
Wood Mackenzie outlined five main
outcomes that would need to be achieved for the steel sector to achieve a 2°C
warming pathway. They include doubling scrap use in steel making; tripling
direct reduced iron (DRI) production and use; reducing global average electric
arc furnace (EAF) emissions intensity by 70%;) reducing blast furnace – basic
oxygen furnace (BF-BOF) emissions intensity by 30%, close to its theoretical
minimum; and capturing and storing 45% of the residual carbon emissions (around
500 Mt per annum).
Aligning to a challenging 2°C warming
pathway in the steel industry would mean disruption to the iron ore and
metallurgical coal markets. It would, WoodMac notes, be a boon for hydrogen
demand in steelmaking as well as carbon capture and storage.
“Steel’s potential extreme
decarbonisation in a 2°C scenario would mean tripling DRI production. This
presents a huge opportunity for suppliers of premium iron ore,” says Rohan
Kendall, head of iron ore research. “Although the rise in scrap consumption
would lead to total iron ore demand falling by 24% below our base case, the
market for pellet products would expand by 35%.”
The decarbonisation of the steel sector
in this scenario would boost DRI trade. Australia and Brazil could be well
positioned to produce H-DRI for export. DRI using green hydrogen as the
reductant can produce steel with almost zero CO2 emissions. China and Europe
would be key DRI importers.
To achieve scrap use growth, scrap
recycling rates would have to increase from 80%-85% to 95%, WoodMac says. India
and China scrap supply chains would require substantial development which would
contribute to displacement of iron ore demand, notably taking effect post 2030.
“Under a 2°C scenario, hot metal
consumption is expected to decrease 667 Mtpa below our base case by 2050 to 795
Mt. This in turn leads to an almost halving of the total annual metallurgical
coal demand to 622 Mt from our base case by 2050,” says WoodMac’s metallurgical
coal principal analyst Anthony Knutson.
Seaborne metallurgical coal trade would
fall in this scenario, although domestic coal in China would bear the brunt of
declines.
“In a 2°C world, seaborne imports would
be all but eliminated during the 2040s in China, leaving only a nominal volume
of the highest-quality coking coals imported to coastal mills,” Knutson says.
“India, on the other hand, would double its import requirement to 123 Mtpa, as
its steel demand outpaces its ability to decarbonise.
“PCI demand comes under great pressure in
a 2°C scenario falling by 50% or 37 Mt as hydrogen injection rates increase.”
A successful rollout of carbon capture
and storage – which under this scenario could reach 500 Mt of emissions
captured in 2050 – would provide an opportunity for continued use of
metallurgical coal in steelmaking as emissions captured via this pathway is
from BF/BOF steelmaking.
MINING.COM