Displaying items by tag: drones

India: Operators of limestone mines in Karnataka's Chamarajanagar District have suspended quarry operations indefinitely in protest against the Karnataka state government's increased licensing royalties and rules requiring drone surveillance. The companies also demand that the state government cease to implement new policies affecting them. The Times of India newspaper has reported that the strike has impacted a total of 10,000 jobs, both at quarries and downstream in the building materials and construction sectors.

Philippines: Holcim Philippines carried out 70 upgrades aimed at increasing automation in its operations during 2022. The projects aim to optimise cement production, generate cost savings and ensure best safety practices. The Manila Times has reported that new Industry 4.0 initiatives include equipment monitoring systems offering 90-day performance projections, software capable of predicting cement's strength development and drones to replace visual inspections in remote spaces.

Holcim Philippines said that it is currently exploring the use of new predictive technologies in its operations.

Holcim Schweiz hit a milestone recently with the aerial drone programme at its Siggenthal cement plant. The project with Voliro, a Switzerland-based technology start-up, has started to use multi-rotor drones to conduct official measurement flights. They used them to take measurements to determine the steel wall thicknesses of the cement kiln and the cyclone preheater. The work has been part of Holcim’s ‘Plants of Tomorrow’ industrial automation plan with unmanned aerial vehicles (UAV). Key features of the particular drones being used are that they can be rotated around all axes by a special rotor system and can even fly upside down.

Holcim has been using drones in and around cement plants for a few years now. When it launched the Plants of Tomorrow plan in 2019, Switzerland-based drone supplier Flyability said that the cement company had chosen its Elios 2 model to perform confined space inspection. Earlier in 2017 another supplier, SenseFly, said that LafargeHolcim Tanzania had been using its fixed-wing products. Holcim is also far from alone in its use of drones. A few examples among many include Cemex USA’s work with Kespry earlier in 2021, HeidelbergCement’s work in North America and Germany in 2020 and 2021 and Votorantim’s testing at its Córdoba and Niebla plants in Spain back in late 2015. 

UAV usage by armed forces dates back to examples like unmanned incendiary balloons being deployed in the 19^th century to Azerbaijan’s reported decisive use of drones in its war against Armenia in late 2020. The current era of industrial UAVs began after 2000 when governments starting issuing civilian permits, miniaturisation occurred and improvements in cameras, sensors and computing power followed. For the mineral processing sector the trend started with drones being used for stockpile management and quarry surveying. At present this is the main area that UAVs are used for by the sector, often coupled with photogrammetry techniques. CalPortland’s Adam Chapman’s paper at the 2021 IEEE-IAS/PCA Virtual Cement Conference described one company’s use of UAVs in the cement industry since 2016, looking at licensing, cost, quality of data, drone technology, fleet management and field experiences.

More recently though, tests of drones used to survey cement plant buildings and structures have started being publicised such as Holcim’s work at Siggenthal. A presentation by consultant John Kline and Chris Place of Exelon Clearsight summarised the use of drones for structural inspection at cement plants at the Global CemProducer 3 webinar in January 2021. The key benefits they promoted of using an UAV in this way were: improved safety because workers have reduced risk from climbing, working at height or in confined spaces; less time to conduct a survey; higher resolution photographs and video; better coverage through grid method surveying; and an overall lower cost. However, on that last point, other commentators have noted that market-leading drones for surveying are relatively expensive and easy to damage. Drones have since been used to start going inside structures at cement plants with Kline demonstrating their use to inspect the condition of refractory within the cooler, kiln, pre-heater and cyclone of a production line at the Global CemProducer 2 webinar in July 2020. HeidelbergCement has also been doing similar things, with an inspection trial using a drone of the kiln at the Schelklingen plant in Germany during the 2021 maintenance shutdown period at the site.

So far the use of drones by the cement industry has mostly been in a surveying or inspection capacity. Given the short time that UAVs have been used like this there is likely to be scope for lots more development both within existing fields and new ones as the sector works out how best the technology can be used. One application we couldn’t find in the research for this short article was the use of drones for security and surveillance tasks at cement plants and quarries although this may be happening already. However, there could be a more active role for drones if or when a company finds a way for them to start making basic repairs or carrying out simple maintenance in those hard to reach areas that drones excel at accessing. Research examples exist of UAVs being used to spray concrete or repair materials onto minor defects in concrete structures. Yet considerable challenges face these kinds of applications such as the weight of a loaded multi-rotor drone or damage from rebound. Before we all get too worried about drones replacing our jobs though it is worth considering that Amazon’s plan to deliver packages by UAV was first announced in 2013 and it still hasn’t happened yet. It may yet, but for now in most situations humans remain cheaper and more practical than robots or drones.

Switzerland: Holcim Schweiz and Voliro have conducted the first official measurement drone flights at the Siggenthal integrated cement plant. The drone used took measurements to determine the steel wall thicknesses of the cement kiln and the cyclone preheater.

The companies have been testing using aerial drones to conduct inspection and maintenance work as part of Holcim’s ‘Plants of Tomorrow’ initiative. The drones developed by ETH Zürich spin-off company Voliro can be rotated around all axes by a special rotor system and can fly upside down. They are being tested in areas that are difficult for human employees to reach, such as the steel walls and casings of production facilities and silos.

Voliro was founded in 2019 and it is developing a new generation of flying drones for the inspection and maintenance of industrial plants. The drones can be equipped with a variety of sensors that perform visual, thermal and contact-based measurements. The drone's 360° design allows sensors to take measurements even on curved and inclined surfaces. This potentially allows hard-to-reach areas in a cement plant to be assessed without shutting down production. Holcim has been supporting Voliro's product development since 2019 and is providing the technology start-up with the infrastructure in Siggenthal for test flights. The building materials producer has also been supporting the project with its own knowledge about non-destructive testing.

US: Kespry says that Cemex USA is using its drone and software product for stockpile management at its operations. A Cemex representative said that it has mapped 74,500ha of land over more than 4000 drone missions using Kespry’s product. The supplier uses autonomous aerial drones to gather survey data and then uses machine learning techniques to analyse the results.

Director of aggregate resources Matt Lewis said, “Kespry plays a critical role at both our cement and aggregates sites, despite operations being significantly different. Since initially adopting Kespry, we have been able to measure 21,100 stockpiles across our aggregates sites, while also collecting massive amounts of topographic data into the Kespry Cloud across our cement sites. The amount of time and money the Kespry platform has saved us is unmatched, and we wouldn’t be able to operate at this level if it weren’t for Kespry.”

US: The North Dakota Department of Transportation (NDDOT) has signed a contract with drone supplier Botlink InSite to serve its drone surveying and mapping needs for management of aggregates used in building transport infrastructure.

Chief executive officer (CEO) Terri Zimmerman said, “We’re excited to add the NDDOT to our ever-growing list of customers. Our users see real cost savings by quickly getting accurate data, including reducing overproduction and underproduction.” She added that the drones can also serve cement companies in managing their raw materials stores.

Hydrogen and its use in cement production has been adding a dash of colour to the industry news in recent weeks. Last week, Lafarge Zementwerke, OMV, Verbund and Borealis signed a memorandum of understanding (MOU) to plan and build a full-scale unit at a cement plant in Austria to capture CO₂ and process it with hydrogen into synthetic fuels, plastics or other chemicals. This week, Air Products and ThyssenKrupp Uhde Chlorine Engineers (TUCE) signed a strategic agreement to work together in ‘key regions’ to develop projects supplying green hydrogen. Both of these developments follow the awarding of UK government funding in February 2020 to support a pilot project into studying a mix of hydrogen and biomass fuels at Hanson Cement’s Ribblesdale integrated plant.

As the title of this column suggests there is an environmental colour code to describe how hydrogen is made for industrial use. This is a bit more codified than when grey cement gets called ‘green’ but it pays to remember what the energy source is. So-called ‘green’ hydrogen is produced by the electrolysis of water using renewable energy sources such as hydroelectric or solar, ‘Grey’ hydrogen is made from steam reforming using fossil fuels and ‘Blue’ hydrogen is similar to grey but has the CO₂ emissions from the fuels captured and stored/utilised. Price is seen as the main obstacle to wider uptake of hydrogen usage as a fuel in industry although this is changing as CO₂ pricing mounts in some jurisdictions and the connected supply chain is developed. A study by BloombergNEF from March 2020 forecasted that green hydrogen prices could become cheaper than natural gas by 2050 in Brazil, China, India, Germany and Scandinavia but it conceded that many barriers would have to be overcome to get there. For example, hydrogen has to be manufactured making it more expensive than fossil fuels without government policy support and its, “lower energy density also makes it more expensive to handle.”

The three recent examples with respect to the cement industry are interesting because they are all exploring different directions. The Lafarge partnership in Austria wants to use hydrogen to aid the utilisation side of its carbon capture at a cement plant. The industrial suppliers, meanwhile, are positioning themselves in the equipment space for the technology required to use hydrogen on industrial plants. Secondly, ThyssenKrupp has alkaline water electrolysis technology that it says it has used at over 600 projects and electrochemical plants worldwide. Air Products works with industrial gas production, storage and handling.

Finally, the Hanson project in the UK will actually look at using hydrogen as a partial replacement for natural gas in the kiln combustion system. A Cembureau position paper in mid-2019 identified that the challenges to explore in using hydrogen in cement production included seeing how its use might affect the physical aspects of the kiln system, the fuel mass flows, temperature profile, heat transfer and the safety considerations for the plant. Later that year a feasibility study by the Mineral Products Association (MPA), Verein Deutscher Zementwerke (VDZ) and Cinar for the UK government department that is funding the Hanson project concluded that a hydrogen flame’s high heat in a burner alone might not make it suitable for clinker formation. However, the study did think that it could be used with biomass to address some of that alternative fuel’s “calorific limitations” at high levels. Hence the demonstration of a mixture of both hydrogen and biomass.

That’s all on hydrogen but, finally, if you didn’t log into yesterday’s Virtual Global CemProducer 2 Conference you missed a treat. One highlight was consultant John Kline’s presentation on using drones to inspect refractory in some hard to reach places. Flying a camera straight into a (cool) pyro-processing line was reminiscent of a science fiction film! Global Cement has encountered the deployment of unmanned aerial vehicles in quarry and stockpile surveys previously but this was a step beyond.

The proceedings pack - including video, presenter slides and delegate list - for the Virtual Global CemProducer 2 Conference 2020 is available to buy now

Switzerland: LafargeHolcim has launched a four-year industrial automation plan called ‘Plants of Tomorrow.’ It includes Industry 4.0 concepts such as automation technologies and robotics, artificial intelligence, predictive maintenance and digital twin technologies for its entire production process. The plan is expected to show 15 – 20% operational efficiency gains. It also claims that the initiative is, “one of the largest roll-outs of Industry 4.0 technologies in the building materials industry.”

“Transforming the way we produce cement is one of the focus areas of our digitalisation strategy and the ‘Plants of Tomorrow’ initiative will turn Industry 4.0 into reality at our plants. These innovative solutions make cement production safer, more efficient and environmentally fit,” said Solomon Baumgartner Aviles, Global Head Cement Manufacturing.

The building materials company is presently working on more than 30 pilot projects covering all regions where the company is active. The company’s integrated cement plant at Siggenthal in Switzerland will be a trial site where the integration of all relevant modules will be tested.

One examples of where LafargeHolcim has started the plan include a partnership with Swiss start-up Flyability to use drones to increase the frequency of inspections at plants while simultaneously reducing cost and increasing safety for employees by inspecting confined spaces. The concept is being rolled out to several markets, including Switzerland, France, Germany, the UK, the US, Canada, India and Russia. It is also using a subsidiary, Maqer, to identify technology startups with promising technology. It aims to harness the potential of this through new partnership models with both manufacturing and software companies.

LafargeHolcim has already launched technology to track performance centrally and allocated resources to support the plant network in real time. More than 80% of LafargeHolcim’s cement plants are already connected to its Technical Information System that provides data transparency at plant, country, regional and global level. Some country operations have more than a decade of historic technical data available. Other systems allow the remote control of certain parts of the operations through online condition monitoring systems. Since its implementation in 2006, this system has saved over Euro70m and an additional 3Mt of cement sold through fewer breakdowns.