Displaying items by tag: Alternative Fuels

This week we covered Capitol Aggregates’ order of an alternative fuels (AF) system from ATS Walter USA. The story is notable because it is an AF project for a cement plant in the US. Thermal substitution rates (TSR) of AF in the US have typically been lower than in the European Union (EU), but this could be changing.

The order was confirmed publicly at the end of September 2025. The subsidiary of ATS Group will supply a solid AF metering and conveying system to the integrated plant in San Antonio, Texas. The system will include a moving floor receiving station, chain belt conveyors, a screen and a separator, dosing equipment, an air-supported belt conveyor and an injection system. ATS Walter says that, by the end of 2026, it will have supplied four AF projects in North America. As an aside, Capitol Aggregates also mentioned in the press release that it “...views sustainability as essential to long-term success.” This sentiment is backed up by the fact that the plant built an early commercial carbon capture unit in the 2010s!

Data from the American Cement Association (ACA) revealed that the AF TSR in the US reached 16% in 2023 from 14.6% in 2022. This compares to a 58% rate in the EU in 2022. It is also worth noting that, in the US the share of gas in the cement industry energy mix rose from 25% to 31%. The ACA attributed this change to a falling price of gas. It added that the coal and petroleum share of the fuel mix fell to its lowest level since 1974. The point here is that the energy mix used by cement plants changes over time regardless of sustainability trends.

Research by LEK Consulting estimated that 60 of the 87 cement plants in the US had a TSR of below 20% in 2023. 39 of these were believed to have a TSR of under 5%. It summarised that hazardous waste and tyre-derived fuels have tended to predominate in the US compared to refuse-derived fuel (RDF) in the EU and elsewhere. LEK went on to say that its research suggested that a quarter of cement plants in the US were likely to install an AF feeding system in 2024 or 2025. This is likely to be the highest rate of AF uptake in the US cement sector to date.

The ACA reckons in its sustainability roadmap that with the right policies and regulations the country’s AF TSR could reach as high as 50%. Its policy suggestions include: reduce permitting barriers to use of so-called non-hazardous secondary materials (NHSM) fuels in industrial manufacturing; treating waste-to-industrial energy as valid recycling use; building robust recycling infrastructure and markets that incentivise the use of non-recycled material streams as industrial AF; community education and support for use of low carbon AF; and increasing the use of NHSMs to divert these materials from landfills. This can be mostly summarised as supporting the uptake of RDF through better permitting and building up the infrastructure and markets for it. LEK also identified the same issue. It called for the adoption of landfill reduction targets or zero-landfill policies by commercial and industrial waste generators. However, LEK believes that, even if this were done, current sources of high-quality RDF in the US would not be able to increase the TSR to even 20%.

News from Capitol Aggregates and others about AF projects in the US are encouraging. If LEK’s research is indicative then a step change in the TSR in the country’s cement sector is already underway. The beauty of AF usage is that it can both potentially cut fuel costs and reduce CO₂ emissions. It won’t be easy as new supply chains for refuse byproducts are built and utilised. Yet, as the ACA is advocating, it is possible and worthwhile.

The 1st CemFuels Asia Conference will take place in Bangkok in February 2026 and the 19th Global CemFuels Conference will take place in September 2026 in Geneva

India: Recycling equipment manufacturer Fornnax Technology has launched the R-MAX3300, its largest secondary shredder, at IFAT India 2025 in Mumbai on 14 October 2025. The machine is designed to process low-density waste streams such as municipal solid waste, commercial and industrial waste, bulky waste, legacy waste, wood waste and construction and demolition waste. The R-MAX3300 produces refuse-derived fuel (RDF) and solid recovered fuel (SRF) with particle sizes between 30 and 50mm.

Director and CEO of Fornnax Technology Jignesh Kundaria said “With the rising challenges of waste management in India and globally, this machine is not just a product; it’s a powerful tool for change. We engineered it to handle the most difficult waste streams with unparalleled efficiency, turning what was once considered unusable waste into a valuable resource. It directly addresses the urgent demand for effective, large-scale shredding technology that can support cement kilns and waste-to-energy facilities in achieving the desired output.”

According to the company, India currently generates over 160,000t/day of municipal solid waste. Simultaneously, the global industrial shredder market is expected to grow at a 5-6% CAGR, driven by stricter recycling regulations and increasing waste generation.

Bolivia: The municipal government of Santa Cruz de la Sierra has signed an agreement with Itacamba Cemento to recycle thousands of end-of-life tyres (ENDTs) into alternative fuel for cement production, according to the El Deber newspaper. The initiative was implemented through the Municipal Waste Management Company (Emacruz).

Under the agreement, discarded tyres collected from landfills will be transformed into thermal energy for use in Itacamba’s cement kilns, reducing waste and fossil fuel consumption. The tyres will be incinerated at temperatures exceeding 1400°C, with monitoring and gas-capture systems employed to prevent harmful emissions.

Mayor Jhonny Fernández said “We guarantee the responsible disposal of thousands of tonnes of tyres that would otherwise cause pollution or become breeding grounds for diseases like dengue. This is our tangible contribution to a healthier environment and better quality of life for our citizens.”

Itacamba Cemento general manager Marcelo Morales said “Co-processing is a globally recognised waste management method that complies with the waste hierarchy. Our kiln enables the complete and safe destruction of non-recyclable materials.”

US: ATS Walter USA has announced that it will supply Capitol Aggregates’ San Antonio cement plant with a metering and conveying system for solid alternative fuels (AF), with the aim to improve fuel handling and decrease CO₂ emissions at the plant. The system includes a DoseaFloor moving floor receiving system, chain belt conveyors, separator and screen, Doseahorse dosing equipment, Walt’Air air-supported belt conveyor and injection system. The project, to be completed by the end of 2026, will be ATS Walter USA’s fourth AF project in North America.

France: Cement producer Eqiom has inaugurated a €2.5m pilot station for the continuous injection of alternative fuels at its Rochefort-sur-Nenon plant. The new facility enables the injection of wood fines - treated wood residues sourced from local sawmills - directly into the kiln at a rate of 5000t/yr.

The facility has reduced its coal use from 30,000t/yr to 8000t/yr. Currently, more than 70% of the plant’s kiln fuel comes from alternative sources, with the site now targeting 80%. Since the 1990s, the plant has successively used liquid chemical waste, animal meal and solid recovered fuels (SRF), which together accounted for 50,000t in 2024. Eqiom is also developing new cement types with lower clinker content by incorporating more pozzolans, as part of its broader decarbonisation efforts.

Pierre Bernard, Eqiom’s head of cement manufacturing, noted that national cement production fell from 20Mt/yr in 2022 to 15Mt/yr in 2024, equivalent to 1960 levels, due to a decline in construction activity.

Bulgaria: Zlatna Panega Cement, part of Greece-based Titan Group, has achieved a 65% rate of thermal substitution of fossil fuels with alternative fuels for four consecutive months. The company’s 5MW solar plant supplies between 11% and 13% of its energy needs.

General director Adamantios Francis said “We have achieved a historic success for our plant. With this, we prove that we are committed to sustainable development and are ready to lead the industry towards a greener future.”

Titan Group’s long-term strategy includes cutting energy consumption by 58% compared with 2020 levels and reducing direct net CO₂ emissions to 500kg/t of cement. At Zlatna Panega, CO₂ emissions in 2024 were 839kg/t of clinker, while electricity-related emissions fell by 38% year-on-year.

Belarus: The country’s cement sector is intensifying efforts to use refuse-derived fuel (RDF) in cement production, according to the state information agency Belarus Telegraph Agency.

Belarusian Cement Company introduced an RDF processing line in 2021 at OAO Krasnoselskstroymaterialy in Grodno Oblast, enabling full incineration of RDF supplied by local waste-processing plants. Contracts are reportedly already in place with RDF suppliers for 25,000t of the fuel to be delivered by the end of 2025.

In September 2025, industrial trials of RDF made by Minsk-based Ekores will begin. If successful, shipments from the company could double from 15,000t to 30,000t, raising total RDF use to 40,000t in the final quarter of 2025.

Plans are also underway to expand RDF infrastructure in 2026, with a regional municipal waste management and RDF production complex under construction near Volkovysk.

South Korea: The Ministry of Environment has announced a pilot project to recycle waste fabric scraps from sewing factories into alternative fuel for the cement industry. The agreement has been signed with: textile companies Pang Rim, Sewang, Sinhan Spinning & Textile; cement companies Ssangyong C&E and Asia Cement; and the Korea Recycling Service Agency (KORA). It expands on an earlier initiative launched in 2024 with four Seoul districts.

Under the project, fabric scraps that were previously incinerated or landfilled will be separated, sorted and processed into intermediate fuel, which cement plants will use in the production process. The Ministry said that KORA will support raw material supply and recycling logistics, while cement firms will adopt the fabric-derived fuel to reduce waste and fossil fuel use.

Kim Go-eung, Director General of the Resources Circulation Bureau, said “The separation, sorting and recycling of waste are essential elements for producing high-quality recycled raw materials. To establish a circular system, we will continue to identify and expand various measures so that the supply of excellent recycled raw materials and the securing of demand sources can be balanced.”

India: Tiruchi Corporation has intensified efforts to manage non-recyclable plastics by diverting them to cement plants for use as alternative fuel. The city generates 400 - 450t/day of waste, of which about 75% is segregated at source. Non-recyclable plastics are collected through door-to-door systems and sent to Dalmia Cements’ and UltraTech Cement’s plants, where they are used as refuse-derived fuel (RDF) in the kilns. Since July 2024, 2384t of plastics have been diverted to cement plants.

An upcoming automated material recovery facility at Ariyamangalam, with a capacity of 250t/day, is expected to further improve segregation, ensuring recyclable, non-recyclable, inert and RDF streams are directed to cement plants for reuse.

There have been a few burner and related stories to note in the cement industry news this week. Firstly, Canada-based PyroGenesis announced that it had signed a deal with an unnamed-European cement company to supply a plasma torch system for a ‘calcination furnace.’ Around the same time UBE Mitsubishi Cement (MUCC) revealed that it had successfully tested natural gas co-firing at MUCC’s Kyushu Plant using a newly developed burner.

The PyroGenesis project is a potential game-changer for the sector because it alters the way cement production lines are heated. Roughly one third of CO₂ emissions associated with cement manufacture arise from the fossil fuels used to heat the kiln and the pre-calcination system. Cut out some of that and the specific CO₂ emissions of cement production drop. PyroGenesis’ approach uses electricity to generate high-temperature plasma. This then gives the cement plant the option of obtaining its electricity from renewable sources. PyroGenesis signed a memorandum of understanding with the power conversion division of GE Vernova in March 2025. This had the aim of targeting high temperature processes, such as cement production, with electric plasma torches. The current deal with a cement producer has been valued at US$871,000 with delivery to the client scheduled for the first quarter of 2026.

We don’t know who the mystery client might be. However, Heidelberg Materials reportedly operated a 300kW plasma-heated cement kiln at its Slite cement plant in February 2025 as part of the ELECTRA project. The producer said it had achieved 54 hours of continuous operation, with 60% CO₂ concentration in the flue gas. The aim was to reach 99%. It then said that it was planning to build a larger 1MWel furnace at its Skövde cement plant in 2026 with tests to continue in 2027. In an interview with Global Cement Magazine in May 2025, Heidelberg Materials said that it was using commercially supplied CO₂ as the ionising gas in the plasma generator but that it was considering using captured CO₂ from the production process in the future. It also mentioned issues from its trials such as the effective ‘flame’ being hotter than the conventional process but not as long. This increased the reactivity of the resulting clinker. Finally, Heidelberg Materials noted from a feasibility study that a 1Mt/yr cement plant would need around 170MW of plasma generation, but that typical plasma generators topped out at around 8MW. Hence, any full set-up would likely require multiple plasma generators. For more on non-combustion style kilns see GCW561.

UBE Mitsubishi Cement’s burner installation is more conventional but again it is concerned about sustainability. In this case the line has tested burning natural gas. The cement producer says it is the first such installation at a cement plant in Japan to do so commercially. The burner was jointly developed by UBE Mitsubishi Cement, Osaka Gas and Daigas Energy. Firstly, the plant will consider switching to natural gas. This will reduce the unit’s CO₂ emissions from fuel combustion. However, a later step being considered is to move on to e-methane. This is a synthetic methane made from CO₂ and hydrogen using renewable energy.

Finally, another recent story on this theme is the installation of a new satellite burner by Northern Ireland-based Mannok at its Derrylin cement plant in August 2025. This is Phase One of a two-part project to upgrade the pyro kiln system at the site. The cement company worked with FLSmidth on the €2.5m upgrade. The new burner has now allowed the plant to burn solid recovered fuel (SRF) by up to a 30% substitution rate in the kiln. This followed a project, also with FLSmidth, to install a FuelFlex Pyrolyzer in 2022. This is used to replace coal with SRF in the pre-calcination stage of cement production. Phase two will be an upgrade of the main burner to a new Jetflex burner. Once this part is completed, Mannok is aiming for an overall substitution rate of 65 - 70% on the whole pyro-processing system.

Burners at cement plants are replaced fairly commonly. However, the supplier companies don’t advertise every installation due to the commercial relationships with their clients and other factors. Hence the more interesting upgrades tend to get the publicity. Typically this means if a burner uses new technology, meets sustainability goals and so on, we find out about it. It’s a similar situation when a new heating technology such as plasma is trialled. Changing trends in fuel types for cement plants suggest different types of conventional burners. Some of this can be seen in the burner stories above with the trend moving towards ever higher rates of alternative fuels usage. Combustion in cement kilns is here to stay for the time being but plasma trials will be watched carefully.

The 18th Global CemFuels Conference & Exhibition on alternative fuels for cement and lime 2025 will take place in Milan on 17 - 18 September 2025