Displaying items by tag: Solar power

Egypt: China’s Yingli Solar and Misr Asset Management (MAM) are planning to build a 100MW solar plant in order to sell electricity to Building Materials Industries Company (BMIC). Technical and economic studies have been completed for the US$80m plant but final approval is still awaited, according to Egypt Daily. The project will also receive US$50m in finance from the Asian Development Bank. BMIC operates a 1.5Mt/yr integrated cement plant at Assiut.

Cambodia: Chip Mong Insee Cement has commissioned a 9.8MW solar power system provided by Cleantech Solar. The system includes a 2.8MW floating solar power plant deployed on the plant’s reservoir and 7MW installed across multiple rooftops of the site. In addition, the deployment of the floating solar system will shield the reservoir from wind and the direct hot midday sun which is expected to reduce water loss through evaporation, contributing to Chip Mong Insee Cement’s water conservation efforts.

Cleantech Solar is a provider of renewable energy to companies in Southeast Asia and India. Based in Singapore, it owns and operates more than 120 solar power plants across the region, representing over 200MW of projects, with the majority in operation and the rest under construction and development.

India: Birla Corporation’s earnings before interest, taxation, depreciation and amortisation (EBITDA) rose due to increased sales of blended cement in the last quarter of 2018. Blended cements represented 89% of its total sales volumes compared to 85% in the same period in 2017.

The company’s net sales grew by 14.6% to US$653m in the nine months to the end of 2018 from US$569m in the same period in 2017. Its EBITDA rose by 17.1% to US$96.8m from US$82.7m. Its cement production increased by 10.5% to 9.86Mt from 8.92Mt and its cement sales increased by 9.9% to 9.79Mt from 8.92Mt. It said that better sales in key markets had offset raw material price rises such as petcoke, coal and diesel. It noted that the price of diesel had risen by over 20% in the reporting period although it had started to soften in the most recent quarter.

The cement producer held a ground breaking ceremony in late January 2019 for a new plant being built by its RCCPL subsidiary at Yavatmai district in Maharashtra. The 3.9Mt/yr unit has an investment of US$342m and it includes a 40MW captive power plant and a 10.6MW waste heat recovery (WHR) system. Commissioning is scheduled for the 2021 – 2022 financial year. The company is also planning to upgrade RCCPL’s plant at Kundanganj with 1.2Mt/yr of additional production capacity. Other new projects include a 12.25MW WHR system at Maihar that is expected to be commissioned in mid-2019. It is building solar power plants at Maihar, Chanderia and Satna with 11MW, 3.6MW and 1.2MW capacity respectively. Birla Corporation also said that restrictions on using explosives placed on limestone mining at Chanderia in Rajasthan had increased its costs.

Egypt: The Arabian Cement Company is to collaborate with the European Bank for Reconstruction and Development (EBRD) and Qatar National Bank (QNB) to build a solar power plant at its Suez cement plant. The banks are providing funding of over US$5m to support the project, according to the Daily News Egypt newspaper. The solar plant will be built in collaboration with Solarize Egypt. It is scheduled to start operation in the second quarter of 2019.

Spain: Cemex has signed a Euro117m deal with the local government to convert the land used by the Gádor cement plant in Almeria for use by new projects. These will include projects in solar and wind power generation, waste fuel production from plastics and biomass and a new concrete batching plant, according to Teleprensa. The initiative is intended to create around 400 jobs.

The cement producer has also signed a similar agreement for its Lloseta in Baleares. The company announced in mid-October 2018 that it was planning to close the two plants due to reduced demand for cement and mounting European CO₂ emissions regulations.

France: The SOLPART (Solar-Heated Reactors for Industrials Production of Reactive Particulates) project plans to test a pilot-scale version of its solar reactor from February 2019. The 50kW solar reactor will test a fluidised bed system at its PROMES (PROcédés, Materials and Solar Energy) testing site in Odeillo. The ultimate goal of the project is to test using a rotary kiln and a fluidised bed system to produce cement, lime, gypsum and other non-metallic products using only solar energy. The pilot scale reactor will test calcining limestone at a rate of 50kg/hr. Industrial partners involved with the project include Cemex.

India: UltraTech Cement has created a joint venture with Amplus Energy to expand its solar power generation capacity. The cement producer has acquired a 26% stake in the Amplus Sunshine, according to VCCircle Network. Amplus Sunshine will set up a 15MW captive solar plant at one of UltraTech’s Cement’s plants for an investment of around US$10m. The cement producer has a capacity of 50MW from its solar power plants but it intends to increase this. Amplus Energy installs rooftop solar power plants for the industrial and commercial sector.

There is lots to mull over for the cement industry from last week’s Global Slag Conference that took place in Prague.

One striking map from Michael Connolly, TMS International, showed the status of slag and steel products in the US. It was a multi-coloured patchwork of different regulatory statuses from approval to be used as a product to regulatory exclusion. This won’t come as a surprise to many readers but even within one country the way slag can be used legally varies.

As this column reported last year after the Euroslag Conference, the European Union can be presented in a similar way. The irony here is that increased use of slag and other secondary cementitious materials (SCM) is exactly the kind of change the cement and concrete industries need to make to decrease their carbon emissions. Constant quibbles over whether slag is a product or a waste undermine this. Happily then that Connolly was able to report progress in the US as lobbying by industry and the US National Slag Association have led to more states legally accepting slag as a product.

However, cement producers have other concerns in addition to environmental ones when it comes to slag usage as Doug Haynes from Smithers Apex explained. Haynes, a former UK steel industry worker turned consultant, spoke around a market report on the future of ferrous slag. His take on Basic Oxygen Furnace (BOF) slag was that despite fuel savings, decreased CO₂ emissions and the benefits of embodied iron when it is used as a raw material for clinker production, it is in the interests of cement producers for slag to be a waste because they then get it for free or at a reduced rate. It’s a similar story to the use of waste-derived fuels powering cement plant kilns where producers want lower fuel costs but waste collectors want value for their product. Unsurprisingly, Haynes wanted cement producers to accept the value embodied in BOF slag.

Charles Zeynel of ZAG International, an SCM trader, then laid out the situation where global SCM supplies are remaining static but cement demand is growing. Coal-fired power station closures are reducing supplies of fly ash, another SCM, placing pressure on existing granulated blast furnace slag (GBS) slag supplies. The message was very much in a slag trader’s favour but instructive nethertheless. If slag is in demand then the price will rise. Anecdotally, the increased number of cement producers at the conference seemed to indicate increased interest of the cement industry in the product.

Lots more speakers followed on topics such as slag beneficiation, grinding advances and new innovations. On grinding, one surprise that popped up was that Spain’s Cemengal has sold a Plug & Grind Vertical mill to CRH Tarmac’s cement plant at Dunbar in Scotland. It is the first such sale of this product in Europe. The last speaker, Jürgen Haunstetter of the German Aerospace Centre, stuck out particularly with his presentation on using slag as a thermal energy storage medium in a concentrated solar power (CSP) plant. This may not seem connected to the cement industry but it is along similar lines to Italcementi’s project at the Aït Baha cement plant in Morocco, which uses a CSP process that can be used with the plant’s waste heat recovery unit.

The Global Slag Conference will return in April 2019 in Aachen, Germany.

Read the full review of the 13th Global Slag Conference 2018

Just before the Christmas break one of the Global Cement editorial staff noticed how many solar projects have been popping up in the industry news of late. Looking at stories on the Global Cement website tagged with ‘solar’ five occurred in a six month period of 2017 out of a total of 13 since 2014. It’s not a rigorous study by any means but projects in the US, South Korea, India, Namibia and Jordan all suggest a trend.

All these new projects appear to be providing a supplementary energy source from photovoltaic (PV) solar plants that will be used to supply a portion of a cement plant’s electrical power requirements at a subsidised cost. Typically, these initiatives are preparing to supply 20 - 30% of a plant’s electricity over a couple of decades. These schemes are often supported by government subsidies to encourage decarbonised energy sources and a general trend in societies for so-called ‘greener’ energy sources in the wake of the Paris agreement on climate change.

Global Cement is familiar with this model of solar power in the cement industry from its use at the HeidelbergCement Hanson plant at Ketton in the UK. The project was realised by Armstrong Energy through local supplier Lark Energy and it provides around 13% of the cement plant’s electrical energy needs. Originally the array started off by supplying 10MW but this was later increased to 13MW in 2015. A key feature is that as part of the agreement with Armstrong Energy, Hanson receives 35% of the solar power generated for free and buys the remaining 65% at a fixed rate. Even at this rate the plant expects to save around Euro11m in energy costs over the lifetime of the solar array. In addition it will save 3500t/yr of CO2.

Most of the new solar projects announced in 2017 are of a similar scale and ambition to what Hanson Cement has done at Ketton. However, JSW Group’s plans are a magnitude larger. The Indian cement producer wants to build a 200MW solar plant next to its cement grinding plant at Salboni in West Bengal for US$124m. However, it has hedged its bets somewhat by saying that it might build a 36MW thermal power plant instead if its proposal fails.

LafargeHolcim and Italcementi have also experimented with concentrated solar power (CSP) plants for the cement industry. In 2007 LafargeHolcim and the Solar Technology Laboratory of the Paul Scherrer Institute and the Professorship of Renewable Energy Carriers at ETH Zurich started researching using high-temperature solar heat to upgrade low-grade carbonaceous feedstock to produce synthetic gas. The intention was to use the synthetic gas as a substitute for coal and petcoke in kilns.

Italcementi’s project at the Aït Baha plant in Morocco uses a CSP process that can be used with the plant’s waste heat recovery unit. Its moveable trough-style solar collectors follow the sun throughout the day to warm up a heat-transfer fluid during the day and store the heat in gravel beds overnight. In this way the CSP process allows for continuous operation over 24 hours. Before Italcementi’s acquisition by HeidelbergCement in 2016 the company had long-term ambitions to roll-out its CSP process across plants in the Middle East and North African region.

New battery technology of the kind backing the growing electric car industry may be further pushing the cement industry’s preference to PV over CSP power. The other renewable energy source slowly being built to support cement plants has been wind. Like PV it too suffers from cyclical disruptions to its power. Technological entrepreneur Elon Musk (of Tesla car fame) notably supplied the world's largest lithium-ion battery to Southern Australia to support one of its wind farms in late 2017. Around the same time local cement producer Adelaide Bighton announced in a separate deal that it had struck a deal to use wind power to part-power some of its facilities in the same region. At present it doesn’t look like solar power will be completely powering cement plants in the near future but perhaps a renewable fuels rate along similar lines to an alternative fuels rate might be a growing trend to watch.

The Global Cement CemPower conference on electrical power, including waste heat recovery, captive power, grinding optimisation and electrical energy efficiency, will return in January 2019.