Blatant Blast‑Furnace Bloat

In June 2025, Chinese steel firms under the China Iron and Steel Association reported a staggering 17.3% year‑on‑year increase in total emissions from steel production. Ironically energy consumption across these enterprises fell by 3.6% over the same period. This divergence reflects the continued dominance of coal‑fired blast furnaces, whose heavy carbon intensity outweighs modest gains in efficiency. Despite retrofits & incremental improvements, these furnaces remain a sine qua non of capacity, locking emissions into a structurally elevated trajectory even as power usage declines. Vice chairman Jiang Wei emphasised the challenge, stating that ultra‑low emissions upgrades remain crucial though insufficient amid rising blast furnace liquidity.

Pollution Paradox & Particulate Progress

While overall carbon emissions soared, pollutant discharge fell significantly. Sulfur dioxide emissions dropped by 6.8%, particulate matter by 7% & nitrogen oxides by 9.2% year‑on‑year in June. Wastewater indicators improved too, chemical oxygen demand fell 12.8%, ammonia declined 12.3%. These reductions demonstrate effective abatement technologies in waste gas & water treatment systems. However despite cleaner effluents, the CO₂ surge underscores that surface‑level improvements cannot substitute for structural transformation in core emissions sources.

Energy Efficiency & Electricity Elevation

Total energy use per ton of steel increased by 1.8%, while comparable energy consumption rose by 2%; electricity consumption per ton climbed 4.3% year‑on‑year in June. Firms bolstered internal power generation, own electricity output rose 10.2%, increasing its share of total supply by 3.35 percentage points, and clean energy rose 51.8%, driven by wind jumping 655% & solar up 51.7% year‑on‑year . Yet rising per‑unit consumption indicates that while power sources shift, process inefficiencies persist, particularly in heat‑intensive metallurgy reliant on fossil fuels.

Inventory Inertia & Output Oscillation

Although daily crude steel output edged down by 0.9% in late June, averaging around 2.13 million metric tons per day, it reflected softer demand rather than proactive policy restraint. Finished product inventories increased mid‑June to 16.21 million metric tons, before falling to 15.45 million metric tons by late June, reflecting sales lag amid oversupply. These production dynamics highlight that capacity remains ample despite muted demand, enabling continued emission accumulation even as activity slows.

Ultra‑Low Emission Urgency

CISA has set a target for 80% of China’s steel production capacity to complete ultra‑low emission retrofits by the end of 2025-. As of April, 591 million metric tons of capacity had finished upgrades, while another 169 million had partial compliance. Yet those gains offset only surface‑level pollutants; CO₂ emissions continued to rise 4.1% in 2024 across the industry amidst declining production. The vice chairman noted that although abatement targets meet regulatory standards, reliance on blast furnace-based output threatens to thwart carbon goals unless production structure itself changes.

Hydrothermal Haze & Water Wastage

Water withdrawal among member firms rose by 2.2%, water reuse fell 0.9 percentage points to 98.34%; water consumption per ton of steel increased 3.3% year‑on‑year to 2.5 m³. Although reuse remains high, rising per‑unit water demand signals inefficiencies in industrial cooling & treatment systems. Wastewater chemical oxygen demand and ammonia loads also declined ~9‑12%, showing improved effluent quality, yet overall water intensity remains elevated in relative terms.

Clean Energy Expansion Amid Carbon Cling

The clean power surge, from wind & solar, is significant: nearly half growth in electricity supply derived from renewables. Yet the steel sector’s share of clean energy remains limited. Although non‑fossil production rose 51.8% in June year‑on‑year, reliance on combustible gases from blast furnace, converter & coke oven lines exceeds 98%, reflecting deep structural dependence on fossil‑based metallurgy.

Emission Equilibrium Exists Elsewhere Yet Eludes Steel

Reddit‑based analysis suggests China’s broader CO₂ emissions may have peaked in 2023, driven by clean energy expansion that supplied 90% of new power demand growth and reduced emissions from construction & cement sectors. Still steel emissions diverged from national trends. The CISA data for June confirms that while overall emissions trend downward nationally, steel remains a stubborn outlier. Global decarbonisation demands urgent sectoral reform if climate commitments, such as peaking before 2030, are to remain credible.

Key Takeaways

• June 2025 steel sector emissions rose by 17.3% year‑on‑year despite a 3.6% drop in energy consumption.

• While pollution levels for SO₂, particulate matter & nitrogen oxides declined significantly, CO₂ surged due to heavy blast furnace reliance.

• Clean energy generation jumped by over 50%, but structural change in production methods remains essential to decarbonise China’s steel industry.