Cement News tagged under: NOx

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Mitigating acid gas emissions

11 December 2018, Published under Cement News

In this month’s Technical Forum, Dr Michael Clark examines acid gas emissions from cement kilns. Understanding harmful acid gas emissions, such as hydrogen chloride, is required before investing in mitigation strategies. Before investing in new raw material quarries, a better understanding of acid gas emissions is required Emissions from cement kilns are a growing focus of environmental authorities around the world. This month’s Technical Forum will look at the causes and mitiga...

Van Aalst partners Scania in cement carrier project

11 October 2018, Published under Cement News

Van Aaslt has contributed in the development in the first Tier III Scania self-discharging cement carrier called 'NACC Alicudi'. The 120m vessel operates Scania IMO tier III diesel engines with a unique pneumatic conveying system for loading and unloading cement, fly ash and granulated slag. The vessel had to fit the Scania Selective Catalytic Reduction (SCR) system in the engine room deckhouse, which was smaller as the previous non-SCR equipped engine room deckhouse. This resulted into l...

Streamlining China’s cement industry

17 September 2018, Published under Cement News

With China’s cement industry due to reduce its energy use and emissions to levels set out in the country’s 13th Five-Year Plan, South Cement’s Vice Chief Engineer, Chen Yourong, looks at the technological options available to the industry to achieve the plan’s targets by 2020. By Chen Yourong, South Cement Co Ltd/CNBM Group, China. China’s policy makers have set ambitious targets to lower the domestic cement industry’s energy intensity and emissions to the atmosphere by 2020 ...

Finding the missing link

13 December 2017, Published under Cement News

In 2015 Çimsa Çimento’s Mersin plant, Turkey, suffered an increasing number of cyclone blockages, causing severe interruptions to the facility’s grey cement Line 1. After unsuccessful attempts to find the reason for the blockages, a kiln inlet process gas measurement system from sick was installed to provide the missing link between the sulphur content in the kiln process gases and unwanted production downtime. By Felix Bartknecht, SICK AG, Germany, and Sezin Arıkan, Çimsa Çimento Mersin, T...

Kiln emissions – more than just hot air

01 February 2017, Published under Cement News

In last month’s Technical Forum we promised to return to the topic of cement kiln emissions, which were said to be both simple and complex, benign and noxious. The challenge is to see the broad simplicity, which then allows the increasing complexity to be understood. By Dr Michael Clark, UK. Kiln emissions include a wide range of gases – some benign but others noxious At the macro level cement kiln emissions are indeed simple. The raw materials used for manufacturing clinker are...

Going alternative in Japan

12 December 2016, Published under Cement News

With Japanese cement demand falling over the past 20 years, Sumitomo Osaka Cement has constantly evolved its cement manufacturing processes. As a result, the company’s Ako integrated cement plant stepped up its use of alternative fuels and raw materials as part of its efforts to reduce costs and the impact of plant emissions. By Tetsuo Yokobori, Sumitomo Osaka Cement, Japan. Sumitomo Osaka Cement has carried out many improvements at its Ako plant, Japan Sumitomo Osaka Cement (SO...

BLA releases fifth sustainable development report

14 January 2016, Published under Cement News

The British Lime Association (BLA) has released its fifth sustainable development report which presents the industry's progress in 2014. The report features case studies from member companies detailing a range of innovative projects implemented by lime producers to improve their environmental and safety performance. Commenting on the industry's recent achievements, Richard Stansfield, BLA chairman, said: "Lime producers have made some significant and beneficial changes to the lime manufac...

Aalborg welcomes decision to phase out NOx tax

08 October 2015, Published under Cement News

Following Denmark's Budget 2016 announcement, domestic cement producer Aalborg Portland has “warmly” welcomed the government's decision to phase out the NOx tax from 1 July 2016. “It is indeed very good news and a very positive message for us as energy-intensive business that the Government proposes a removal of a Danish special fee which none of our competitors are subject to. It is a strong signal that the Government has confidence in the investment climate in the energy-intensive produc...

Semi-dust SCR at Mannersdorf

28 September 2015, Published under Cement News

The 1.1Mta Lafarge Mannersdorf works in Austria is the country’s largest cement plant and a pioneer of environmental protection within the European cement industry. As part of these endevours, the world’s first semi-dust catalytic reduction (SCR) system was installed at the plant in spring 2012 by Scheuch of Austria. Over the past three years, the existing system has been gradually optimised and guarantees reliable compliance with NOx and NH3 emissions. By Scheuch, Austria. The semi-d...

NOx in the mass balance

14 August 2013, Published under Cement News

Dr Clark discusses how NOx emissions fit into the mass balance of a cement kiln. How do they arise and how can they be controlled and mitigated? Organic nitrogen compounds in the fuel used to fire the cement kiln will be oxidised to NOx in the kiln’s main burner and precalciner During 2012 a popular series of workshops were held in conjunction with the Cemtech Dubai, Jakarta and Geneva conferences on the topic of the fundamental mass balance of a cement kiln. The workshops fe...