Displaying items by tag: Golden Bay Cement

New Zealand: Golden Bay Cement has signed a deal with Genesis Energy for a supply of bottom ash from Huntly power plant for use in cement production at its Portland cement plant in Northland. Genesis Energy generates 20,000t/yr of bottom ash at the Huntly plant, situated in Waikato, 260km south of the Portland cement plant. The plant currently uses 15,000t/yr of fly ash from the Huntly power plant in its operations. The producer was previously investigating the use of volcanic ash in cement production in 2022. It currently uses waste tyres and wood waste as alternative fuels (AF) to produce its EcoSure low-carbon general-purpose cement.

Golden Bay Cement's general manager Gian Raffainer said "We are driven to decarbonise and achieve 30% less carbon by 2030. Contributing to waste reduction at a large scale for the benefit of all New Zealanders is incredibly exciting. It is a win-win for the environment and for Kiwis who want to use more environmentally friendly products."

New Zealand: Cement producer and construction firm Fletcher Building has reported a 20% year-on-year drop in domestic housing demand during the first quarter of 2023. The Australian newspaper has reported that the company attributed the decline to ‘soaring’ interest rates in the country. It now expects to sell 800 residential units in 2023, 20% below its previous expectation of 1000 units. Fletcher Building said that building materials costs rose by 5 – 10% between 2020 and 2022, due to ‘higher input and commodity costs’ in production.

CEO Ross Taylor said that Fletcher Building faces labour shortages in its civil construction business, but maintained a strong order pipeline. Taylor said “It won’t drive an uptick in volumes but it will underpin the volumes in the next three to four years.”

In Australia and New Zealand, four producers operate a total of six integrated cement plants, with another 13 grinding plants situated in Australia. This relatively small regional cement industry has been on a decades-long trajectory towards ever-greater sustainability – hastened by some notable developments in recent weeks.

Oceania is among the regions most exposed to the impacts of climate change. In Australia, which ranked 16th on the GermanWatch Global Climate Risk Index 2021, destructive changes are already playing out in diverse ways.¹ Boral reported 'significant disruption' to its operations in New South Wales and southeast Queensland due to wet weather earlier in 2022. This time, the operational impact was US$17.1m; in future, such events are expected to come more often and at a higher cost.

Both the Australian cement industry and the sole New Zealand cement producer, Golden Bay Cement, have strategies aimed at restricting climate change to below the 2° scenario. Golden Bay Cement, which reduced its total CO₂ emissions by 12% over the four-year period between its 2018 and 2022 financial years, aims to achieve a 30% reduction by 2030 from the same baseline. The Australian Cement Industry Federation (CIF)'s 2050 net zero cement and concrete production roadmap consists of the following pathways: alternative cements – 7%; green hydrogen and alternative fuels substitution – 6%; carbon capture – 33%; renewable energy, transport and construction innovations – 35% and alternative concretes – 13%, with the remaining 6% accounted for by the recarbonation of set concrete.

Australia produces 5.2Mt/yr of clinker, with specific CO₂ emissions of 791kg/t of clinker, 4% below the global average of 824kg/t.² Calcination generates 55% of cement’s CO₂ emissions in the country, and fuel combustion 26%. Of the remainder, electricity (comprising 21% renewables) accounted for 12%, and distribution 7%. Australian cement production has a clinker factor of 84%, which the industry aims to reduce to 70% by 2030 and 60% by 2050. In New Zealand, Golden Bay Cement's main cement, EverSure general-purpose cement, generates CO₂ at 732kg/t of product.³ It has a clinker factor of 91%, and also contains 4% gypsum and 5% added limestone.

Alternative raw materials

Currently, Australian cement grinding mills process 3.3Mt/yr of fly ash and ground granulated blast furnace slag (GGBFS). In Southern Australia, Hallett Group plans to commission its upcoming US$13.4m Port Augusta slag cement grinding plant in 2023. The plant will use local GGBFS from refineries in nearby Port Pirie and Whyalla, and fly ash from the site of the former Port Augusta power plant, as well as being 100% renewably powered. Upon commissioning, the facility will eliminate regional CO₂ emissions of 300,000t/yr, subsequently rising to 1Mt/yr following planned expansions. Elsewhere, an Australian importer holds an exclusive licencing agreement for UK-based Innovative Ash Solutions' novel air pollution control residue (APCR)-based supplementary cementitious material, an alternative to pulverised fly ash (PFA), while Australian Graphene producer First Graphene is involved in a UK project to develop reduced-CO₂ graphene-enhanced cement.

Golden Bay Cement is investigating the introduction of New Zealand's abundant volcanic ash in its cement production.

Fuels and more

Alternative fuel (AF) substitution in Australian cement production surpassed 18% in 2020, and is set to rise to 30% by 2030 and 50% by 2050, or 60% including 10% green hydrogen. In its recent report on Australian cement industry decarbonisation, the German Cement Works Association (VDZ) noted the difficulty that Australia's cement plants face in competing against landfill sites for waste streams. It described current policy as inadequate to incentivise AF use.

Cement producer Adbri is among eight members of an all-Australian consortium currently building a green hydrogen plant at AGL Energy’s Torrens Island gas-fired power plant in South Australia.

Across the Tasman Sea, Golden Bay Cement expects to attain a 60% AF substitution rate through on-going developments in its use of waste tyres and construction wood waste at its Portland cement plant in Northland. The producer will launch its new EcoSure reduced-CO₂ (699kg/t) general-purpose cement in November 2022. In developing EcoSure cement, it co-processed 80,000t of waste, including 3m waste tyres. The company says that this has helped in its efforts to manage its costs amid high coal prices.

Carbon capture

As the largest single contributor in Australia's cement decarbonisation pathway, carbon capture is now beginning to realise its potential. Boral and carbon capture specialist Calix are due to complete a feasibility study for a commercial-scale carbon capture pilot at the Berrima, New South Wales, cement plant in June 2023.

At Cement Australia's Gladstone, Queensland, cement plant, carbon capture is set to combine with green hydrocarbon production in a US$150m circular carbon methanol production facility supplied by Mitsubishi Gas Chemical Company. From its commissioning in mid-2028, the installation will use the Gladstone plant's captured CO₂ emissions and locally sourced green hydrogen to produce 100,000t/yr of methanol.

More Australian cement plant carbon capture installations may be in the offing. Heidelberg Materials, joint parent company of Cement Australia, obtained an indefinite global licence to Calix's LEILAC technology on 28 October 2022. The Germany-based group said that the method offers effective capture with minimal operational impact.

Cement Australia said “The Gladstone region is the ideal location for growing a diverse green hydrogen sector, with abundant renewable energy sources, existing infrastructure, including port facilities, and a highly skilled workforce." It added "The green hydrogen economy is a priority for the Queensland government under the Queensland Hydrogen Industry Strategy.”

Logistics

Australian and New Zealand cement facilities' remoteness makes logistics an important area of CO₂ emissions reduction. In Australia, cement production uses a 60:40 mix of Australian and imported clinker, while imported cement accounts for 5 – 10% of local cement sales of 11.7Mt/yr.

Fremantle Ports recently broke ground on construction of its US$35.1m Kwinana, Western Australia, clinker terminal. It will supply clinker to grinding plants in the state from its commissioning in 2024. Besides increasing the speed and safety of cement production, the state government said that the facility presents 'very significant environmental benefits.'

Conclusion

Antipodean cement production is undergoing a sustainability transformation, characterised by international collaboration and alliances across industries. The current structure of industrial and energy policy makes it an uphill journey, but for Australia and New Zealand's innovating cement industries, clear goals are in sight and ever nearer within reach.

References

1. Eckstein, Künzel and Schäfer, 'Global Climate Risk Index 2021,' 25 January 2021, https://www.germanwatch.org/en/19777

2. VDZ, 'Decarbonisation Pathways for the Australian Cement and Concrete Sector,' November 2021, https://cement.org.au/wp-content/uploads/2021/11/Full_Report_Decarbonisation_Pathways_web_single_page.pdf

3. Golden Bay Cement, 'Environmental Product Declaration,' 12 May 2019, https://www.goldenbay.co.nz/assets/Uploads/d310c4f72a/GoldenBayCement_EPD_2019_HighRes.pdf

New Zealand: Fletcher Building subsidiary Golden Bay Cement has co-processed 80,000t of waste in production of its EcoSure reduced-CO₂ general-purpose cement at its Golden Bay, Whangarei, cement plant. The plant has achieved a coal substitution rate of 50%. It has processed various waste streams, including 3 million used tyres. EcoSure cement generates CO₂ emissions of 699kg/t of product, 20% less than its imported alternatives, according to Golden Bay Cement. Fletcher building CEO Nick Traber said that this figure is 'simply our starting point.' The company's next target is to achieve a 30% CO₂ reduction by 2030.

Traber said "We needed to think outside the box, or rather the cement bag to be more precise. The challenge was around what enhancements we could make to our manufacturing processes at our Golden Bay cement works in order to improve the plant's sustainability. We quickly realised that consuming used tyres and wood waste as alternative fuels was a win-win. When we started with the idea in 2015, we were aiming to replace 15% of coal with end-of-life tyres. Fast forward to 2022, and our rate of coal substitution is now at 50%, which has obviously delivered further reductions in carbon emissions, as well as helping to offset increased coal costs."

New Zealand: Fletcher Building Materials recorded consolidated sales of US$5.37bn during its 2022 financial year, up by 4.7% year-on-year from US$5.13bn in the previous year. Its net earnings also rose by 42%, to US$273m from US$193m.

The group's concrete division, which includes Golden Bay Cement, contributed US$556m-worth (9%) of group sales. The figure represents an 8% increase from 2021 financial year levels. The business recorded 'strong performances' across all key product segments, underpinned by 'robust' demand and pricing. It made capital expenditure investments of US$51.1m, including in a waste tyre recycling system upgrade at the Golden Bay cement plant. The latter increased the plant's alternative fuel (AF) substitution to 50% from 35%. The company also continued to focus on developing low-CO₂ concrete binders.

Fletcher Building Materials chief executive officer Ross Taylor said "The 2022 financial year has not been without its challenges. Global and national supply chain disruptions have continued into the third year of the Covid-19 pandemic." He added "The New Zealand Commerce Commission recently published its interim market study report into residential building supplies. The final report and recommendations will be published in December 2022 and in the meantime we will continue to work collaboratively with both the commission and the government."

New Zealand: Golden Bay Cement says that proposed changes to New Zealand's emissions trading scheme (ETS) would force it to review the viability of cement production at its 0.9Mt/yr Portland cement plant in Whangārei, Northland. The Northern Advocate newspaper has reported that the government proposes to reduce the number of ETS credits available to industrial enterprises under free allocation from 2024.Since the scheme's introduction in 2008, highly emissions-intensive businesses such as Golden Bay Cement have enjoyed 90% free allocation of ETS credits for their emissions.

New Zealand: Golden Bay is spending US$6m on an upgrade to its Wellington cement terminal. The project will increased storage capacity, reconfigure the site for better traffic management, add new office facilities and upgrade ship discharge lines to reduce load times. Greater automation is also intended, as well as new branding for the site.

Nick Traber, Fletcher Building’s chief executive for concrete said, “Our Golden Bay Terminal has served Wellington well for many decades and has contributed to some of the region’s biggest infrastructure projects along with countless houses, driveways and other developments. The upgrade is a key part of our strategy to remove bottlenecks in our operations to drive growth and reduce costs, as well as increase the resilience of our supply chain using all modes of transport. It’s a demonstration of our commitment to local manufacturing as New Zealand's only and lowest carbon cement producer.”

New Zealand: Golden Bay Cement has obtained two hydrogen-fuelled cement trucks produced by Hyzon. TR Group leased the vehicles to the cement company.

Golden Bay Cement said “These two zero emission green trucks signal the future, and are just another step we take to a smaller carbon footprint across our business.”

New Zealand: Golden Bay Cement has announced that the second annual Girls in Infrastructure day will take place on 30 March 2021 at its cement plant. The event aims to encourage female secondary school pupils in Northland to consider a career in the infrastructure industry. The company said that attendees will see the day-day-to-day operations of the cement plant, as well as learning about other job opportunities along the supply line of infrastructure building.

Process engineering manager Kelly Stevens said, “Having the event on site at Golden Bay, the students are able to get up close to our operations, as well as talk to our staff directly.”

New Zealand: Fletcher Building says that its Golden Bay Cement plant in Auckland was forced stop its cement mill for four weeks in September 2018. It said it had insurance to cover this but that its earnings for its 2019 financial year are likely to be impacted by up to US$8m. Generally, the building materials producer reported that, until the end of October 2018, its business in New Zealand had been flat. In Australia it is facing ‘challenging’ conditions with growing input prices and a slowing residential sector.