Cement News tagged under: environment

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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...

Ras Al Khaimah-based cement company sees temporary environmental shutdown

20 October 2014, Published under Cement News

The UAE Ministry of Water and Environment has closed a Ras Al Khaimah cement factory in Khor Khuweir for a month. The plant has not complied with rules under Cabinet Resolution No 24 of 2011, relating to the protection and development of the environment. Ministry spokesmen Ghanem Al Shamsi said the decision came after specialists from the external audit department visited the facility and reported a number of violations, according to local newspaper The National.

Best-practice APC selection

15 October 2014, Published under Cement News

Unforeseen shutdowns in air pollution control systems (APC) can be the result of insufficient process knowledge and lack of understanding of individual plant requirements. Moreover, increased dust emission due to low-quality or inadequately-designed APC equipment not only impacts a cement plant’s environmental footprint but can also cause extensive wear on other equipment, such as filter fans, which increases overall maintenance and operational costs. By Ahsen Hussain, FLSmidth, Denmark. ...

UltraTech Cement's power provisions

16 September 2014, Published under Cement News

In India, finish grinding typically consumes around 40 per cent of power while raw material preparation and clinker burning account for an additional 30 per cent. Therefore, an uninterrupted power supply is key to the smooth operation of any cement plant. To ensure such a supply, UltraTech Cement has recently commissioned captive power units at its Rawan, Rajashree and Andhra Pradesh works and is expanding its power provision with other forms of clean energy. By UltraTech Cement, India. ...

Carbon conversion projects

03 September 2014, Published under Cement News

Innovative carbon conversion and/or utilisation projects aim to reduce the CO2 in the atmosphere by converting it into useful products, rather than sequestering it. Although most commonly encountered in the area of biofuels, there are many other applications. Carbon conversion and utilisation is the area where the highest level of future activity is anticipated. By Charles Kline & John Kline, Kline Consulting LLC, USA. Figure 1: The Skyonic SkyMine ™ project schematic simplified ...

The promise of carbon capture

13 August 2014, Published under Cement News

As cement companies consider ways to lower their CO2 emissions, carbon capture is expected to provide a key component of their efforts. While first-generation carbon capture technologies have been around for application in other sectors, the cement industry continues to look for an economical way to capture carbon that is also suitable for use in cement plants worldwide. By Charles Kline & John Kline, Kline Consulting LLC, USA. Figure 1: overview of broad categories of CO2 capture tec...

Kenya's waste tyre drive

04 August 2014, Published under Cement News

On behalf of the German Ministry for Cooperation and Development (BMZ), the Deutsche Gesellschaft für Internationale Zusammenarbeit (GIZ) GmbH is currently supporting the Kenyan government to implement a sustainable and environmentally-sound waste tyre management system in the east African country. For this purpose a Strategic Alliance has been established between GIZ and companies from the cement industry, from the tyre sector (tyre traders, tyre producers) and from the road transport secto...