Cement News tagged under: Technical forum

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Determining the cost

24 November 2020, Published under Cement News

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 low electricity costs, the lack of incentive to reduce costs could be a different kind of problem. Figure 1: the electricity cost of cement grinding The cost of something is a function of the price paid and the amount purchased or consumed. It is obvious, but there ar...

The last iceman in west Africa

28 September 2020, Published under Cement News

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 companies investing in new facilities, it could be a case of defending market share in a hugely competitive environment. HeidelbergCement’s clinker plant in Tabligbo, Togo The inspiration for this month’s Technical Forum came from the CemNet webinar held on Wednesday, 3 ...

Cement plant and company readiness for the COVID-19 pandemic

24 March 2020, Published under Cement News

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 France are in complete lock-down with citizens required to remain in their homes. The UK and the United States are not far behind needing to impose such drastic restrictions. In the UK sweeping restrictions were introduced on Monday, 23 March. All social gatherings in restauran...

Evaluating an EPC project

30 January 2019, Published under Cement News

In this month’s Technical Forum, Dr Michael Clark looks at the essential factors that cement producers must take into account when choosing the right contractor for a potential EPC project. Time to completion is an important factor to consider, as it will impact the net present value At the beginning of each year, ICR provides an update on new cement capacity projects around the world. Capacity development projects are an infrequent and possibly unique event for a cement company...

Vocational qualifications

08 April 2014, Published under Cement News

Dr Clark is caught up in the ‘spring clean’ of his office but finds that in having to throw away some long-unused resources he is reminded of some past involvements that have merit for today’s cement industry. Vocational training is a great way for trainee cement plant professionals to learn their trade In every organisation there is a periodic need for a tidy-up and clear-out of issues and resources that are no longer relevant to the business. It is perhaps not surprising that ...

Dependency: Part 2

03 February 2014, Published under Cement News

In the second of a two-part Technical Forum Dr Clark continues his exploration of the complex dependencies involved in delivering a successful cement project. The fictional cement company, Ruritania Cement, is used to illustrate those dependencies from the placing of a contract and the contract-effective date to the day when the first cement is delivered to a customer from the cement plant. This was indeed a proud moment for Ruritania Cement, even though it was more than six years sin...

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...

Making step changes

08 May 2013, Published under Cement News

Dr Clark recalls the step changes in cement kiln technology and capacities that were provided by preheating and precalcining technologies. Modern day cement kilns have huge output capacities in comparison to their more basic predecessors. Long kilns needed large supporting structures Among the topics for ICR this month are preheaters and precalciners. These are items of equipment all modern cement manufacturers are well aware of or even perhaps take for granted. Those of us with...

Gaseous emission control

12 December 2012, Published under Cement News

With acid gas emissions being one of the topics of this ICR issue Dr Clark reflects on previous Technical Forums on this subject and the latest offerings from WL Gore in this regard. WL Gore deNOx technology The control of the acid gas emissions NOx and SO2 is periodically discussed in the Technical Forum along with the control of other gaseous emissions such as unburnt hydrocarbons, dioxins, furans, mercury and other heavy metals. The chemistry underlying the origin and mitigat...

Top-cycle heat recovery

15 August 2012, Published under Cement News

With the publication of an article on the Holcim Lägerdorf kiln in this month’s ICR, Dr Michael Clark muses on the mass and energy flows of such a semi-wet kiln system, even speculating that there will be differences in those energy flows required in winter and summer. Holcim Lägerdorf is the starting point of this month’s Technical Forum’s foray into mass and energy flows of semi-wet kiln systems   Recent Technical Forum articles have largely been focused around the cemen...