{"id":9064,"date":"2025-11-23T14:19:39","date_gmt":"2025-11-23T14:19:39","guid":{"rendered":"https:\/\/www.alcircle.com\/blog\/?p=7900"},"modified":"2025-11-23T14:19:39","modified_gmt":"2025-11-23T14:19:39","slug":"hydro-alunortes-electric-boilers-push-alumina-towards-low-carbon-steam-2","status":"publish","type":"post","link":"https:\/\/www.alcircle.com\/blog\/hydro-alunortes-electric-boilers-push-alumina-towards-low-carbon-steam-2","title":{"rendered":"Case Study: Hydro Alunorte\u2019s electric boilers push alumina towards low-carbon steam"},"content":{"rendered":"\n<p><a href=\"https:\/\/www.linkedin.com\/posts\/al-learn_al-pedia-activity-7272838911955996672-nlqt?utm_source=share&amp;utm_medium=member_desktop&amp;rcm=ACoAAC-UJa8BI7Q_bEWHHB5w7kiYpRYxoRxPc6w\"><mark style=\"background-color:#ffffff;color:#171390\" class=\"has-inline-color\">Decarbonisation<\/mark><\/a> at Hydro\u2019s Alunorte alumina refinery is no longer a future ambition; it is operating equipment. The world\u2019s largest single-site alumina refinery, located in northern Brazil, has commissioned two new electric boilers powered by renewable energy, replacing coal-fired units and marking a decisive shift away from fossil-based steam generation.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>The numbers that matter<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Two new electric boilers delivering around <strong>270 tonnes of steam per hour<\/strong><\/li>\n\n\n\n<li>Combined investment of <strong>NOK 580 million<\/strong> for the two newest boilers<\/li>\n\n\n\n<li>One earlier electric boiler installed in 2022 (three total now in operation)<\/li>\n\n\n\n<li>Long-term PPAs supplying renewable power from <strong>Mendubim solar plant <\/strong>and <strong>Ventos de S\u00e3o Zacarias wind farm<\/strong><\/li>\n\n\n\n<li>Expected annual <strong>CO\u2082 reduction<\/strong> up to <strong>550,000 tonnes<\/strong><\/li>\n\n\n\n<li>Separate fuel-switch project replacing fuel oil with natural gas <strong>NOK 2.4 billion<\/strong> investment (completed end-2024)<\/li>\n\n\n\n<li>Combined decarbonisation impact <strong>~35% CO\u2082 reduction<\/strong> vs 2017 baseline<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><a href=\"https:\/\/www.alcircle.com\/blog\/wp-content\/uploads\/2025\/11\/CASE-STUDY.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"641\" src=\"https:\/\/www.alcircle.com\/blog\/wp-content\/uploads\/2025\/11\/CASE-STUDY.jpg\" alt=\"\" class=\"wp-image-7901\" srcset=\"https:\/\/www.alcircle.com\/blog\/wp-content\/uploads\/2025\/11\/CASE-STUDY.jpg 1000w, https:\/\/www.alcircle.com\/blog\/wp-content\/uploads\/2025\/11\/CASE-STUDY-300x192.jpg 300w, https:\/\/www.alcircle.com\/blog\/wp-content\/uploads\/2025\/11\/CASE-STUDY-768x492.jpg 768w, https:\/\/www.alcircle.com\/blog\/wp-content\/uploads\/2025\/11\/CASE-STUDY-655x420.jpg 655w, https:\/\/www.alcircle.com\/blog\/wp-content\/uploads\/2025\/11\/CASE-STUDY-150x96.jpg 150w, https:\/\/www.alcircle.com\/blog\/wp-content\/uploads\/2025\/11\/CASE-STUDY-696x446.jpg 696w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/a><\/figure>\n<\/div>\n\n\n<p class=\"has-text-align-center has-small-font-size\"><em>Image source: hydro<\/em><\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Electrifying high-temperature steam<\/strong><\/h3>\n\n\n\n<p>The commissioning of these electric boilers proves that one of the alumina sector\u2019s toughest challenges, decarbonising high-temperature steam, is technically and commercially viable when paired with renewable energy and committed capex. With reliable PPAs behind the system, Alunorte is now producing low-carbon steam at an industrial scale, a benchmark few alumina refineries have reached.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Transforming Alunorte\u2019s energy matrix<\/strong><\/h3>\n\n\n\n<p>Beyond electrification, Hydro has restructured the refinery\u2019s entire thermal system. The NOK 2.4 billion fuel-switch project, completed at the end of 2024, eliminated fuel oil from the site\u2019s energy mix, replacing it with natural gas and further cutting carbon intensity. When both upgrades are combined, Alunorte\u2019s total emissions fall by roughly 35% relative to 2017, a shift that materially changes its position in the global alumina landscape.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Pushing toward Hydro\u2019s 2030 emissions ambition<\/strong><\/h3>\n\n\n\n<p>Hydro views these steps as foundational, not final. The company\u2019s target to slash operational emissions at Alunorte by up to 70% by 2030 places the refinery on one of the most ambitious decarbonisation trajectories in the industry. The upgrades also align the asset with Hydro\u2019s broader corporate climate commitments spanning its global aluminium value chain.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Why this matters for the aluminium industry<\/strong><\/h3>\n\n\n\n<p>For the wider value chain, Alunorte\u2019s move is more than a site-level achievement; it\u2019s proof of concept. The refinery demonstrates that high-temperature steam, long categorised as \u201chard-to-abate,\u201d can be electrified reliably when powered by large-scale renewables. As low-carbon alumina becomes a pricing and strategic differentiator, Alunorte\u2019s transformation will influence procurement decisions across primary aluminium, extrusion, rolling and downstream manufacturing.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Decarbonisation at Hydro\u2019s Alunorte alumina refinery is no longer a future ambition; it is operating equipment. The world\u2019s largest single-site alumina refinery, located in northern Brazil, has commissioned two new electric boilers powered by renewable energy, replacing coal-fired units and marking a decisive shift away from fossil-based steam generation. The numbers that matter Image source: [&hellip;]<\/p>\n","protected":false},"author":97,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[428,424,190,425,484,422,427,423,426],"class_list":{"0":"post-9064","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-blog-for-alumina-sector","7":"tag-alumina-co-reduction","8":"tag-alumina-decarbonisation","9":"tag-alumina-refining","10":"tag-aluminium-value-chain-emissions","11":"tag-case-study","12":"tag-electric-boilers","13":"tag-industrial-electrification","14":"tag-low-carbon-alumina","15":"tag-renewable-steam-generation"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Hydro Alunorte boosts alumina with electric, low-carbon steam<\/title>\n<meta name=\"description\" content=\"Hydro Alunorte installs new 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