Cement News tagged under: environment

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Harnessing CO2

19 August 2015, Published under Cement News

The worldwide anthropogenic emissions of CO2 in 2013 were estimated at 37Gt, according to the IPCC and IEA, including the cement industry’s contribution of 2-2.5Gta, ie 5.5-6.5 per cent of the world total. Therefore, it is key that the cement industry develops new products and technologies that mitigate its CO2 emissions. Over the last nine years, Lafarge has been leading or participating in this initiative. The need to mitigate CO2 emissions drives the cement industry to develop new ...

India: pollution draws protesters onto streets in Khrew

28 July 2015, Published under Cement News

Demanding an end to pollution from cement factories and illegal mining in the area, hundreds of residents of Khrew in Pulwama district protested and held a strike for a third consecutive day. The residents took to streets and staged a sit-in on the main road near the cement factories. They protested against the factory owners and demanded installation of pollution control devices. They were also demanding end to illegal mining and deforestation near the factories. “There are seven cement...

Composite matters

06 July 2015, Published under Cement News

As a new waste law that prohibits the dumping of glass fibre-reinforced composite waste comes into force in Finland in 2016, waste producers are considering alternative waste disposal options. One solution is to co-process this material in cement kilns. Via its LUMI-project, Ketek of Finland carried out research into the viability of this proposal. By Pekka Erkkilä, Technology Centre Ketek Ltd, Finland. Typical composite waste from boat production Options to recycle glass fibre-...

Challenges and opportunities

29 June 2015, Published under Cement News

With limited fossil fuel reserves suitable for cement production, India is seeking to increase its use of alternative fuels. In this undertaking, the country faces significant and wide-ranging challenges. However, the past few years have seen varied opportunities open up for cement producers to improve their substitution rates. Figure 1: major concentrations of cement plants in India The Indian subcontinent presents its cement producers with a unique combination of challenges. T...

CO2 mineralisation

22 April 2015, Published under Cement News

The mineralisation of carbon dioxide (CO2) can provide significant environmental benefits in a world where climate change is at the top of the agenda. For the cement industry, it is an option to lower that carbon footprint and supply an aggregate replacement to the concrete sector. This article explains the benefits and challenges faced by industry to turn CO2 mineralisation into a viable option. By John & Charles Kline, Kline Consulting LLC, USA. Figure 1: relative abundance of eleme...

Carbon trading – state of play

09 March 2015, Published under Cement News

Low prices and generous free allowances have meant that the cement and lime industry has been relatively unfazed by the European Emissions Trading Scheme (EU ETS). Is this about to change? By Philipp Ruf, ICIS Tschach Solutions, UK. Figure 1: post-2013 carbon price development in terms of EUA price Go around the table at the board meeting of many cement and lime producers, and ask about their strategy for dealing with the European Emissions Trading Scheme (EU ETS). You’ll likely...

Out of aluminium waste

23 February 2015, Published under Cement News

To reduce natural raw material use, the cement industry is increasingly considering byproducts from other industrial processes such as spent pot liners supplied by the aluminium industry. However, these often need to be refined to adapt them to the demands of the end-product. By Dr Yves C Zimmermann, Regain Services Pty Ltd, Australia. Figure 1: molar alkali-sulphur balance in Portland cement clinker Refined byproducts derived from the primary aluminium industry’s spent pot lini...

Closing the recovery gap

18 February 2015, Published under Cement News

As the pursuit for better waste management practices in developing countries continues by overcoming barriers and changing mindsets, Geocycle Indonesia is playing its part in closing the country’s waste recovery gap. The company’s new 160,000tpa GreenZone waste-to-fuel processing facility near Jakarta will be the largest unit of its kind in southeast Asia and add much-needed capacity to Indonesia’s industrial waste management infrastructure. By Dr Vincent Aloysius, Geocycle Indonesia. ...

Scaling up MSW models

10 December 2014, Published under Cement News

The effective management and disposal of municipal solid wastes (MSW) in India has become a major concern. Forecast rapid urbanisation, uncontrolled population growth and rising per capita income are expected to exacerbate the issue. As a result, the co-processing of MSW in cement kilns is becoming an increasingly-attractive option. Figure 1: share of major Indian states in MSW generation The significance of the MSW management and disposal issue is underlined by India’s Prime Mi...

NOx reduction at Vidal Ramos

05 December 2014, Published under Cement News

To lower NOx emissions Votorantim Cimentos decided to install SNCR equipment as well as implement alternative fuels (AF) use at its Vidal Ramos plant, Brazil. This required the optimisation of the urea injection system to ensure the lowest-possible consumption of the reducing agent before and after the introduction of the AFs. By Mario Henrique Interlenghi & Carlos Roberto Moreira da Cunha, Votorantim Cimentos, Brazil. Votorantim Cimentos’ greenfield Vidal Ramos plant in Brazil has op...