The Global Iron and Steel Slag Market was valued at USD 17.6 Billion in 2023 and is projected to reach USD 22.8 Billion by 2032, growing at a Compound Annual Growth Rate (CAGR) of 2.9% during the forecast period (2024–2032). This growth is propelled by the expanding global construction industry, increasing infrastructure development in emerging economies, and the rising adoption of slag as a sustainable alternative to traditional construction materials like quarried stone and virgin cement.

As the world prioritizes circular economy models and green building practices, the focus shifts to the key industry players who are transforming a by-product into a valuable resource. In this blog, we profile the Top 10 Companies in the Iron and Steel Slag Industry—a mix of global steel giants, specialized processors, and recycling pioneers shaping the future of construction and infrastructure.

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🔟 1. ArcelorMittal

Headquarters: Luxembourg City, Luxembourg
Key Offering: Ground Granulated Blast Furnace Slag (GGBFS), Air-Cooled Blast Furnace Slag

ArcelorMittal, the world’s largest steel producer, is also a leading global supplier of iron and steel slag products. The company leverages its vast steel production network to process and market high-quality slag for cement manufacturing, concrete aggregates, and road construction, promoting circularity within its operations.

Sustainability & Innovation Initiatives:

• Major producer of GGBFS, a key component in low-carbon cement
• Investments in slag processing technologies to enhance product quality
• Committed to reducing CO2 emissions by 25% by 2030

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9️⃣ 2. POSCO

Headquarters: Pohang, South Korea
Key Offering: GGBFS, Steelmaking Slag aggregates

POSCO, a leading South Korean steelmaker, operates an advanced slag business that processes by-products into valuable construction materials. The company’s slag products are widely used in domestic and international infrastructure projects, known for their durability and environmental benefits.

Sustainability & Innovation Initiatives:

• Develops high-value-added slag products for specialized applications
• Focuses on utilizing 100% of its steelmaking by-products

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8️⃣ 3. Nippon Steel Corporation

Headquarters: Tokyo, Japan
Key Offering: Blast Furnace Slag, Steel Slag for civil engineering

Nippon Steel is a key player in the Asian slag market, with extensive operations in processing and distributing slag for use in cement, concrete, and earthworks. The company emphasizes technological innovation to maximize the utility and performance of its slag products.

Sustainability & Innovation Initiatives:

• Pioneering research into new applications for steelmaking slag
• Active participation in industrial symbiosis networks

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7️⃣ 4. China Baowu Steel Group

Headquarters: Shanghai, China
Key Offering: GGBFS, Iron Slag aggregates

As the world’s largest steel producer by volume, China Baowu Steel Group generates and processes immense quantities of slag. The company plays a critical role in supplying the Chinese construction boom with sustainable building materials, supporting national infrastructure goals.

Sustainability & Innovation Initiatives:

• Massive scale of slag processing and utilization
• Key supplier for China’s Belt and Road Initiative projects

Download FREE Sample Report: Iron and Steel Slag Market – View in Detailed Research Report

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6️⃣ 5. CRH plc

Headquarters: Dublin, Ireland
Key Offering: Slag cement, Slag-based construction aggregates

CRH is a global leader in building materials distribution and manufacturing. While not a steel producer itself, CRH is a major processor and marketer of slag through its subsidiaries, integrating it into its broad portfolio of sustainable construction products worldwide.

Sustainability & Innovation Initiatives:

• Leading distributor of slag cement in North America and Europe
• Focus on low-carbon building solutions

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5️⃣ 6. JFE Steel Corporation

Headquarters: Tokyo, Japan
Key Offering: JFE Slag Products (GGBFS, Expansive Additives)

JFE Steel, a major Japanese steel producer, has a dedicated slag business unit that processes by-products into high-quality materials for the construction and cement industries. The company is known for its technical expertise and consistent product quality.

Sustainability & Innovation Initiatives:

• Produces specialty slags for soil improvement and marine applications
• Implements advanced slag cooling and grinding technologies

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4️⃣ 7. Tata Steel

Headquarters: Mumbai, India
Key Offering: Tata TISCON SD (Slag-based product), GGBFS

Tata Steel is a significant player in the Indian and European slag markets. The company markets its slag products under the brand ‘Tata TISCON SD’ for construction, contributing to sustainable infrastructure development in fast-growing economies.

Sustainability & Innovation Initiatives:

• Promotes slag use in green building certifications
• Focus on reducing the environmental footprint of construction

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3️⃣ 8. Harsco Corporation

Headquarters: Camp Hill, Pennsylvania, USA
Key Offering: Slag processing and metal recovery services

Harsco is a specialized industrial services company that provides on-site slag handling, processing, and metal recovery services to steel plants globally. Its unique business model focuses on managing by-products for steelmakers, turning waste into saleable products.

Sustainability & Innovation Initiatives:

• Global leader in industrial environmental services
• Develops proprietary technologies for slag processing and metal reclamation

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2️⃣ 9. Edw. C. Levy Co.

Headquarters: Detroit, Michigan, USA
Key Offering: Processed slag aggregates, slag cement

Edw. C. Levy is a leading North American slag processing company with a long history of servicing the steel industry. The company operates numerous slag processing facilities and is a key supplier of aggregates to the construction industry.

Sustainability & Innovation Initiatives:

• Family-owned business with decades of slag expertise
• Major supplier for infrastructure projects in the Great Lakes region

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1️⃣ 10. NLMK Group

Headquarters: Moscow, Russia
Key Offering: Granulated Slag, Slag Crushed Stone

NLMK is a major Russian steelmaker with a significant slag business. The company processes its steelmaking by-products into materials for the domestic construction market, playing a vital role in Russia’s infrastructure development.

Sustainability & Innovation Initiatives:

• Focuses on maximizing by-product utilization within its operations
• Supplies slag for road construction and industrial applications

Get Full Report Here: Iron and Steel Slag Market – View in Detailed Research Report

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🌍 Outlook: The Future of Iron and Steel Slag Is Circular and High-Value

The iron and steel slag market is undergoing a significant transformation. While traditional applications in construction still dominate, the industry is increasingly focused on high-value applications, advanced processing technologies, and contributing to the circular economy.

📈 Key Trends Shaping the Market:

• Growing demand for GGBFS as a SCM (Supplementary Cementitious Material) to reduce the carbon footprint of concrete
• Innovative uses of slag in wastewater treatment, agriculture, and environmental remediation
• Stringent government regulations promoting industrial waste recycling and sustainable construction
• Collaborations between steel producers and research institutions to develop new slag-based products

Get Full Report Here: Iron and Steel Slag Market – View in Detailed Research Report

The companies listed above are not only supporting global construction—they’re championing the circular economy by turning industrial by-products into foundational materials for sustainable development.