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Steel is everywhere in our lives and central to making modern society sustainable.
Steel provides the solutions to infrastructure and construction needs around the world. It is the material to build climate resilient cities and coastal protection. Steel protective design minimises the impacts of natural disasters.
Today global population growth combined with improvements in standards of living are exerting pressure on the world’s ecosystems. Increased emissions of CO2, use of scarce resources and growing challenges to the disposal of waste are the results. Steel is at the heart of delivering solutions to many of these challenges.
Steel is infinitely recyclable and its by-products and waste energies are valuable resources. The steel industry is integral to the global circular economy and thus the successful delivery and maintenance of a sustainable future.
The steel industry has made significant reductions in greenhouse gas emissions in the past decades by improving energy efficiency and deploying new technologies and practices resulting in benefits to the environment and economies. Reducing greenhouse gas emissions is a global challenge that requires a global solution. The steel industry believes it is very important to be actively engaged as we continue to strive to move towards a low carbon society.
Governments, the steel industry and other stakeholders will all need to collaborate in order to overcome the technological and economic challenges involved to ensure progress.
Steel is a major driver of economic success - providing critical products, employment, revenue and investment in modern economies. Lack of unity and cohesion between government departments without a clear future-focussed steel industry strategy leads to short term, ill-considered and damaging regulation that limits industrial development.
The OECD Council states that “Attempts to price carbon implicitly or explicitly will have distributional consequences that may be contentious. It requires the determination and creativity of governments to find the right level of arbitrage between the economic efficiency and the political and social sustainability of climate policies.” Since as much as 35% of steel is traded internationally, policies must promote a level playing field to ensure that steel companies in one region are not put at a disadvantage with steelmakers from other regions or in relation to competing materials. Furthermore, if these mechanisms are to be successful with regard to both production process improvements and consumer behaviour, they must not result in relocation of steel production. A global level playing field and consistent application of comprehensive market based approaches are necessary conditions to ensure a fair treatment of the related financial and trade implications throughout the value chain.
Governments should take into account the full life cycle of products when creating new regulations. Only by doing this, can the actual impact of each stage of a product’s life be calculated and efficiently addressed. Today too often regulations focus only on the production phase or the use phase of a product ignoring the full life cycle, leading to inappropriate material selection. Taking the life cycle into account will help to create reliable and predictable frameworks for cost effective energy and environmental policies.
Governments around the world at national and regional levels need to prioritise the collection and recycling of end-of-life steel products. This should also be extended to all products. Policy should not encourage use of materials that cannot be comprehensively recycled and thus end up in landfill.
The inherent risk of failure associated with the long term research, development and implementation of new technologies requires a partnership between the steel industry and national and regional governments. Considering the need for breakthrough technologies including reuse of CO2 and the potential benefits to society, policy should support funding for environmentally focussed research and development. Any future climate agreement should include provisions on technology transfer, climate risk management mechanisms and international funding for public-private partnerships either individually or collectively.
The circular economy refers to a move from linear business models, in which products are manufactured from raw materials, used and then discarded, to circular business models where products or parts are repaired, re-used, returned and recycled. This concept is fundamental to the triple bottom line concept of sustainability, which focuses on the interplay between environmental, social and economic factors. This should all be based on a life cycle approach.In a well-structured circular economy, steel has significant advantages over competing materials. Four keywords define these advantages: reduce, reuse, remanufacture and recycle. These are all benefits of steel.
However, continuing to fulfil a positive role in our sustainable future comes with some major challenges:
The use of steel scrap reduces carbon emissions from the steel life cycle. Steel is a unique material in its capacity to be continually recycled without loss of properties or performance. This, in combination with a long history of significant efforts to increase recycling rates, has resulted in steel leading the recycling statistics, for example in cars and cans. But recycling is limited by the availability of scrap due to the long life of steel products for example buildings and bridges. Reducing the amount of pre-consumer scrap generated when steel products are transformed into final consumer goods (up to 50% of the scrap generated today) would also have a large impact. Policies can provide further support for recycling by
placing emphasis on recyclability and design for dismantling.
The production of steel results in the generation of byproducts that can reduce CO2 emissions by substituting resources in other industries. For example, blast furnace slag is used by the cement industry allowing it to reduce its CO2 emissions significantly. Steelmaking slags are also used as civil works aggregates thereby saving natural resources and reducing environmental impact. worldsteel believes that by-productsshould receive fair treatment as they contribute to the conservation of resources. Application standards would ensure that all potential materials for a particular application compete on the same terms.
In the last 50 years, the steel industry has reduced its energy consumption per tonne of steel produced by 60%. Waste energies are also captured and used effectively. However, due to this dramatic improvement in energy efficiency, it is estimated that there is limited room for further improvement on the basis of existing technology. A recent worldsteel study shows that the average energy intensity for steel production is 20 GJ/t crude steel with a potential for improvement of 15-20%. It is interesting to note that the plants with low energy intensity do not necessarily have the most advanced equipment but their performance tends to be the result of optimal operating knowledge and operational control systems.
In many applications, steel has a very long service life and as a result the contribution of modern steels in improving the energy efficiency of buildings, plants, machinery and transportation is very important. Avoided CO2 emissions from the use of steel in high grade applications are on average 6 times higher than the CO2 emissions from the production of these advanced steels. For example, high strength steels reduce the weight of trucks allowing them to carry more goods for the same amount of CO2 emissions per km and improved electrical steels produce much more efficient transformers and motors thereby significantly reducing the total energy needed throughout their lives. Steel also enables recycling of other materials through vital recycling equipment thereby fulfilling an important role in the circular economy. A key contribution from the steel industry is to work closely with its customers in optimising the design and use of steel.
In order to continue these efforts and to identify all the opportunities to reduce the carbon emissions from steel’s life cycle, it is essential to take a full life cycle approach. This not only considers the emissions associated with the manufacture of steel products, but also the reduction in energy
consumption from the use of new-generation steels in lighter and stronger products. Furthermore, the inherent recyclability of steel must be duly accounted for in material decision making. The recycling of steel also reduces the burden of disposal in landfill facilities and prevents the accumulation of otherwise abandoned steel products.
Unlike with energy production, the carbon emissions profile of materials is very variable and extended over a long lifetime. Steel, which has low manufacturing emissions when compared to low density materials such as aluminium and carbon fibre, also provides benefits for generations to come since it can be recycled over and over again without loss of properties and with a considerable carbon benefit.
Governmental support of Life Cycle Assessment initiatives is essential. Policies aiming to reduce carbon intensity of material use should provide a correct signal to consumers and designers on the overall impact of their choices in a comparable way and for all materials.
The global steel industry is working together on a number of dedicated initiatives.
Keeping total global CO2 emissions at the current level or better depends on the development and introduction of radical new steelmaking technologies with a lower carbon footprint, including reuse of CO2. This approach may prove successful and will help to lower the emissions for the steel industry; for example:
In Europe, HIsarna has been shown to be successful at pilot plant scale. HIsarna is funded via a combination of public bodies and European steelmaking consortium partners. In Japan, another R&D programme “COURSE50”, supported by the government, is currently proceeding from a laboratory to a pilot phase.
In North America, work is continuing under the American Iron and Steel Institute’s CO2 breakthrough programme with co-funding support from the US Department of Energy to develop an innovative flash ironmaking process. Furthermore, the Pacific Rim countries collaborated in a summit to produce a technology handbook titled State of the Art Clean Technologies (SOACT) to share technology and energy efficient steelmaking processes. Elsewhere, other initiatives (notably the POSCO programme in Korea and the China Steel Corporation programme in Taiwan) continue to make progress.
Carbon capture, utilisation and storage technologies, are not yet mature for the steel industry and will require government and public support to become viable options.
Furthermore, worldsteel provides a forum in which these various national and regional research and development programmes can exchange information on their projects and share best practices.
Over the past 20 years, worldsteel has established and made available the largest and most authoritative database of life cycle inventory data for the production of a wide range of steel products based on actual data received from its members worldwide. This database is being updated in 2015 (2014 steel production) for more than 16 steel products and will be available as global and regional average data. This LCI database is being used extensively by steel customers, academia and other stakeholders in taking a life cycle approach.
worldsteel has a number of market development programmes that focus on improving the energy efficiency in steel-using sectors.
The WorldAutoSteel partnership has a major programme for optimising steel use in future vehicles, including electric and hybrid.
worldsteel is further investigating good examples around the world where steel is more predominately used in infrastructure and large public buildings as well as offices and residential buildings and where these provide better energy efficiency and/or climate resilience. The purpose is to share techniques or designs.
worldsteel members have developed and agreed a common calculation methodology for the CO2 footprint of steel plants. This methodology was subsequently transformed into an international standard (ISO 14404:2013). worldsteel encourages all its members, and indeed non-member
companies, to participate in its climate action programme, which is the collection and reporting, on a confidential basis, of CO2 emissions plant-by-plant using the methodology. From the start of the programme, in 2008, participating steel plants have been actively measuring where they are
among peers in terms of CO2 emissions, evaluating their own trend of emissions, setting up priorities for improvement and monitoring progress.
The Climate Action methodology has now been widely adopted throughout the steel industry. The data is being used in public communications such as sustainability reports and websites.
For the list of Climate Action members, click this link.