150 years of pioneering

Paul Wurth’s history is marked by more than 100 years of expertise in the design and manufacture of iron-making equipment. We have been integrated blast furnace plant builders for almost 70 years.

Like no other company in the field of iron making, we have been able to build on this foundation with our additional abilities, such as our knowledge and understanding of raw materials, process technology, and operations, control and automation, aspects of upstream and downstream processes, and environmental and emissions control. Continuous improvement and decades of R&D activities have led to innovative solutions for blast furnaces that improve safety, quality, sustainability, and customer benefits. This journey is continuing with our unique and complete range of solutions, technology, and equipment for blast furnace iron making under one roof – at Paul Wurth.

Pathways towards green steel

Three cases for the decarbonization of the steel industry

Plant types

  • Blue blast furnace

    Achieving important CO2 emission reductions in existing plants

    Even before steelmaking customers opt for a complete changeover in technology, gradual and staged – though nevertheless substantial – reductions in the CO2 footprint can be reached in the short and medium term by retrofitting innovative, resource-saving solutions onto the existing installed equipment.

    Currently, Paul Wurth is extending its offering of technologies designed to gradually reduce CO2 emissions in the classic blast furnace process, thereby creating a sensible balance between ambitious environmental targets and economic constraints. Our ‘blue’ blast furnace is capable of substantially reducing the carbon footprint of this established and proven technology.

  • Conventional blast furnace

    Unmatched expertise in the design and supply of the full range of technological solutions

    The Paul Wurth Group can genuinely claim to be the global leader in blast furnace iron-making technology. Almost every medium-to-large blast furnace operating in the world today incorporates state-of-the-art Paul Wurth technology and our products and services cover the whole range of blast furnace equipment and automation.

    In over 230 blast furnace constructions and modernizations worldwide, proprietary Paul Wurth technologies and the expertise of our employees have contributed to our customers reaching their goals: reduced capital and operating costs, efficient project implementation, quick operation ramp-up, reliability, availability, safety, plant hygiene, environmental compliance, and long campaign life.

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  • Top charging

    A modern Bell Less Top® (BLT) is a process-driven technological tool for controlling the blast furnace ‘from the top’, which is complemented by process know-how and mathematical modelling. With more than 800 systems delivered to customers worldwide, original and licensed BLT® technology is being used to produce about 60 % of all blast furnace iron.

    Paul Wurth’s engineers are continuously improving and developing the equipment, features, and application of this pioneering invention.

  • Blast furnace top gas cleaning

    Pollution control and energy recovery

    A high-efficiency top gas cleaning system is vital for reliable operation and prolonged campaign life of gas and blast systems, energy recovery, and steam generation facilities. It allows the plant operators to meet the relevant pollution control standards.

    Thanks to extensive expertise built up over decades, Paul Wurth is an environmental solution provider able to supply technology, systems, and equipment designed to the highest levels of cleaning efficiency, safety, and reliability.

    With more than 140 references in blast furnace top gas cleaning worldwide, Paul Wurth offers proven design, plant, and core components, as well as plant improvement.

  • Tapping

    Stable and reproducible tapping operation

    Stable and reproducible tapping operations are essential for reliable hot metal supply to a steelmaking plant, to ensure hot metal quality and to establish a smooth and efficient blast furnace iron-making process overall. Paul Wurth has extensive experience in the design of modern, highly functional cast houses – whether for new furnaces or for the modernization of existing plants.

    For reliability reasons, Paul Wurth recommends world-class cast house machinery from TMT (Tapping Measuring Technology), a joint company of Dango & Dienenthal and Paul Wurth. TMT’s full range of proprietary cast-house equipment includes fully hydraulic taphole openers, clay guns, and runner cover manipulators as well as tilting runner drives, sampling and measuring devices, and auxiliary equipment.

  • Pulverized Coal Injection

    Cost effective operation

    The reliable, efficient, and accurate injection of auxiliary reducing agents is vital for cost-effective blast furnace operation.

    Paul Wurth has been a driver of the pioneering development of Pulverized Coal Injection (PCI) technologies since the early 1980s; today, more than 80 mid-size and large blast furnaces worldwide operate with our PCI systems.

    Paul Wurth’s PCI plants can support blast furnace operation with injection levels above the 250 kg/thm target. Simultaneously, development is focused on improving the combustion of the coal in the tuyeres/raceway area, which further enhances the customer’s gains in coke replacement.

  • Hot blast generation and supply

    Energy savings and reliable operation

    Our hot blast stove solutions, coupled with heat recovery and blowers / TRT (Tapping Measuring Technology) ensure reliable operation and energy savings.

    Having integrated many decades of experience from various previously leading players in the design and supply of hot blast stoves plants and hot blast systems, Paul Wurth offers tailor-made solutions for your hot stoves, with either internal or external combustion chambers. The portfolio includes impressive and wide-ranging expertise in the modernization of stoves and repairs of all kinds.

  • Slag granulation

    Value-added products from blast furnace slag

    Slag handling is an important aspect of modern blast furnace operation. Today, blast furnace slag is a value-added product for the cement industry, using granulated slag sand as a CO2-friendly substitute for clinker in cement production.

    Paul Wurth has developed the INBA® slag granulation process, incorporating our proprietary dynamic INBA® dewatering drum. With about 300 references, it is the most popular and effective route for processing blast furnace slag in the world.

  • Residue recycling

    Ciroval® - a circular economy approach

    Ecological awareness and responsibility, increasingly stringent environmental regulations, and the ever-more critical supply of raw materials make the application of new metal recovery processes a priority. Today, the steel industry produces by-products that are not fully valued. One of them is the sludge produced by the wet gas cleaning system of the blast furnace, with a high lead and zinc content.

    Taking up this environmental challenge, Paul Wurth developed the CIROVAL® technology, a hydrometallurgical process designed to selectively remove the zinc and lead in order to recycle the entire quantity of blast furnace sludge back to the blast furnace route.

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