Displaying items by tag: electric kiln

Sweden: SaltX Technology has secured a new grant from the Swedish Energy Agency for its project ‘Demonstration of new electric kiln technology at industrial scale to enable emission-free cement production.’ This funding follows previous support for testing and optimising electric quicklime production at its test and research facility in Hofors, Sweden. The grant aims to adapt and test SaltX's technology specifically for cement production, awarded under the pilot and demonstration program. It constitutes partial funding for the work that is planned to begin in March 2025 at the company's test and research facility.

Acting CEO of SaltX, Lina Jorheden, said "It is very encouraging that the Swedish Energy Agency supports us in our work to commercialise SaltX's electrification technology for the cement industry. The grant is an important component in the upcoming industrialisation phase."

Switzerland: The Global Cement and Concrete Association (GCCA) is holding its Innovandi Global Cement and Concrete Research Network (GCCRN) Spring Week at the École polytechnique fédérale de Lausanne (EPFL) campus on 22 – 26 April 2024. 450 delegates from over 40 academic institutions will attend the event, featuring workshops, idea exchanges and progress reviews focused on the decarbonisation of cement and concrete by 2050. Topics include the use of AI, alternative materials and processes, concrete recycling, renewables, kiln electrification and carbon capture.

GCCRN industrial chair and Cemex global research development vice president and Davide Zampini said “If we are to reach our goal of net zero concrete by 2050, then we cannot do so alone. We need to explore as well as harness solutions and collaboration well beyond our industry. That’s why Spring Week is so important.”

GCCRN scientific chair Karen Scrivener said “Everyone here at EPFL is proud to be hosting this year’s Spring Week, anticipated as our largest gathering yet, marking a significant milestone in our journey toward net zero research.”

India: JSW Cement has appointed Finland-based Coolbrook to install its RotoDynamic Heater electric kiln technology at the Vijayagar steel works and slag and cement grinding plant in Karnataka. Press Trust of India News has reported that the partners expect the technology to reduce the CO₂ emissions of the plant’s slag cement.

Read about the applications for the RotoDynamic Heater in cement production in this Global Cement interview with Coolbrook CEO Joonas Rauramo.

India: Sweden-based SaltX Technology has partnered with Dalmia Cement (Bharat) to launch a pilot trial of fuel-free cement production using its electric arc calciner (EAC) in 2024. The pilot plant will be situated at Dalmia Cement (Bharat)’s Rajganga Nagpur cement plant in Odisha. Pre-study work, including material tests at SaltX Technology's test and research centre in Hofors, Sweden, will commence in early 2024.

Dalmia Cement (Bharat) managing director and chief executive officer (CEO) Mahendra Singhi said "In line with our ambition to further reduce our carbon footprint, we are delighted to collaborate with SaltX, a leading innovator with electrification and carbon capture technology that has great potential to play a decisive role in our intense work to reduce our carbon emissions."

SaltX Technology CEO Carl-Johan Linér said "I am pleased to confirm that we have now started working together on-site for the upcoming pilot in India. We have met all key individuals in the project and look forward with confidence to starting the pre-study next year."

India: UltraTech Cement has announced a plans to install a RotoDynamic Heater (RDH) supplied by Finland-based Coolbrook at one of its cement plants. The RDH uses renewably powered electrical heat, eliminating the need for cement fuels. UltraTech Cement will initially test the equipment in the drying of alternative fuel (AF) in its existing AF line.

UltraTech Cement managing director Kailash Jhanwar said “As a founding member of the Global Cement and Concrete Association (GCCA), we are committed to the sectoral aspiration of delivering net zero concrete by 2050. Towards this end, we are continuously striving to innovate at every stage of the whole life of concrete. Coolbrook’s RDH technology represents an exciting technological pathway that we believe has the potential to exponentially accelerate our progress towards full decarbonisation. Every megawatt of clean energy we add to our mix makes a big difference.”

Read more about Coolbrook’s RDH in the September 2022 issue of Global Cement Magazine

Coolbrook has been in the news recently with collaboration deals struck with Cemex and UltraTech Cement. First the Finland-based company officially launched its Roto Dynamic Heater (RDH) technology with a memorandum of understanding signed with Cemex in May 2022. Then, this week, it signed a similar agreement with UltraTech Cement.

The specifics of either agreement are unknown but the target is clearly to build an industrial pilot of an electric kiln – or something like it - at a cement plant. Coolbrook says it has run a pilot of its RDH technology in Finland. Further tests are now scheduled to continue for two years starting from September 2022 at the Brightlands Chemelot Campus at Geleen in the Netherlands. Commercial scale demonstrations are scheduled from 2022 with the hope of commercial use from 2024. Links with Cemex and UltraTech Cement seem to suggest progress. At the same time Coolbrook will be testing its RotoDynamic Reactor (RDR) technology, which promises to electrify the steam cracking process used in plastic manufacturing.

Publically available details on the RDH technology are light. In its promotional material Coolbrook says that it can achieve process temperatures of up to around 1700°C. This is crucial to achieve full clinker formation in a cement kiln. Reaching this temperature with non-combustion style kilns, such as solar reactors, has previously been a problem. Notably, Synhelion and Cemex said in February 2022 that they had managed to produce clinker using concentrated solar radiation. Retrofit possibilities and compact equipment size are also mentioned in the promotional material for the RDH. The former is an obvious attraction but size of equipment footprint is increasingly emerging as a potential issue for cement plants looking to reduce their CO₂ emissions. Rick Bohan from the Portland Cement Association (PCA) presented a summary of the potential and problems of emerging carbon capture and utilisation/storage (CCUS) technologies for cement plants in the US at the Virtual Global CemCCUS Seminar that took place on 14 June 2022. He noted that installing CCUS equipment makes cement plants start to look different (more like petrochemical plants in the view of Global Cement Weekly) and that they may require more space to install it all.

Coolbrook hasn’t been the only organisation looking at kiln electrification. The installation with the most available information on kiln electrification has been the Decarbonate project, led by the VTT, formerly known as the Technical Research Centre of Finland. The project has built a pilot rotary kiln with a length of 8m inside a shipping container. It has a production capacity of around 25kg/hr. The system reportedly uses fixed radiant heating coils around the kiln, surrounded by insulation materials. Early results presented to the 1st Virtual Global CemPower Seminar in late 2021 were that the kiln started up, sufficient calcination was occurring and the system was operated continuously for three days at a temperature of 1000°C with no problems reported. Further research was scheduled to carry on into 2022 with longer trials planned for three different materials.

HeidelbergCement’s subsidiary in Sweden, Cementa, completed a feasibility study on implementing electrified cement production at its Slite plant in 2019. It then said that it was conducting further study with electricity producer Vattenfall as part of CemZero project. This consists of three projects running to 2025. Namely: heat transfer with plasma in rotary kilns; direct separation of carbon dioxide from calcination of carbonate-based raw materials in the production of cement clinker and burnt lime; and carbon dioxide-free products with electrified production - reactivity of cement clinker with secondary additives. HeidelbergCement has since announced plans to build a full scale 1.8Mt/yr carbon capture and storage (CCS) plant at the Slite cement plant by 2030.

How this would fit with any kiln electrification plans is unknown. However, one attraction of moving to an electrical kiln, for all of the projects above, is to cut out the 40 – 50% of a cement plant’s CO₂ emissions that arise from the fuel that is burnt. Taking a kiln electric also makes CO₂ capture easier. Much of the remainder of the CO₂ released comes from the decomposition of limestone during calcination when clinker is created. Substitute out fossil or alternative fuels and the flue gas becomes much purer CO₂.

It is early days for cement kiln electrification but progress is happening both commercially and scientifically. The next step to watch out for will be the first pilot installation at a cement plant. One point to finish with is a comment that Rick Bohan made at the IEEE-IAS/PCA Cement Industry Technical Conference that took place in May 2022: carbon capture is expected to double a cement plant’s energy consumption. Kiln electrification is one potential route for cement production to reach net zero. CCUS is another. If one or both occur then a low carbon future could be a high energy one also.

Watch out for Global Cement’s forthcoming interview with Coolbrook in the September 2022 issue of Global Cement Magazine

For more on CCUS, download the proceedings pack for the Virtual Global CemCCUS Seminar 2022

For more on Synhelion and Cemex read the interview in the December 2020 issue of Global Cement Magazine interview

India: UltraTech Cement has entered into a collaboration with Finland-based Coolbrook to implement the latter’s roto dynamic heater (RDH) electric kiln technology in Indian cement plants. RDH technology uses renewable power to heat kilns to up to 1700°C.

UltraTech Cement managing director Kailash Jhanwar said “UltraTech is a forerunner in utilising renewable energy in its manufacturing operations. We are constantly looking at opportunities to improve process efficiency and reduce greenhouse gas emissions from our operations.” Jhanwar concluded “We believe that our collaboration with Coolbrook will help to further accelerate the decarbonisation of our operations.”

Coolbrook executive chair Ilpo Kuokkanen said “India is one of the most important potential markets for Coolbrook, as we want to make a global impact on CO₂ emission reductions. Cooperation with India’s largest cement producer UltraTech is a significant step in our strategy to decarbonise heavy industry processes globally. UltraTech is also an excellent addition to our comprehensive and responsive partnership ecosystem spanning across leading industrial actors, academic institutions, and the public sector.”