• Expertise in Blast Furnace Refractory Relining

    Who We Are and Why Our Expertise Matters

    Our journey began in 2010 with the establishment of Seven Refractories d.o.o., a fast-growing company specializing in the production of high-quality refractory monolithic materials and green resin-bonded taphole clay for blast furnaces.

    As our clients’ needs evolved, it became essential to offer a complete package: engineering, materials, and installation services. Soon, we expanded into maintenance of reheating furnaces, runners, ladles, and many other refractory field, led us to develop the equipment and skilled teams required for blast furnace refractory relining.

    After fifteen years of working inside blast furnaces, improving our installation techniques and upgrading our equipment, we are proud of our achievements and confident in calling ourselves a top player in blast furnace repairs.

    In 2023, Seven Refractories was acquired by RHI Magnesita GmbH, a global leader in refractory products, solutions, and installation equipment—making us part of the number one company in the industry.

    Starting in 2026, the installation department of the former Seven Refractories became a new, independent company dedicated exclusively to installation services: Sipra Service d.o.o., established in partnership with our Italian sister company Sipra S.p.A., a strong and experienced installation provider. This merger allows us to offer our clients not only in the steel industry but across any sector requiring refractory products a high-quality maintenance and installation service.

    Contact us today—it's free of charge! 😉

  • Our Key Services

    Delivering excellence through specialized services.

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    Robotic Blast Furnace Relining

    We deliver specialized blast furnace relining services using advanced robotic systems and shotcrete materials, maximize efficiency and significantly reduce installation time.

    Our experienced team operates and monitors the entire process remotely from a secure control room, ensuring safety from dust, fumes, and toxic gases while maintaining optimal working conditions regardless of external weather.

    Precision installation ensures structural integrity, long-term durability, and optimal material performance with wery low rebound. This includes perfect sealing around cooling elements and achieving a smooth furnace surface.

    Upon completion, the furnace could be restored to operational status in full compliance with original design specifications.

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    Manual Blast Furnace Relining

    We are also highly experienced in manual blast furnace relining, working inside the furnace using dedicated scaffolding or movable platforms.

    This approach significantly improves installation speed, minimizes furnace downtime, and ensures a safe, efficient process.

    Our skilled nozzle operators guarantee perfect sealing of any furnace irregularities, residual wear, or gaps around the interior, leaving the furnace with a smooth surface and meeting precise relining thickness requirements.

    By working in double shifts without interruption, the installation proceeds quickly and without material waste caused by unnecessary cleaning. Continuous application prevents dry joints between shotcrete layers installed at different times.

    Fast, efficient, and safe!

  • Our Recent Projects

    Highlights of our latest successful installations.

    ALPACEM Cyclone 2 January 2026

    ALPACEM Cyclone 2 January 2026

    Pioneering Achievement: 300 Tons of Refractory Shotcrete in 76 Hours

    We have set a new industry benchmark at a local cement plant by implementing the shotcrete method for the first time at this location. This innovative approach allowed us to install nearly 300 tons of refractory material in just 76 hours—a task that typically takes weeks using conventional methods.

    The logistical challenge was immense:
    material was mixed at ground level and pumped through steel piping to heights between 85 and 110 meters. Despite the extreme vertical distance, our equipment ensured a convoy of the material to desired altitude and precise application on walls and roof, significantly reducing the client’s downtime.

    Gratitude for Trust and Excellence
    We sincerely thank our client for their trust and the opportunity to prove this advanced method in practice.
    Most importantly, we commend our dedicated operators. Their expertise in managing high-pressure spraying at 100m+ heights and their flawless coordination made this record-breaking feat possible. Their commitment continues to drive our technical excellence.
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    AFO 4, ADI Taranto, Italy, November 2025

    AFO 4, ADI Taranto, Italy, November 2025

    Successfully completed a hot robotic partial relining of the worn area in Blast Furnace No. 4 at ADI, Taranto. The entire installation process was completed within 24 hours to meet the steel plant’s urgent restart schedule. A total of 220 tons of shotcrete refractory material was applied, fully achieving the client’s target. Overall furnace downtime was limited to just 48 hours.
    BF2, Quermet, Temirtau, Kazakhstan;  Sepetember 2025

    BF2, Quermet, Temirtau, Kazakhstan; Sepetember 2025

    Ex Arcelor Mittal plant, now Quermet, was performed an robotic installation on BF2. Totally installed 560ton of shotcrete material
    BF2, USSteel Košice, Slovakia  July 2025

    BF2, USSteel Košice, Slovakia July 2025

    Successfully completed manual partial relining of Blast Furnace No.2 at USSteel, Košice. The entire installation process was completed within 24 hours. Total of 240 tons of shotcrete refractory material was applied.
    BF5A, Arcelor Mettal, Eisenhuttenstadt, Germany   June 2025

    BF5A, Arcelor Mettal, Eisenhuttenstadt, Germany June 2025

    Another story of success in a German Arcelor Mittal steel plant. Completed in only 20 hours a robotic installation of upper stack in a hot condition. Totaly installed 190ton of shotcrete material.
    AFO2, ADI, Taranto, Italy   April 2025

    AFO2, ADI, Taranto, Italy April 2025

    ADI Taranto, BF2 manual relining using a movable platform. In total 550 ton successfully installed in 2,5 days,
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    BF4, Woest Alpine, Donavitz, Austria Oktober 2024

    BF4, Woest Alpine, Donavitz, Austria Oktober 2024

    First SHOTgun installation in Blast furnace! Shotcrete material was installed bosh and tuyere area as sacrificial layer at first charging of blast furnace after been complete relined by bricks. In total 20 tons of shotcrete material was perfectly installed in only 4 hours.
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    Our Mission

    To provide our costumers top-tier refractory installation services, and solution ensuring maximum efficiency and safety in steel plants operations, especialy reducing a furnace downtime.

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    Our Commitment

    We are committed to delivering high-quality solutions and unparalleled customer service, tailored to meet the needs of our clients.