Cement News tagged under: Manufacturing technology
Fly ash or GGBS?21 October 2013, Published under Cement NewsFly ash and ground granulated blastfurnace slag (GGBS) are regarded as conventional cement constituents in much of the world. The proportions used in concrete-making vary quite considerably and the price of the material is key when it comes to producing a cubic metre of concrete to the required specification at the lowest possible cost. Blastfurnace slag, a by-product of the iron-making process, is rapidly quenched if it is to be used in the manufacture of GGBS The terminolog... |
Thoughtful design09 October 2013, Published under Cement NewsGood cement plant design reconciles a plant’s functional demands with the need for a sustainable environment for the local community. A well-considered design should bring together productivity targets while taking into account the plant’s urban context, surrounding landscape and architecture – all key elements of thoughtful cement plant design. By Thierry Bogaert, Bogaert Architecture, France. When designing a cement plant, as well focussing on productivity targets it is also import... |
Modernising for the future08 October 2013, Published under Cement NewsNext year marks the Italcementi Group’s 150th anniversary. Despite the current economic difficulties that are heavily impacting the construction materials sectors, particularly in industrialised countries, the global cement major remains committed to improving competitiveness, efficiency and environmental performance in its industrial network. During this milestone year the modernisation of the Devnya works in Bulgaria is one of the company's key investments as it looks ahead to a long, sus... |
Cement mill output11 September 2013, Published under Cement NewsFollowing the Cemtech Asia technical workshop in Jakarta in June, Dr Clark decides that the blended cement workshop needs to be expanded to cover broader topics. Starting by considering the reasons for the current proliferation of mini-cement grinding plants around the world, he then moves onto the technical aspects of how energy consumption and output of a cement grinding system can be predicted. The output of the mill can easily be predicted by knowing the energy consumption of t... |
Unleashing dry bulk potential23 August 2013, Published under Cement NewsThe use of advanced automation technologies in the dry-bulk industry has become a key success factor to establish an efficient, high-quality and competitive supply chain that is significantly improving the ‘capital-efficient tonne’ output. Optimised and unmanned operation of dry-bulk equipment now receives assistance from FLSmidth as the company offers its BulkExport™ solution. By FLSmidth, Denmark. There are currently more than 30 BulkExpert systems in operation with various combinat... |
Fly ash handling solutions20 August 2013, Published under Cement NewsPart of HeidelbergCement, Cementa AB in Slite, on the island of Gotland in Sweden, is one of Europe’s most modern and energy-efficient cement plants. Bulkteknik Sweden recently finished building a new, highly energy-efficient fly ash handling solution for the cement works. By Bulkteknik AB, Sweden. Bulkteknik Sweden recently completed a new, highly energy-efficient fly ash handling facility for Cementa’s Slite plant The new fly ash handling facility is a complete turnkey solutio... |
Using multiple raw materials17 July 2013, Published under Cement NewsThere are very few cement plant locations where a single, locally-available raw material source will be suitable for producing cement clinker. Even when the quantity of imported material is small, the costs of transporting, handling, proportioning and feeding extra raw materials can mount up and with each additional material another variable is introduced. So how does the benefit of sweetening the mix weigh against the disadvantages? How does the benefit of sweeting the raw materials ... |
Cyclic processes10 July 2013, Published under Cement NewsThe Technical Forum has covered the topic of the cyclic processes taking place in a cement kiln on a number of occasions over the last 15 years. Regular readers may think that there is not much more to be said on the subject. However, these processes remain one of the most frequent sources of questions and, therefore, it is perhaps time to revisit this topic. In one of the many cycles operating in a cement plant, alkali salts evaporate in the burning zone and are carried back to th... |
Keeping things moving17 June 2013, Published under Cement NewsITW Krafft and ITW ROCOL, suppliers of lubricants to the cement industry for over 30 years, highlight the importance of lubricating the kiln’s loose tyres and the various lubricants available. Figure 1: clearance between kiln shell and tyre To extend the life of any mechanism, good lubrication is vital. This depends on many factors including the lubrication method (manual, automatic, pulverised), the lubrication interval and the cleanliness of the environment. The choice o... |
Improving bearing life10 June 2013, Published under Cement NewsThe working conditions of a cement plant do not foster long service life for machinery due to dust, heat, moisture and vibration. Therefore, it is essential that every opportunity is taken to improve equipment efficiency and reliability. Bearings are common to most pieces of equipment and in this report, NSK Europe explains how improving the service life of this critical component can result in significant cost savings. Poor lubrication and high contamination levels cause 80 per cent of p... |