Analysis

It’s been a good week for carbon capture in cement production with new projects announced in France and Poland.

The first one is a carbon capture and utilisation (CCU) collaboration between Vicat and Hynamics, a subsidiary of energy-provider Groupe EDF. The Hynovi project will see an integrated unit for capturing CO₂ and producing methanol installed at Vicat’s Montalieu-Vercieu cement plant in 2025. It aims to capture 40% of the CO₂ from the kiln exhaust stack at the plant by using an oxy-fuel method and installing a 330MW electrolyser to split water into oxygen and hydrogen for different parts of the process. The CO₂ will then be combined with hydrogen to produce methanol with potential markets in transport, chemicals and construction. The setup is planning to manufacture over 0.2Mt/yr of methanol or about a quarter of France’s national requirement. The project was put forward under a call for proposals by the Important Projects of Common European Interest (IPCEI) program. Pre-notification of its participation in the program has been received from the French government and it is currently being evaluated by the European Commission. Vicat’s decision to choose its Montalieu-Vercieu plant for this project is also interesting since it started using a CO₂ntainer system supplied by UK-based Carbon8 Systems there on an industrial scale in November 2020. This system uses captured CO₂ from the plant’s flue gas emissions to carbonate cement-plant dust and produce aggregate.

The second new project is a pilot carbon capture and storage (CCS) pilot by HeidelbergCement at its Górażdże cement plant in Poland. This project is part of the wider Project ACCSESS, a consortium led by Sintef Energi in Norway that aims to cut carbon capture, utilisation and storage (CCUS) costs and to link CO₂-emitters from mainland Europe to storage fields in the North Sea. The cement plant part in Poland will test an enzyme-based capture method using waste heat at the plant. Another part of the project will look at how the captured CO₂ can then be transported to the Northern Lights storage facility in Norway including the regulatory aspects of cross-border CO₂ transport. ACCSESS started in May 2021 and is scheduled to end in April 2025. It has a budget of around Euro18m with Euro15m contributed by the European Union (EU) Horizon 2020 fund.

HeidelbergCement also says that the second stage of its LEILAC (Low Emissions Intensity Lime And Cement) project at the Hannover cement plant is part of ACCSESS, with both testing of the larger-scale Calix technology to capture CO₂ and the connected transport logistics and bureaucracy to actually get it to below the North Sea. That last point about Calix is timely given that US-based Carbon Direct purchased a 7% stake in Calix in mid-September 2021 for around US$18m. Whilst on the topic of carbon capture and HeidelbergCement don’t forget that the group’s first full-scale carbon capture unit at Norcem’s Brevik cement plant, using Aker Solution’s amine solvent capture technology, is scheduled for commissioning in September 2024. Another carbon capture unit is planned for Cementa’s Slite plant in 2030 but the proposed capture method has not been announced.

Other recent developments in carbon capture at cement plants include Aalborg Portland Cement’s plan to capture and store CO₂ as part of the Project Greensand consortium. The overall plan here is to explore the technical and commercial feasibility of sequestering CO₂ in depleted oil and gas reservoirs in the Danish North Sea, starting with the Nini West Field. The project is still securing funding though, with an Energy Technology Development and Demonstration Program application to the Danish government pending. However, the Danish Parliament decided in December 2021 to set aside a special funding pool to support a CO₂ storage pilot project so this initiative seems to be making progress. If the application is successful, the consortium wants to start work by the end 2021 and then proceed with an offshore injection pilot from late 2022. How and when Aalborg Portland Cement fits in is mostly unknown but a 0.45Mt/yr capture unit at its Rørdal cement plant is tentatively planned for 2027. There’s also no information on the capture method although Aker Carbon Capture is also part of the Project Greensand consortium. Finally, also in September 2021, Chart Industries subsidiary Sustainable Energy Solutions announced that it had selected FLSmidth to help adapt and commercialise its Cryogenic Carbon Capture carbon capture and storage (CCS) system for the global cement industry.

All of this tells the cynics in the audience that a large international climate change meeting is coming up very soon. Most cement companies will likely want some good news to show off when the 2021 United Nations Climate Change Conference (COP26) dominates the media agenda in November 2021. Other observations to point out include that none of the projects above are full-scale industrial carbon capture installations, most of them are consortiums of one sort of another and that they are all subsidised or want to be. While hydrogen and CO₂ networks get built this seems inevitable. Yet, we’re not at the stage where cement companies just order carbon capture units from a supplier, like they might a new clinker cooler or silo, without the need for long lists of partners. When this changes then carbon capture looks set to flourish.

On a final note, the UK is currently experiencing a shortage of commercially-used CO₂. The reasons for this have nothing to do with the cement industry. Yet consider the constant doom-and-gloom about record global CO₂ emissions and the sheer amount of effort going into reducing this by the projects mentioned above and others. Life has a sense of humour at times.

For a view on the CO₂ sequestration permitting process in the US look out for the an article by Ralph E Davis Associates, in the forthcoming October 2021 issue of Global Cement Magazine

Companhia Siderúrgica Nacional (CSN) Cimentos was confirmed this week as the agreed buyer for Holcim’s Brazilian cement business for US$1.03bn. The deal includes five integrated cement plants, four grinding plants and 19 ready-mix concrete facilities. CSN is now poised to become Brazil’s third-largest cement producer by production capacity after Votorantim and InterCement. Or second place if you believe CSN’s cheeky claims about a competitor’s idle capacity!

Figure 1: Map of cement plants included in CSN Cimentos’ deal to buy LafargeHolcim Brazil assets. Source: CSN Investor Relations website.

CSN originally started out in steel production and this remains the major part of its operations to the present day. In 2020 it reported revenue of US$5.74bn. Around 55% of this came from its steel business, 42% from mining, 5% in logistics and only 3% came from its cement segment. CSN’s path in the cement sector started in 2009 when it started grinding blast furnace slag and clinker at its Presidente Vargas Plant at Volta Redonda in Rio de Janeiro state. It then started clinker production in 2011 at its integrated Arcos plant in Minas Gerais. Not a lot happened for the next decade, publicly at least, as the country faced an economic downturn and national cement sales sunk to a low in 2017. From around 2019, CSN Cimentos then started talking about a number of new proposed plant projects elsewhere in Brazil, dependent on market growth and an anticipated initial public offering (IPO). These included plants at Ceará, Sergipe, Pará and Paraná and expansion to the existing units in the south-east. Then CSN Cimentos agreed to buy Cimento Elizabeth for US$220m in July 2021.

It is worth noting that the Holcim acquisition is subject to approval by the local competition authority. For example, the Cimento Elizabeth plant and Holcim’s Caaporã plant are both in Paraíba state and within about 30km of each other. If approved, this would give CSN Cimentos two of the four integrated plants in the state, with the other two operated by Votorantim and InterCement respectively. CSN also stands to pick up four integrated plants in Minas Gerais from Holcim to add to the one it holds at present. Although this would seem to be of less concern due to the high number of plants in the state.

Holcim has made a point of saying that its divestment in Brazil is part of its strategy to refocus on sustainable building solutions with the proceeds going towards its Solutions & Products business following the Firestone acquisition that completed in early 2021. It has also stated previously that it wants to concentrate on core markets with long term prospects. In this context a major steelmaker like CSN diversifying into cement is a contrast. Both industries are high CO₂ emitters so CSN is hardly moving away from carbon-intensive sectors. Yet the two have operational, economic and sustainability synergies through the use of slag in cement production. This puts CSN Cimentos in company with Votorantim in Brazil and JSW Cement in India, two other steel manufacturers that also produce cement. Whatever else happens at the 26th United Nations Climate Change conference (COP26) in November 2021, it seems unlikely that global demand for steel or cement is likely to be significantly reduced. CSN Cimentos is now going to resume its IPO of shares to raise funds for the Holcim acquisition.

Acquisitions are all about timing. The CSN Cimentos-Holcim deal follows the purchase of CRH Brazil by Buzzi Unicem’s Companhia Nacional de Cimento (CNC) joint-venture earlier in 2021. As mentioned above, the cement market in Brazil has been doing well since it started recovering in 2018. The coronavirus pandemic barely slowed this down due to weak lockdown measures compared to other countries. The current run of sales growth may be tapering off based on the latest National Cement Industry Association (SNIC) figures for August 2021. Rolling annual totals on a monthly basis had been growing since mid-2019 but this started to slow in May 2021. Annual sales will be up in 2021 based on the figures so far this year but after that, who knows? A CSN investors’ day document in December 2020 predicted, as one would expect, steady cement consumption growth in Brazil until at least 2025, based on correlated forecast growth in the general economy. Yet fears of inflation, rising prices and political uncertainty ahead of the next general election in late 2022 may undermine this. InterCement, for example, cancelled a proposed IPO in July 2021 due to low valuations amid investor uncertainty. CSN Cimentos may encounter similar issues with its own planned IPO or face over-leveraging itself when it picks up the tab for LafargeHolcim Brazil. Either way, CSN decided to take the risk on its path to becoming Brazil’s third largest cement producer.

Cementa’s prospects for continued mining limestone in Sweden beyond the end of October 2021 have been looking dubious recently. The subsidiary of Germany-based HeidelbergCement wants to carry on mining limestone at its quarries near its integrated Slite plant in Gotland after 31 October 2021 when its current permits expire. However, the Supreme Land and Environmental Court rejected its renewal application in July 2021 on the grounds that the impact of the quarries on groundwater had not been sufficiently investigated. Then the Supreme Court ruled that it had no basis for appeal at the end of August 2021. This leaves the cement producer hanging on for proposed government plans to make legislative changes to keep limestone mining ongoing for another eight months until mid-2022 and then for whatever scheme the legislators cook up next.

In July 2021 construction multinational Skanska publicly said that it was taking the situation ‘seriously’ because its concrete suppliers had warned it of the impending risk that they would potentially be unable to meet demand in the third quarter of 2022. At the same time the Swedish Construction Federation and related bodies noted that up to 175,000 jobs in construction could be adversely affected with a loss of investment of nearly Euro2bn/month due to the predicted cement shortage. In their view, increasing imports in the short term was unrealistic due to capacity constraints at ports and import terminals. Understandably, the Swedish government has been scrambling to keep the quarries open to protect cement supply and has been accused by both the local press and environmental bodies of circumventing legal norms in the process.

This is not a good situation to be in for either Cementa or anyone who might want to use cement locally in the near future. The cement producer operates both of Sweden’s integrated plants, at Slite and Skövde respectively, with Slite holding around 80% of the company’s production capacity. On its own, the Slite plant alone supplies 75% of the country’s cement, with about another 10 – 15% provided by importer Schwenk Zement. As a whole Cembureau data shows that the country’s market was just under 3Mt/yr in 2020 and stable despite the coronavirus pandemic. A small decline in the residential segment was reported, coupled with a ‘flat’ infrastructure segment, although increased demand from wind farm construction was noted. Cementa stopped production at a third local integrated plant, Degerhamn, in mid-2019 due to low profitability at the site and tightening environmental regulations.

Cementa and HeidelbergCement are putting up a fight by publishing lots of information on Cementa’s website about the permit application process and working towards both solutions in the short and longer term. In early September 2021 Nordkalk signed a deal with Cementa to supply it with limestone. However, as Thomas Lind, the head of cement for HeidelbergCement Northern Europe, pointed out in August 2021, the agreement won’t cover the entire shortfall, nor would it be ideal from logistical or environmental angles. On the opposing side, the Swedish Society for Nature Conservation has joined with the Supreme Land and Environmental Court in opposing the quarry permit renewal along with other environmental groups. Plus the government decision to force through a permit reprieve has also given ammunition to its political rivals.

The argument over Slite’s quarry sums up some of the challenges facing society over continued cement production in a world with ever-tougher environmental legislation. Cement plants are likely to face mounting opposition on environmental grounds but most governments will panic when facing the potential consequences of societies running out of essential building materials. There are many ways to avoid this scenario, such as far greater community and political involvement on the part of cement companies, recognition by governments of the importance of building materials, supporting the development and uptake of concrete made with less Ordinary Portland Cement or switching to higher ratios of other building materials and so on. Yet, without preparation, legislators elsewhere will also find themselves in similar positions to the one the Swedish government is in now.

Slite’s problems have arisen in part over a perceived direct threat to local drinking water, although Cementa says that this is absolutely not the case. Typically, cement plants in similar battles find themselves in opposition to local communities due to the immediate impacts of quarrying or production on water, or due to noise or dust. Yet the hidden consequence of clinker production is significant process CO₂ emissions with resulting global climate change. The particular tragedy in Gotland is that HeidelbergCement is one of the more sustainable-minded cement companies, with investment to match. In June 2021 it announced ambitions to upgrade the Slite plant to become the world’s first carbon-neutral cement plant through bio-based fuel substitution and a carbon capture and storage unit by 2030. This may be eight years away but it is one of very few full scale cement plant carbon capture upgrades that have been promised worldwide.

It’s time for a macroscopic view of the Chinese cement sector this week with the release of the half-year financial results by some of the larger Chinese cement producers. On the national level the picture so far in 2021 has been one of continued recovery from the coronavirus lockdowns at the start of the year and then a slowing market as state controls on real estate speculation started to take effect. However, poor weather in the spring and mounting raw material prices appear to have compounded the effects of the real estate regulations, leading to price falls.

Cement output data from the National Bureau of Statistics of China in Graph 1 shows that local production took a knock in the first quarter of 2020 due to the coronavirus pandemic and this strongly recovered in the same period in 2021. The market recovered fast in mid-2020 and so the year-on-year growth for the second quarter was less in 2021. Output on a monthly basis remained ahead year-on-year from April 2020 and stayed ahead until May 2021. However, output in June 2021 was behind the figure in June 2020 and the figure for July 2021 was behind both July 2020 and July 2019.

Graph 1: Cement output by quarter in China, 2019 – mid-2021. Source: National Bureau of Statistics of China.

The Chinese Cement Association (CCA) was lamenting falling cement prices at the start of July 2021. It blamed the situation on slowing infrastructure development in some regions, increasing government restrictions on real estate development, especially poor mid-year weather and higher input prices such as for steel. China Resources Cement (CRC) expanded upon the point about increasing real estate regulations in its financial results for the first half of 2021 explaining that the Chinese government has been promoting a policy that aims to ensure that “residential properties are not for speculation” including controls on the financing of real estate. Later in mid-August 2021 the CCA reported that prices were recovering in east and central-southern regions although the situation remained poor in Guizhou province with shipments down to 60% of normal levels. Production control measures are expected to be implemented to stabilise the situation.

Graph 2: Sales revenue of large Chinese cement producers in first half of year, 2019 – 2021. Source: Company reports.

On the corporate side the sales revenue from some of the large Chinese cement producers mostly show the usual gap-tooth pattern that coronavirus has created everywhere as the market recovered. Notably Anhui Conch managed to avoid falling sales year-on-year in the first half of 2020. However, the CCA’s observation above about rising input costs is visible in the falling profits of some (but not all) of the companies covered here. For example, Anhui Conch’s net profit fell by 7% year-on-year to US$2.32bn in the first half of 2021. It blamed this on a significant rise in the price of raw coal. CRC also reported falling profits attributable to increased production costs.

CNBM reported an increase to cement and clinker sales volumes of 7.6% to 177Mt and concrete sales volumes by 13.4% to 52Mm³. It noted that, “In the first half of 2021, the national cement market showed the characteristics of high price level fluctuation adjustment.” From January to April 2021 local fiscal policy boosted demand for cement but from May 2021 continuous heavy rainfall and increasing bulk commodity prices slowed infrastructure project development. Anhui Conch’s cement and clinker sales volumes for both production and trading grew by 11.5% to 208Mt. It reported stable market demand in eastern, central and southern regions but noted falling prices in the west.

Looking ahead, two issues, among many, to consider are carbon trading and imports. The former has been coming for a while and was launched formally online nationally in mid-July 2021 for the power generation industry. The carbon price was nearly Euro7/t in late July 2021 in China compared to around Euro53/t in the European Union. Cement and steel are expected to join the Chinese national scheme in the next phase although analysts believe that issues such as data gathering, permit allocation rules, accounting standards, sector reduction targets and related financial support all need to be improved before this can happen. Imports are a connected issue and it has been interesting in recent months to hear financial analysts point out the risks, for example, of major exporting nations such as Vietnam relying on China so much. The CCA reckons that China imported 33.4Mt of clinker in 2020, an increase of 47% year-on-year, with 60% of this derived from Vietnam. With the Chinese government trying to tackle cement production overcapacity and meet growing environmental targets, imports look set to become a ‘hot ticket’ issue. In this context it is telling to see talk from the CCA of ensuring standards for imports such as verified carbon emissions. Naturally, the imports that could be trusted the most will probably be the ones from plants that Chinese cement producers have built themselves overseas. As waste importers into China found out previously, relying heavily on one market with strong state controls carries considerable risks. Cement exporters in South-East Asia take note.

Holcim Schweiz hit a milestone recently with the aerial drone programme at its Siggenthal cement plant. The project with Voliro, a Switzerland-based technology start-up, has started to use multi-rotor drones to conduct official measurement flights. They used them to take measurements to determine the steel wall thicknesses of the cement kiln and the cyclone preheater. The work has been part of Holcim’s ‘Plants of Tomorrow’ industrial automation plan with unmanned aerial vehicles (UAV). Key features of the particular drones being used are that they can be rotated around all axes by a special rotor system and can even fly upside down.

Holcim has been using drones in and around cement plants for a few years now. When it launched the Plants of Tomorrow plan in 2019, Switzerland-based drone supplier Flyability said that the cement company had chosen its Elios 2 model to perform confined space inspection. Earlier in 2017 another supplier, SenseFly, said that LafargeHolcim Tanzania had been using its fixed-wing products. Holcim is also far from alone in its use of drones. A few examples among many include Cemex USA’s work with Kespry earlier in 2021, HeidelbergCement’s work in North America and Germany in 2020 and 2021 and Votorantim’s testing at its Córdoba and Niebla plants in Spain back in late 2015. 

UAV usage by armed forces dates back to examples like unmanned incendiary balloons being deployed in the 19^th century to Azerbaijan’s reported decisive use of drones in its war against Armenia in late 2020. The current era of industrial UAVs began after 2000 when governments starting issuing civilian permits, miniaturisation occurred and improvements in cameras, sensors and computing power followed. For the mineral processing sector the trend started with drones being used for stockpile management and quarry surveying. At present this is the main area that UAVs are used for by the sector, often coupled with photogrammetry techniques. CalPortland’s Adam Chapman’s paper at the 2021 IEEE-IAS/PCA Virtual Cement Conference described one company’s use of UAVs in the cement industry since 2016, looking at licensing, cost, quality of data, drone technology, fleet management and field experiences.

More recently though, tests of drones used to survey cement plant buildings and structures have started being publicised such as Holcim’s work at Siggenthal. A presentation by consultant John Kline and Chris Place of Exelon Clearsight summarised the use of drones for structural inspection at cement plants at the Global CemProducer 3 webinar in January 2021. The key benefits they promoted of using an UAV in this way were: improved safety because workers have reduced risk from climbing, working at height or in confined spaces; less time to conduct a survey; higher resolution photographs and video; better coverage through grid method surveying; and an overall lower cost. However, on that last point, other commentators have noted that market-leading drones for surveying are relatively expensive and easy to damage. Drones have since been used to start going inside structures at cement plants with Kline demonstrating their use to inspect the condition of refractory within the cooler, kiln, pre-heater and cyclone of a production line at the Global CemProducer 2 webinar in July 2020. HeidelbergCement has also been doing similar things, with an inspection trial using a drone of the kiln at the Schelklingen plant in Germany during the 2021 maintenance shutdown period at the site.

So far the use of drones by the cement industry has mostly been in a surveying or inspection capacity. Given the short time that UAVs have been used like this there is likely to be scope for lots more development both within existing fields and new ones as the sector works out how best the technology can be used. One application we couldn’t find in the research for this short article was the use of drones for security and surveillance tasks at cement plants and quarries although this may be happening already. However, there could be a more active role for drones if or when a company finds a way for them to start making basic repairs or carrying out simple maintenance in those hard to reach areas that drones excel at accessing. Research examples exist of UAVs being used to spray concrete or repair materials onto minor defects in concrete structures. Yet considerable challenges face these kinds of applications such as the weight of a loaded multi-rotor drone or damage from rebound. Before we all get too worried about drones replacing our jobs though it is worth considering that Amazon’s plan to deliver packages by UAV was first announced in 2013 and it still hasn’t happened yet. It may yet, but for now in most situations humans remain cheaper and more practical than robots or drones.