Cement News tagged under: dust
Val d'Azergue plant benefits from new dust filters at Cruas lime works26 September 2024, Published under Cement NewsThe Lafarge France’s lime plant in Cruas has commissioned new dust-proof bag filters to significantly reduce kiln dust emissions. The design and installation of the filters required two years of studies and preparation and eight months of construction. The two high-performance bag filters, each comprising 128 bags (3.5m x 14cm diameter), replace the old water filters dating from the 1970s. Dust emissions at the kiln outlet have been virtually eradicated, measured at less than 0.5mg/Nm 3 ... |
CEMEX utilises by-pass dust for agricultural use26 October 2023, Published under Cement NewsCEMEX and waste management company Silverwoods are utilising by-pass dust (BPD) from the CEMEX Rugby cement plant for agricultural purposes, supporting the circular economy. Since 2015 nearly 130,000t of BPD have been recovered through the partnership. BPD is ideal for use on farmland due to its high potassium and lime content, meaning it can provide a direct sustainable replacement for traditional fertilisers and lime. Additionally, by re-using BPD, CEMEX has been able to dramatically ... |
Holcim US fined for dust emissions22 November 2022, Published under Cement NewsHolcim US is to pay US$100,000 in fines for air pollution violations following reports of large clouds of cement dust leaving its factory in Theodore , Mobile County, USA. According to Al.com, Holcim US has agreed with the Alabama Department of Environmental Management (ADEM) to play the fine and comply with its permit requirements to “prevent fugitive dust emissions.” Multiple complaints from members of the public about large dust clouds, along with reports by ADEM inspectors, were re... |
Effects of recirculation cells in cement kilns31 August 2021, Published under Cement NewsAs the raw material passes through the cement production process, recirculation cells are created. Due to the heterogenous nature of the fine materials, the composition in each cell is not uniform and as such, recirculation cells can impact on the final product. Figure 1: example of the relationship of hotmeal LSF to clinker LSF The manufacture of Portland cement clinker is necessarily concerned with the handling of very fine grains or dusts at various stages of production. Firs... |
Selecting the right SCR system29 June 2020, Published under Cement NewsHeavy dust loads and high temperatures are two of the most-challenging factors for DeNO x systems in the cement industry. In this article thyssenkrupp Industrial Solutions with its CemCat brand for SCR systems, explains the success story of its specialised high-dust SCR system to reduce operating costs and the risk of kiln stoppage. By thyssenkrupp Industrial Solutions (China) Co Ltd, China. Figure 1: for more than 14 years, CemCat has built high-dust SCR plants worldwide to help ... |
Vietnamese authorities enforce environmental control18 July 2018, Published under Cement NewsAuthorities in Quang Ngai province, Vietnam, have threatened to shut down a plant in Binh Dong Commune if its management does not improve air quality and dust emissions, according to Viet Nam News. The 0.5Mta facility began operations in 2012 and received upgrades in 2015 but is still reportedly affecting local villagers. The provincial chairman, Tran Ngoc Cang, said the province wanted to relocate 427 households living near the plant, but needed VND989bn (US$44m) for the plans. The provinc... |
Fabric filtration comes of age31 July 2017, Published under Cement NewsFabric filtration is increasingly seen as the best-available technology to help producers meet their goals, and with good reason. FLSmidth has introduced two important innovations in this area. Firstly, extra-long filter bags prevent the formation of a filter cake on the outside of the bags. Secondly, a side inlet for gas and dust extends the bag’s life time and reduces the need for maintenance, process control and troubleshooting. By Henrik Vittrup Pedersen and Pietro Aresta, FLSmidth Airte... |
Balancing dusts in the kiln08 April 2015, Published under Cement NewsChemically the expectation for a cement clinker is that it will have the same overall chemical composition as the raw materials from which it is made, less any gaseous emissions and plus any ash provided by the fuels. However, much happens between the raw materials entering the raw mill and the emergence of the clinker. Figure 1: typical LSF of materials through a kiln Much of the variation in the bulk chemistry of the material passing through the system is related to the creati... |
Cyclic processes10 July 2013, Published under Cement NewsThe Technical Forum has covered the topic of the cyclic processes taking place in a cement kiln on a number of occasions over the last 15 years. Regular readers may think that there is not much more to be said on the subject. However, these processes remain one of the most frequent sources of questions and, therefore, it is perhaps time to revisit this topic. In one of the many cycles operating in a cement plant, alkali salts evaporate in the burning zone and are carried back to th... |
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