Cement News tagged under: alternative raw materials

RSS feed

Co-processing – here to stay

16 December 2015, Published under Cement News

Co-processing is a major topic for this edition of ICR and, of course, an increasingly major theme for the world cement industry. One of the roles of the Technical Forum is to explain the technology and terminology deployed in the cement manufacturing industry, so this month we will take co-processing as our topic. Co-processing enables further use of waste products such as tyres, avoiding landfill or dumping What do we mean by ‘co-processing’ in the cement industry? Essentially...

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...

Brazil: alternative raw materials usage among 'best in the world'

09 February 2015, Published under Cement News

The proportion of alternative raw materials used in Brazilian cement is one of the best in the world, country's leading cement producer reports, citing domestic construction industry association SNIC. “Brazil has one of the highest clinker substitution rates in the world and this is due to industry research and the development of technologies to incorporate natural substitutes and even steel industry dejects into cement manufacture”, says Edvaldo Rabelo, executive director of energy, sustai...

Cement at the heart of Europe

13 May 2013, Published under Cement News

A recent study by the Boston Consulting Group for CEMBUREAU claims that the cement industry has a key role to play in helping Europe achieve its goals of developing a sustainable, resource efficient and innovative society. ICR looks at the current challenges facing the region’s cement producers and what action its policymakers can take to help them remain competitive. Putting cement at the heart of Europe: the application of green concrete at the Royal Danish Playhouse in Copenhagen, ...

Balancing volatile behaviour

28 May 2012, Published under Cement News

Following on from last month’s Technical Forum about the impacts of alternative fuels and raw materials, Dr Michael Clark examines the effect on kiln emissions, using the mass balance of the cement kiln as a starting point. Metallic mercury and mercury compounds are too volatile to pass down the preheater into the rotary section of a kiln What goes into the cement kiln must either come out in the clinker product or the emissions from the kiln, or it must be retained and built...

Using alternative raw materials

18 April 2012, Published under Cement News

The changes made to the production process of a cement plant by utilising different alternative raw materials can not only alter the dynamics of how a plant operates but can also affect the cost of production and cause blending and handling problems, says Arthur Harrisson. The addition of supplementary raw material alternatives such as foundry sand can also add difficulties when seeking to achieve a sufficiently fine raw mix. Switching from limestone to alternative raw materials can a...