International Cement Review articles tagged under : Tech Forum

31 August 2021 Arthur Harrisson

Effects of recirculation cells in cement kilns

As 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 necess...

08 June 2021 Dr Michael Clark

Advanced grinding technology to reduce CO2

Dr Michael Clark considers the role of grinding technology in reducing clinker content but retaining the cement strength class. The first industrial installation of a polysius® booster mill was at Bursa Ciment...

05 May 2021 Dr Michael Clark

The industry’s response to the decarbonisation challenge

Dr Michael Clark discusses the cement sector’s response and strategies in terms of the large-scale challenges involved with decarbonisation. LafargeHolcim’s Richmond plant in Canada, where it launched Project ...

13 April 2021 Arthur Harrisson

Belite size distribution

Belite size is affected by several factors ranging from raw materials, the length of the burning zone, the fuels used in the production process as well as the conditions in the cooling zone.  Figure 1: example...

Alkali-activated materials 16 March 2021 Arthur Harrisson

Alkali-activated materials

While blastfurnace slag and metakaolin are known to produce a binder phase following alkali activation, the range of alkali-activated materials is wider than these two materials. This month Arthur Harrisson provides ...

08 March 2021 Dr Michael Clark

Financial ratio analysis

Cement producers should use financial ratio analysis to compare their performance with others around the world. However, this must be combined with peer group analysis to account for differing operational circumstanc...

Fly ash and pozzolanas 08 March 2021 Arthur Harrisson

Fly ash and pozzolanas

The drive for alternative raw materials has put the spotlight on fly ash and pozzolanas. However, their use in cement has been around for some time. This month Arthur Harrisson looks at their origin and performance i...

08 December 2020 Arthur Harrisson

Process, mineralogy and cement quality

This month Arthur Harrisson looks at the relationship between temperature differences in the clinker manufacturing process, the composition of clinker produced and the quality of the final cement. Figure 1: va...

24 November 2020 Dr Michael Clark

Determining the cost

In this month’s Technical Forum, Dr Michael Clark considers how to reduce electricity costs by looking at how much is consumed and ways to lower the price of energy. While this is less of an issue in countries with l...

28 September 2020

The last iceman in west Africa

Dr Michael Clark takes a look at the history of the cement industries in Côte d’Ivoire, Burkina Faso and Togo, which have each seen an influx of new capacity surplus to demand.  Regarding the strategy behind the comp...

13 July 2020 Dr Michael Clark

The dangers of debt

In this month’s Technical Forum, Dr Michael Clark considers how the history of the Kenyan cement industry can serve as a case study for some of the dos and don’ts of the sector. Going forward, impaired sales performa...

30 June 2020 Dr Michael Clark

Preparing for a financial crisis

Dr Michael Clark looks at how the global health emergency of the COVID-19 pandemic is expected develop into a financial crisis, and the potential impacts of this for the cement industry. By looking back over the past...

24 March 2020 Dr Michael Clark

Cement plant and company readiness for the COVID-19 pandemic

The cement industry must now prepare for the global COVID-19 pandemic As this extraordinary Technical Forum is being written, the world is reeling from the impact of the COVID-19 pandemic. Italy, Spain and ...

18 November 2019 Arthur Harrisson

Magnesia in clinker

Magnesia is often present in clinker as periclase, which is formed of free MgO. However, periclase does not always provide a welcome part of the clinker’s composition and can lead to significant volume expansion of t...

21 October 2019 Arthur Harrisson

Progress in quantification of clinker phases

The quantification of clinker phases is not always straightforward and often raises a number of questions. However, there has recently been significant progress in this area, as outlined below. Figure 1: share...

07 October 2019

New opportunities for Europe

Dr Michael Clark looks at how the EU ETS is expected to change the face of European clinker manufacture. With the price of carbon credits rising, it could become more economically viable to import clinker and grind i...