Displaying items by tag: A TEC
A TEC to install ReduChlor chlorine bypass system at Holcim Schweiz’s Eclépens cement plant
13 January 2022Switzerland: A TEC has secured a contract to install a new ReduChlor chlorine bypass system at Holcim Schweiz’s Eclépens cement plant in Vaud. The supplier says that it will also fit a bypass dust handling system and upgrade the alternative fuel (AF) feeding system at the plant.
South Korea: A TEC says that it has installed and commissioned a ReduDust dust treatment plantin the chlorine bypass system of Ssangyong Cement’s Donghae cement plant in Gangwon. The ReduDust plant will recover salts from dust, enabling the producer to reuse the dust in its cement production. The supplier says that it will yield 35,000t/yr of useable dust. Ssangyong Cement already uses an A TEC Rocket Mill grinding unit in its alternative fuel (AF) production at the Donghae cement plant.
A TEC wins alternative fuels flash dryer contract at Lafarge Hungary’s Királyegyháza cement plant
29 March 2021Hungary: Lafarge Hungary, part of LafargeHolcim, has awarded a contract to Germany-based Loesche subsidiary A TEC for the supply of an alternative fuel (AF) flash dryer for the 1.0Mt/yr kiln line at its Királyegyháza cement plant in Baranya county. The supplier says that the dryer will use residual hot gas from the chlorine bypass system in conjunction with a satellite burner for firing the material in the kiln. The project also includes the installation of a new AF receiving, handling, and dosing system for a second AF flow firing directly into the kiln burner. A TEC says that it will commission the project in the second quarter of 2021 after the end of the plant’s 2020/2021 winter shutdown.
Lafarge Zementwerke appoints A TEC for Mannersdorf cement plant alternative fuels Flash Dryer installation
24 November 2020Austria: Loesche subsidiary A TEC has won a contract for the supply and installation of a Flash Dryer for alternative fuels (AFs) in the kiln line of Lafarge Zementwerke's 1.1Mt/yr Mannersdorf cement plant in Lower Austria. The supplier said that it will complete the project in early 2021.
The company said, “Reaching high thermal substitution rates (TSR) requires firing of alternative fuels at the kiln burner. To reach a stable sintering zone for the required clinker quality a high fuel quality (high LCV, small particle size) is needed, otherwise the clinker quality may suffer or the TSR can be limited. With the A TEC Flash Dryer various waste heat sources can be used (clinker cooler flue gas, bypass gas, preheater gas, etc.). The material is dosed to the hot gas flow in the flash dryer and transported with this gas flow, while the moisture is evaporated, to a cyclone and a subsequent filter where the fuel is separated from the gas flow and on-line fed to a kiln burner or a satellite burner. In addition to the drying the lifting effect of the gas can separate 3D impurities which contributes in a further increase of the fuel quality.”
Stefan Kern appointed head of A TEC
30 May 2018Austria: Stefan Kern has been appointed as the head of A TEC Group. He succeeded Wolfgang Hammer on 1 April 2018. Kern started at A TEC in August 2013 and was responsible for sales activities in Northern Europe, Eastern Europe and South Africa. In 2016 he joined the management board. Kern originally studied chemical engineering in Vienna.
Update on Angola
19 July 2017The old joke about buses only coming along in pairs might just apply to Angolan cement plants this week with the inauguration of Nova Cimangola’s new 2.4Mt/yr cement plant in Luanda. It follows the announcement of the start of an upgrade project to build a clinker kiln at Cimenfort’s grinding plant in Benguela. In cement industry terms for a country with a production capacity below 10Mt/yr these projects are right on top of each other!
Nova Cimangola’s new plant has been a well-publicised project internationally. Sinoma International Engineering coordinated the line for US$400m in 21 months using components from well-known suppliers. Loesche provided a number of raw material, cement and coal mills for the project, including the country’s first vertical roller mill, as well as other components and parts. Loesche’s Austrian subsidiary A Tec also got involved as an EPCM (Engineering, Procurement & Construction Management) partner.
Cimenfort’s clinker kiln project is the third phase of a process to turn its grinding plant at Catumbela in Benguela into a fully integrated unit since it opened in 2012. Earlier phases saw the grinding plant’s capacity increase to 1.4Mt/yr from 0.7Mt/yr by using a new roller press. Work on the kiln is now scheduled to start in January 2018 with completion scheduled for 2020.
If Cimenfort makes it to clinker production they will join the country’s three main producers: Nova Cimangola, Fabrica de Cimento do Kwanza Sul (FCKS) and the China International Fund. Getting that far is by no means certain as the Palanca Cement plant project demonstrates. That scheme was backed by Brazil’s Camargo Corrêa, the owners of InterCement, and local business group Gema. However, the regulators bailed out Portugal’s Banco Espírito Santo, the financial backer of the project, in 2014 effectively killing it. Another project that has gone on the back burner is Portugal’s Secil’s plan to build a second plant next to its grinding plant in Lobito. Originally approved by the Angolan government in 2007 the project has been kicked around since then through various revisions to the local investment body. It was last reported as being under consideration by the president’s office of Angola in 2016.
Ministry of Industry figures place cement production capacity at 8.3Mt/yr compared to a consumption of 6Mt/yr. In contrast to this Secil’s parent company Semapa reported that the Angolan cement market contracted in 2016 by 25% to 3.9Mt in line with the poor state of the general economy, pushed down by poor oil prices. It blamed the decrease in cement consumption on a halt in public infrastructure spending and the negative effect that local currency devaluations had on clinker imports and other incoming raw materials. With the International Monetary Fund (IMF) forecasting economic growth to pick up for Angola in 2017, improvements in the construction and cement sector are expected by Semapa but they hadn’t been seen so far during the first quarter of the year.
The government’s keenness to describe its cement industry as ‘self-sufficient in cement’ mimics calls from other African countries like Nigeria. The Angolan government banned cement imports in 2015, with the exception of certain border provinces, and this has continued into 2017. However, the ban hasn’t stopped the country exporting cement to its neighbours. Earlier this year the head of Cimenterie de Lukala in the Democratic Republic of Congo blamed the closure of his company’s integrated plant on imports from Angola.
All of this leaves an enlarged local cement industry waiting for the good times to come again. In the meantime, exporting cement and clinker no doubt seems like a promising proposition. In the middle of this are projects like those from Cimenfort and Secil that are looking decidedly dicey in the current economic environment. These companies may have just missed the bus to make their upgrades happen. Still, if they wait around long enough, their chance may come again when the market revives.
Aalborg Portland orders two calciners from A Tec
08 March 2017Denmark: Aalborg Portland has awarded A Tec a contract to upgrade its Cement Kiln 87 in Aalborg. It has ordered two calciners for its 4500t/day semi-dry kiln system that was commissioned in 1988. The calciners will be designed and delivered during the kiln’s annual stop in February and March 2017. Commissioning is planned for the spring of 2017. The upgrades are intended to increase production of Ordinary Portland Cement on the line.
A Tec intends to adapt the flow pattern of the calciner system in a way to improve the operational behaviour of the system. The design will be configured for the usage of 100% solid alternative fuels with low emissions. Additionally, the number of kiln stops due fall through cyclone blockages should be reduced. A Tec will conduct the engineering, supply the equipment and will be responsible for errection and documentation.
The new calciner system will be equipped with the A Tec Post Combustion Chamber (PCC) for the optimised mixture of fuels and combustion air in the end section of the calciner. The PCC was specially developed for the achievement of complete combustion of alternative fuels at high substitution rates.
LafargeHolcim Kujawy cement plant in Poland to have chlorine bypass system upgraded by A Tec
17 February 2017Poland: LafargeHolcim has awarded a contract to A Tec to upgrade the chlorine bypass system at its Kujawy cement plant. A Tec will upgrade its existing Reduchlor bypass system to increase the rate to 10% from 5%. The upgrade will retain the system’s existing bypass filter and filter fan. The project will be commissioned in spring of 2017.
A Tec’s Reduchlor bypass system consists of a take-off chamber above the kiln inlet, specifically designed for each installation, and a specially designed quenching chamber, to which the chlorine condenses on and adheres to fine dust particles. After this condensation process the chlorine-enriched material is collected in a filter.
A Tec commissions Rocket Mill in Wiener Neustadt
30 November 2016Austria: A Tec has commissioned a Rocket Mill RM 2.50 for ASA at its waste treatment plant in Wiener Neustadt. The mill has a capacity of 7 – 40t/hr and is equipped with two grinding chambers, which can be independently loaded. Each one has a main drive with 315kW. Due to the grinding technology, it also has an additional drying effect of approximately 10%. The mill is designed to produce refuse-derived fuels (RDF) with an output size of 5 - 80mm from pre-sorted and shredded household and commercial waste. It was principally built at A Tec’s plant in Eberstein.
Austria: A TEC are working on plans to increase kiln output with coarse and lower calorific fuel at the LafargeHolcim Mannersdorf cement plant. The intention is to increase the alternative fuels substitution rate to 100%. Other work being conducted includes lowering emissions and reducing pressure drop in the preheater tower. A higher separation efficiency of the top stage cyclones will also be achieved with increased production capacity.
A TEC will lead on the project as an engineering, procurement and construction (EPC) contractor. The execution of the project will be performed in collaboration with the Czech company Aliacem s.r.o. Přerov. Erection works will start in September 2016 and the whole project will be finished in March 2017.