Cement News tagged under: manufacturing technology
Sulphate in clinker26 November 2018, Published under Cement NewsThe amount of sulphate (SO 3 ) varies widely in cement clinker. Arthur Harrisson discusses the sources of SO 3 and its impact on clinker composition. Figure 1: relationship between the contents of sulphate and aluminate in alite crystals from two cement plants The four main phases in Portland cement clinker are alite (C 3 S), belite (C 2 S), aluminate (C 3 A) and ferrite (C 4 AF). As has frequently been discussed, the chemical compositions suggested in brackets for these compou... |
Kiln maintenance14 November 2018, Published under Cement NewsIncreasing competition within the cement industry and growing concerns about sustainable cement production have placed more rigorous demands on maintenance in cement plants, including the maintenance of the kiln. Therefore, kiln maintenance requires a more dedicated focus than ever. By Dr Nijat Orujov and Frank Henning, VDZ, Germany. Figure 1: walk-by inspection on the kiln roller Driven by a competitive business climate and growing concerns about environmental protection, maint... |
Bring in the drones03 October 2018, Published under Cement NewsIn the last few years commercial drones have become increasingly common in quarries all over the world. But how does the use of drone technology impact quarry operations? For specific tasks drone technology can totally overhaul traditional methods. By Propeller Aero, Australia. For specific tasks, such as a quarry’s end-of-month reconciliation, the use of drones can bring significant benefits to quarry operations Drones improve data-capture speed and are much more user-friend... |
Strength predictions03 October 2018, Published under Cement NewsA prediction of strength in concrete can be made through a range of methods and with numerous variables. To facilitate this, Arthur Harrisson examines the key factors that control strength development in concrete. Figure 1: cement 28-day strengths Various methods have been developed to predict the strength that a concrete may reach with a particular combination of cement, supplementary cementitious materials (SCMs), aggregate, admixture and even water. The variables are numerous... |
Separation revisited20 September 2018, Published under Cement NewsEven a high-performing system can be made more efficient, as global plant engineering and construction specialist thyssenkrupp Industrial Solutions demonstrates with the sepol® separator. Thanks to technical optimisation, the separator increases the throughput of grinding plants at the same power consumption, thus considerably reducing the energy costs per tonne of cement. By Dr Martin Botsch and Matthias Raus, thyssenkrupp Industrial Solutions, Germany. Figure 1: impact of grinding a... |
Self-healing concrete10 September 2018, Published under Cement NewsThe formation of cracks in concrete is a common occurrence and in many cases is not regarded as a major issue. However, in some circumstances they may pose a threat to a concrete structure if its purpose is to prevent the movement of water or if there is a risk of the ingress of deleterious materials. Research is underway in a number of locations to investigate ways of encouraging healing of the cracks without major intervention. Figure 1: microcracks in concrete (cracks are up to 0.0... |
As white as white20 August 2018, Published under Cement NewsProducing white clinker and cement requires the right raw materials and mix, the right fuel and optimal plant process conditions. JK Cement Works Fujairah explains what action it takes to keep its white clinker and cement at the highest possible standard. By Subhash Kumar Jain, JK Cement Works Fujairah (JKCWF), UAE. JKCWF is the world’s first dual-process technology cement plant capable of producing white cement and grey cement through the same kiln JKCWF, a subsidiary of JK ... |
Analysing raw mix control20 August 2018, Published under Cement NewsThe monitoring and control of the chemical composition of the raw meal is a key function at a cement plant, not only in terms of delivering a high-quality end product, but also for avoiding the negative impacts on a range of other production costs. The latest-generation analyser-based raw mix control provides a more accurate and timely flow of raw mix data. By Tom Dannemiller and Nichelle Worthington, Sabia Inc, USA. Raw mix analyser in position Controlling the chemical composit... |
Are you ready2grind?08 August 2018, Published under Cement NewsFlexible deployment of grinding plants with rapid installation and commissioning enables cement companies to improve their competitive edge as market requirements change and different products are needed. To meet this call for more flexible options, grinding specialists have introduced compact, mobile grinding units with very short lead times. Gebr Pfeiffer introduces us to its ready2grind units. By Andreas Schieler, Gebr Pfeiffer SE, Germany. Figure 1: flow sheet of ready2grind unit ... |
Flexible grinding08 August 2018, Published under Cement NewsModular grinding plants provide cement producers with greater flexibility when rapidly deploying assets in or near fast-expanding markets to benefit from their first-mover status. By Moisés Rodríguez Núñez and Eduardo Granados, Cemengal, Spain. The Plug&Grind® XL modular grinding installation has a grinding capacity of 0.25Mta The challenging market environment in recent years has prompted cement companies to postpone or cancel capacity projects and look at new ways of expanding... |