Helix Carbon Says Saving the Steel Industry Starts Inside the Blast Furnace

The global iron and steel industries have long carried an environmental reputation that is as heavy as the materials they produce. Responsible for a staggering share of worldwide carbon emissions, the sector has become a primary target for climate-focused innovators. Over the past several years, a wave of clean-tech startups has emerged to challenge traditional metal production methods, attempting to overhaul how iron and steel are made from the ground up.

However, according to Helix Carbon, an ambitious startup looking to make its mark on heavy industry, most of these companies have been approaching the problem entirely backward.

“Any attempt to decarbonize the steel industry without dealing with the blast furnace is not going to work,” David Brown, Helix Carbon’s co-founder and chief executive officer, told TechCrunch.

The blast furnace is the colossal industrial vessel responsible for transforming raw iron ore into the molten iron required for steel production. Rather than trying to completely replace these massive, deeply entrenched structures—a monumental task given the financial and physical realities of heavy manufacturing—Helix Carbon wants to clean them up from the inside. The startup’s innovative approach promises to drastically slash the carbon footprint of the steel sector while simultaneously boosting profit margins for iron producers, presenting a rare and compelling win-win scenario for a notoriously carbon-intensive industrial process.

For centuries, blast furnaces have relied on a predictable, chemical recipe to forge iron. The process uses coke, a heavily processed, carbon-rich form of coal, to help convert raw iron ore—which is essentially iron chemically bound with oxygen—into metallic iron. Within the roaring depths of the furnace, the burning coke performs a dual role. It supplies the intense thermal energy required to drive the chemical reactions, but it does not take part in those reactions directly. Instead, carbon monoxide produced from the combustion of the coke does the heavy lifting of reducing the iron, a chemical process that involves aggressively stripping away the oxygen atoms bound to the ore.

While effective at scale, this centuries-old method releases astronomical amounts of carbon dioxide as an inevitable byproduct. Traditionally, this waste gas is treated as industrial exhaust and dumped straight into the atmosphere, cementing the steel sector’s status as a leading contributor to global greenhouse gas emissions.

Helix Carbon has devised a clever technological workaround to interrupt this cycle. The company has engineered a system designed to capture that waste carbon dioxide, convert it back into carbon monoxide, and seamlessly recycle it directly back into the blast furnace.

The core of Helix Carbon’s proprietary process relies on an advanced electrolyzer, a specialized device that uses electricity and a chemical catalyst to split oxygen atoms away from carbon dioxide molecules. While electrolyzers themselves are far from a brand-new invention, Brown noted that his startup’s specific design possesses a crucial differentiator: it can handle the entire, raw exhaust stream straight out of a blast furnace.

Most commercial electrolyzers currently on the market are notoriously delicate pieces of equipment. They typically require highly purified, highly concentrated streams of carbon dioxide to function properly. Because of this limitation, industrial exhaust usually has to undergo extensive, costly preprocessing before standard electrolyzers can even begin to touch it. Helix Carbon’s hardware bypasses this bottleneck, opening the door for direct integration with existing manufacturing plants.

By injecting freshly generated carbon monoxide back into a blast furnace, iron producers can significantly reduce the amount of raw coke they need to burn to achieve the same chemical reduction. Exactly how much coke can be conserved remains a subject of ongoing discussion within the scientific and industrial communities, according to Brown. Some academic papers suggest that optimized carbon monoxide injection could eliminate as much as 90 percent of the coke traditionally required. Other independent studies offer a more conservative estimate, pegging the potential reduction closer to 30 percent or 40 percent.

To establish a realistic foothold in the commercial market, Helix Carbon is proposing that iron producers start by substituting just 33 percent of their traditional coke consumption with the startup’s recycled carbon monoxide. The company calculates that utilizing its technology to achieve this initial reduction milestone would save producers roughly $14 for every single ton of iron produced.

“That may not seem like a lot, but margins in the iron industry are famously thin,” Brown noted, emphasizing how critical even minor financial efficiencies are to heavy manufacturers operating in a cutthroat global market.

Operating within the iron and steel sectors means playing in a massive economic arena. According to market research firm Grand View Research, the combined global market for iron and steel is valued at an astonishing $2 trillion, making the sector an immensely appealing target for young, venture-backed startups looking to scale their impact.

At the same time, heavy industry is notoriously slow-moving. The inertia of the sector is driven largely by the staggering longevity of its capital equipment. Billions of dollars are tied up in physical infrastructure that is expected to operate for decades, if not a century or more.

“There are blast furnaces that have lived for over 100 years,” Brown pointed out, illustrating the immense challenge of convincing legacy operators to adopt unproven hardware.

To navigate this slow-moving industrial landscape and secure early revenue streams, Helix Carbon has mapped out a strategic pivot. Before attempting to retrofit every century-old blast furnace across the globe, the startup plans to court the specialty chemicals industry first, targeting a market that can utilize its technology on a shorter timeline.

“We don’t need to capture the CO2 first,” Brown explained. “We just utilize it, and that opens up the door of making chemicals on-site right out of waste streams.”

This commercial strategy took center stage as Helix Carbon made its pitch live onstage during the Startup Battlefield competition at TechCrunch Disrupt in San Francisco. Presenting its vision to a crowd of technology leaders, investors, and climate advocates, the startup highlighted how industrial waste can be transformed from an environmental liability into a valuable manufacturing input.

As the broader climate tech community continues to search for viable pathways to decarbonize the world’s most stubborn industrial sectors, startups like Helix Carbon are betting that the fastest way forward isn’t tearing down the foundations of the past, but rather finding ingenious ways to upgrade them from within.