Metso Sets Benchmark with Grate Kiln, Delivering Superior Iron Ore Pellet Quality for DR Processes

Why It Matters

Higher‑quality pellets lower fuel consumption and emissions in DRI plants, accelerating the steel industry’s transition to greener production methods.

Key Takeaways

• Metso's Grate Kiln improves pellet strength and reducibility.
• Independent control of grate, kiln, cooler enhances flexibility.
• Supports biomass and hydrogen fuels for greener steelmaking.
• Digital solutions cut energy use by several percent.
• Over 55 installations deliver 150 Mt annual pellet capacity.

Pulse Analysis

The steel sector is under pressure to slash carbon emissions, and direct‑reduction iron (DRI) offers a lower‑carbon pathway compared with traditional blast furnaces. Central to DRI efficiency is the quality of iron‑ore pellets; inconsistencies can drive up energy use and increase furnace downtime. Metso’s Grate Kiln addresses this challenge by delivering uniformly heated pellets with high cold‑crush strength and controlled porosity, attributes that improve reducibility and reduce the need for excess fuel in the reduction process.

Technical innovation underpins the Grate Kiln’s market appeal. Independent control of the grate, kiln, and cooler allows operators to fine‑tune temperature profiles for diverse ore blends, while proprietary burners enable the use of alternative fuels such as biomass and hydrogen. Integrated digital solutions monitor key parameters in real time, delivering process stability and enabling energy‑saving adjustments that typically shave a few percent off overall consumption. The system’s heat‑recovery loops further lower operating costs, delivering a compelling total cost of ownership for plant managers.

Globally, more than 55 Metso Grate Kiln installations now supply over 150 Mt of pellets annually, positioning the company as a benchmark provider in the pelletising market. This scale not only validates the technology’s reliability but also accelerates adoption among steelmakers seeking to meet tightening emissions regulations. As the industry pivots toward low‑carbon steel, solutions that combine performance, flexibility and digital intelligence—like Metso’s Grate Kiln—will become essential components of future production portfolios.