Displaying items by tag: Waste Heat Recovery

Germany: Schwenk Zement will utilise Germany-based Orcan Energy's organic rankine cycle (ORC) technology at its Allmendingen cement plant in Baden-Württemberg. The installation of five ORC modules aims to harness residual heat from the clinker cooling process to generate electricity, saving 8.5GWh/yr. Orcan Energy expects operations to begin in the first quarter of 2025. The company has previously worked with Dyckherhoff and Cemex.

Energy has been the theme for a couple of cement news stories of note from Egypt this week. The first concerns the government’s impending plan to centralise distribution of mazut (heavy fuel oil) to cement plants to help them cope with ongoing power shortages. Earlier in the week Cemex signed a deal with the Assiut Governorate to operate a second municipal solid refuse processing unit in the country. The company’s first Regenera facility, in Mahala, started operations in May 2024. Another story from mid-September 2024, along the same theme, covered the inauguration of an 18MW waste heat recovery (WHR) unit at Heidelberg Materials Egypt's Helwan Cement plant.

The wider story is that the country has faced so-called load shedding, or power rationing, since mid-2023 due to falling gas production, rising energy demand and negative currency exchange effects making it harder to buy fuel imports. The power cuts were extended in duration in July 2024 due to a heat wave. The government then said in late September 2024 that it is making investments to prevent domestic power cuts in 2025.

The cement stories mentioned above show some of the ways cement companies cut their energy costs. Two potential ways of doing this are to increase the use of alternative fuels (AF), such as municipal solid waste, or to install a WHR unit. Titan Cement, for example, reported AF thermal substitution rates of above 40% in Alexandria and above 30% in Beni Suef in the first half of 2024. The local press hasn’t reported power shortages amongst the country’s cement producers, but the plans to control the distribution of mazut suggest that either ‘something’ has happened or the government is trying to avoid ‘something.’ Readers may recall that producers have periodically faced step changes in power supplies over the years. In the mid-2010s, for example, lots of plants switched from heavy fuel oil and gas to coal. The energy price fluctuations following the start of the Russia - Ukraine war in 2022 then saw the price of coal rise.

However, what the foreign-owned producers have complained about in the first half of 2024 is the declining exchange rate of the Egyptian Pound. Cementir, Cemex and Titan Cement all noted this. However, Titan reckoned that International Monetary Fund and European Union investment had actually eased the economic situation in the first half of the year leading to an increase in the number of large construction projects.

One effect of the currency problems upon the cement market has been a focus on exports. At the start of September 2024 the Federation of Egyptian Industries said that national cement consumption in 2024 was expected to drop by 4% year-on-year to 45Mt. However, exports were projected to rise to 15Mt. The first and second most popular destinations so far in 2024 have been the Ivory Coast and Ghana. Yet, exports to Libya, the third biggest external market, may have had the biggest effect. These have been blamed for creating a shortage of trucks that was causing delays to the local construction sector. The round-journey from Egypt to Libya can take up to 12 days. This has left building sites bereft of raw material deliveries because all the trucks are elsewhere! Vicat acknowledged the growing importance of imports for its business in Egypt in its half-year report for 2024. It said that ‘sluggish’ domestic market conditions “were more than offset by growth in cement and clinker volumes for export to the Mediterranean and Africa regions.”

The wider picture of the cement sector in Egypt remains one of overcapacity with integrated capacity estimated above 70Mt/yr. The government introduced cement production quotas in mid-2021 and this stabilised prices (and profits). The recent state of the local economy may have strained this, but the latest round of external investment appears to have buoyed things for now. Although the effects of the Israeli military action in Lebanon may have unforeseen consequences upon neighbouring markets. In the meantime, cutting energy costs and growing exports offer two ways for producers to raise their profits.

Saudi Arabia: Turboden, a subsidiary of Mitsubishi Heavy Industries, has announced its first project in Saudi Arabia — a 13MW organic rankine cycle (ORC) power plant at Riyadh Cement Company. This marks the first ORC plant in the Kingdom and the largest globally.

The plant will capture residual heat from the cement plant's clinker coolers and pre-heaters (2 kilns of 5000t/day each), offering high energy efficiency and eliminating water consumption. Sinoma Energy Conservation serves as the project's engineering, procurement and construction contractor.

General manager Andrea La Gioia said "Turboden is honoured to spearhead this groundbreaking project in collaboration with Riyadh Cement Company. With around 460 ORC plants in 52 countries, 50 in ‘waste’ heat recovery application, our ORC technology represents a game-changer in the global energy landscape, and we are proud to support the Kingdom of Saudi Arabia in its transition towards cleaner, more sustainable energy sources."

Egypt: A new waste heat recovery system has been inaugurated at Heidelberg Materials Egypt's Helwan Cement plant. The US$30m system is expected to produce 18MW of energy, equating to a saving of 40,000t/yr of CO₂ emissions.

Kenya: Mombasa Cement will build a 20MW power plant at its Vipingo plant in Kilifi County, to help reduce energy costs. The US$19.4m project will generate 10MW of electricity using a waste heat recovery system and 10MW from solid fuels. The waste heat will be recovered from flue gases emitted during cement production. The plant has two clinker production lines. The power generated will be used onsite to support cement production.

Italy: NovaAlgoma, a joint venture between the Italian-Swiss Nova Marine Carriers and Canada's Algoma Central Corporation, has announced the construction of the ‘world’s largest and greenest’ cement carrier, weighing 38,000t. This vessel will be built by Xinle Shipbuilding in China and delivered by the end of 2026. It will reportedly be the first to use both traditional fuel and methanol and can connect to electrical grids in ports to eliminate emissions, according to local news reports. Additionally, it will feature a waste heat recovery system that converts exhaust gases into 250kW of electrical energy.

Vincenzo Romeo, CEO of Nova Marine, said "This new construction, which meets the forecasts for the development of our fleet and the growth of cement market demand in the coming years, is intended to consolidate our positioning among the global leaders in cement transportation.”

Adani Group’s subsidiary Ambuja Cements signed a deal this week to buy Penna Cement for US$1.25bn. The agreement adds 14Mt/yr of cement production capacity to the group with a focus in the south of India. The acquisition is a big step towards the group’s target of reaching a capacity of 140Mt/yr by 2028. Ajay Kapur, the head of Ambuja Cements, also singled out the advantage the company hopes to gain from taking control of Penna Cement’s terminals saying that they would “prove to be a gamechanger by giving access to the eastern and southern parts of peninsular India.” The move is expected to increase the group’s market share in India by 2%, and by 8% in South India.

Penna Cement operates four integrated plants in Andhra Pradesh and Telangana with a capacity of 7Mt/yr. Two of these units also include waste heat recovery installations and one has a captive power plant. It runs two grinding plants in Andhra Pradesh and Maharashtra with a capacity of 3Mt/yr. Another integrated plant is being built at Jodhpur in Rajasthan and a grinding plant at Krishnapatnam in Andhra Pradesh. Finally, the company owns four bulk cement terminals at Kolkata, Gopalpur, Karaikal and Kochi in India, one at Colombo in Sri Lanka and it also owns a 25,000t cement carrier.

Adani Group’s march towards that target of 140Mt/yr by 2028 started off in mid-2022 when it purchased Ambuja Cements and ACC from Holcim. This gave it a starting capacity of 68Mt/yr in the cement sector. Various smaller additions followed including new plants at Ametha and Dahej and the acquisitions of Asian Cement and Concrete, MyHome Industries and Sanghi Industries. The latter company was the biggest of these purchases. Once the in-progress projects from Penna Cement are built, Adani Group should have a capacity of 93Mt/yr. Another 20Mt/yr is reportedly at various stages of execution. The remaining 27Mt/yr is described as being ‘blueprint ready.’

Generally, the local financial press has been in favour of the transaction agreeing with the geographic advantages of Adani Group increasing its presence in the southern states. The benefits of the high number of railway sidings at Penna Cement’s plants were also commented upon as a means for Ambuja Cements to reduce its costs per tonne of cement. The logistics benefit from the port terminals is also expected by Adani Group’s chief financial officer to reduce the group’s logistics costs with an impact expected within the next year. However, it has been reported that Penna Cement’s operating performance had been weaker in the last financial year due to low sales volumes, poor operational efficiency and high coal costs. A takeover by Adani Group could certainly fix the latter two issues. Yet, it has also been reported that competition in the cement markets in Andhra Pradesh and Telangana is up, due to a mismatch between supply and demand. So, improving Penna Cement’s capacity utilisation in these regions might be harder to solve than simply being absorbed into Adani Group.

India’s two largest cement producers both have plans in motion to mount up production capacity by the end of the decade in what has been dubbed ‘the battle of the billionaires.’ The market leader is UltraTech Cement and it has shown reluctance to cede ground to the cement newcomer Adani Group. The former company’s current target is to make it to just under 190Mt/yr by 2027. It said it had a capacity of 152Mt/yr in May 2024. It is ahead of Adani Group by this measure but there is still plenty of scope for surprises. Given the rivalry between the companies there is a regular stream of speculation about which of the smaller cement producers they might be about to buy at any given time. For example, in October 2023 HeidelbergCement India was rumoured to be courting offers from UltraTech Cement, Adani Group and JSW Cement. Last week, Adani Group was reportedly interested in buying either Saurashtra Cement, the cement business of Jaiprakash Associates, Vadraj Cement or… Penna Cement. Occasionally the rumours are true after all. UltraTech Cement remains in first place for now but the situation may change.

Germany: Rohrdorfer has started operation of a new photovoltaic (PV) unit at its Rohrdorf cement plant near Rosenheim in Upper Bavaria. The rooftop PV installation comprises 1000 modules, covers around 2000m2 and has a peak output of 400kW. The construction time of the solar panels took five weeks. Modules supplied by Hecker Solar were installed by Elektro Ecker.

The cement plant has produced around one third of its electricity requirements via a waste heat recovery unit since 2011. Rohrdorf Group aims to generate 30% of its electricity from renewable sources as a whole by 2033.

India: Adani Cement is upgrading its facility in Himachal Pradesh by installing a new 7800t/day double-stage cooler grate. This upgrade aims to increase efficiency, lower power consumption and clinker temperature and enhance waste heat recovery system performance, according to the company. The project involves replacing the first and second grates of the existing IKN pendulum cooler.

Belgium: Holcim kicked-off its Go4Zero project at its Obourg plant on 16 May 2024 in an event attended by the Belgian Prime Minister Alexander De Croo and the European Commissioner for Climate Action Wopke Hoekstra. The €500m Go4Zero project, supported with €230m of funding from the European Union, will enable the integrated plant to reduce its CO₂ emissions by 30% by 2027 and to produce 2Mt/yr of CO2-free cement by 2029. When fully operational, the Obourg plant will capture 1.2Mt/yr of CO₂.

The Go4Zero project incorporates a number of approaches to achieve net-zero CO₂ cement. The centrepiece is an oxy-fuel combustion process to generate an easy-to-handle exhaust gas with up to 80% CO₂. This will be coupled to a cryogenic purification unit to generate a >99%-pure CO₂ stream .The project will also make use of waste heat recovery (WHR), new exhaust filtration equipment and Europe’s largest floating solar panel farm.