Needs expanded domestic beneficiation policies.
Last year, South Africa’s steel production output by producers using traditional coal-fired blast furnaces produced 2.59 million tonnes of steel, while the so-called mini-mills, where steel is made from scrap metal, yielded approximately 2.11 million in the same 12-month period.
This reflects the significant contribution being made by secondary steel producers to the economy and efforts to curb carbon emissions.
Green steel
While the respective outputs are relatively on par, the biggest differentiator is that mini-mills emit roughly four to five times less carbon than primary steel producers.
Amit Saini, one of the directors of Eastern Cape-based mini-mill Coega Steels, explained that the manufacture of so-called “green steel” has gained greater prominence as industries embraced sustainable practices to mitigate environmental impacts.
Amit Saini, one of the directors of Eastern Cape-based mini-mill Coega Steels, explained that the manufacture of so-called “green steel” has gained greater prominence as industries embraced sustainable practices to mitigate environmental impacts
“This shift is driven by increasing regulatory pressures, consumer demand for eco-friendly products and international commitments to reduce carbon emissions under pacts such as the legally-binding Paris Agreement on climate change,” says Saini.
“Steelmaking through scrap recycling is the leading and foremost method of green steel production. Recycling scrap metal significantly cuts carbon emissions compared to traditional methods.”
India a global leader
India has already established itself as a global leader in the green steel sector.
In terms of new guidelines released by the South Asian nation, steel with a carbon footprint of fewer than 1.6 tons of carbon dioxide equivalent (CO2e) per ton of finished steel (tfs) is defined as five-star green steel. That with emissions of 1.6 to 2.0 tons is rated four-star while 2.0 to 2.2 is three-star.
Saini says; “This landmark policy underscores the importance of setting clear guidelines to promote green steel. The US and many European countries have also implemented stringent green steel standards. These developments highlight the competitive advantage of green steel, which is sold at a premium in international markets due to its lower environmental impact.”
Aside from the scrap recycling aspect, the significantly lower carbon footprint is also attributable to the type of furnace being used – whether electric arc (EAFs) or induction, the latter of which is operational at Coega Steels. The Gqeberha mini mill’s furnaces are only able to process ferrous material containing iron and melt metals by way of electromagnetic induction.
Blast furnaces, on the other hand, produce steel from iron ore, coke and limestone.
Saini says it is increasingly clear that South Africa is perfectly placed to lead the “green steel revolution” in Africa, given its strategic position in regional and global markets.
Coega Steels’ Gqeberha mini mill’s furnaces are only able to process ferrous material containing iron and melt metals by way of electromagnetic induction
“We have the biggest base of mineral resources compared to other African countries. These carry an estimated value of $2.5tr (R44tr). While coal is widely used domestically (nearly 75% of its mined volume is used for, among others, electricity, chemical and liquid fuel production) and the balance exported, the story is different for iron ore.”
Domestic beneficiation policies
He further says that more than 90% of iron ore mined in South Africa is being exported due to limited domestic beneficiation (enhancing the economic value of raw materials) and constraints in the primary steel sector’s manufacturing capacity.
“South Africa should expand domestic beneficiation policies to include iron ore and coal, thereby enhancing their local value addition and reducing the reliance on exports. To maximise the country’s potential as a continental leader, it is imperative to revitalise the primary steel sector’s manufacturing capacity.”
“This should be done through targeted investments and policy incentives to develop mechanisms that will ensure cost-effective procurement of raw materials for domestic steel producers, therefore enhancing competitiveness.”
“By using iron ore to produce Direct Reduced Iron (DRI), they can alleviate potential scrap metal shortages in the domestic market in the future. It is a viable substitute for scrap and aligns well with the future of steel production in the country, particularly given the increasing adoption of EAFs over the next few years.”
Benefits of DRI-based steel production
“DRI-based steel production offers various benefits. It is less harmful to the environment and can ensure sustainable growth in steel production should South Africa reach a saturation point in scrap availability.”
“While the country currently lacks a merchant/trading DRI plant, affordable raw materials would become accessible to existing producers. Thereby encouraging new production capacity, should iron ore and coal beneficiation policies be promulgated.”
“Since South Africa had received more than $4 billion (R73 billion) in funding from bilateral and multilateral sources to help reduce carbon emissions, there was an obligation to implement actionable plans that aligned with global climate goals.”
“Promoting green steel production is a practical and impactful way to meet these commitments.”
