Cement News tagged under: manufacturing technology
Dealing with dust16 February 2021, Published under Cement NewsWith dust chemistry varying between direct operation when the raw mill is out of action and indirect operation when the raw mill is running, finding a destination for baghouse dust while maintaining a homogenous kiln feed is a long-standing issue in cement production. By John Kline and Benjamin Kline, Kline Consulting LLC, USA. Figure 1: a typical raw mill and kiln feed configuration The simple question of what to do with baghouse dust when the raw mill is out of operation has p... |
Boosting mill performance02 February 2021, Published under Cement NewsReducing the clinker factor without compromising quality and the rising demand for high-performance cements are great challenges for the fine grinding technology used in cement plants. As part of its green cement plant project, thyssenkrupp has expanded its product range with the polysius® booster mill. While one cement producer has already integrated the mill into an existing grinding circuit, several others have tested the mill since August 2020 and are checking results in terms of specifi... |
ESP morphs into bag filter26 January 2021, Published under Cement NewsWhen electrostatic precipitators are unable to meet tighter emission regulations, it can be more economical to modify them to bag filters rather than replace them with a new bag filter. Gorco SA highlights the key points to consider. By Eduardo Sauto, Gorco SA, Spain. Front view of the new bag filter with internal channel and bag plates Increasingly strict environmental emissions legislation has been a key driver behind the development of advances in gas filtration technology. I... |
Tripling the lifetime of lining11 January 2021, Published under Cement NewsA Vietnamese cement plant has more than tripled the lifetime of the refractory lining in its cooler bull nose by using a precast modular lining from HASLE Refractories. Abrasion and alkali attacks have been reduced significantly, while the solution is also extremely resistant to coating. By HASLE Refractories A/S, Denmark. Figure 1: completed installation of HASLE precast Modular Lining in the cooler bull nose at a cement plant in Vietnam A 5000tpd cement plant in Vietnam, runni... |
The 21st-century cement plant: greener and more connected07 December 2020, Published under Cement NewsThe cement plant of the future will embrace digitisation and sustainability trends to earn a competitive advantage and build resilience. By Eleftherios Charalambous, Thomas Czigler, Ramez Haddadin, Sebastian Reiter and Patrick Schulze, McKinsey & Co Inc, Germany. Smart technology will enable the 21st-century cement plant to be greener and more efficient There has never been a more important time to build resilience into the core of the cement value chain: the cement plant. The c... |
The 21st-century cement plant: greener and more connected07 December 2020, Published under Cement NewsThe cement plant of the future will embrace digitisation and sustainability trends to earn a competitive advantage and build resilience. By Eleftherios Charalambous, Thomas Czigler, Ramez Haddadin, Sebastian Reiter and Patrick Schulze, McKinsey & Co Inc, Germany. Smart technology will enable the 21st-century cement plant to be greener and more efficient There has never been a more important time to build resilience into the core of the cement value chain: the cement plant. The c... |
Keeping an eye on the gears10 November 2020, Published under Cement NewsOne of the greatest mechanical challenges in rotary kiln maintenance today is maintaining the efficient operation of girth gear and pinion meshing. Misalignment during production creates uneven and unstable stress concentration on the teeth, resulting in component damage. An early-warning system can inform kiln operators long before the mechanical problem and any damages appear. By Paweł Kędzior, Havec Engineering Co, Poland. Misalignment of the girth gear affects every rotary kiln at... |
From WHRPG to EfW09 November 2020, Published under Cement NewsAs cement plants search for ways to reduce their carbon footprint, waste heat recovery power generation (WHRPG) systems are becoming more popular. The use of biomass also provides potential as an energy-from-waste (EfW) solution to produce electrical power. Developments in WHRPG and biomass/EfW power generation systems are discussed below, including new technologies for energy saving and environmental load reduction. By Kawasaki Heavy Industries Ltd, Japan. Figure 1: flow of a waste h... |
Energy saving with separate fine grinding13 October 2020, Published under Cement NewsSeparate grinding and subsequent blending is a commonly used practice in the cement industry, enabling the lowering of the specific electric energy demand by using highly efficient comminution techniques. While ball mills are not the most energy-efficient mills, VDZ’s research has shown that in some cases ultrafine grinding by means of a stirred media mill combines the advantages of a ball mill with low overall specific energy demand. By J Knappert, S Seemann and PM Fleiger, VDZ, Germany. ... |
Holcim’s ‘ready to use’ belt29 September 2020, Published under Cement NewsWhen Holcim’s Herrlisheim-près-Colmar site in France was looking to replace its sand extraction conveyor belt, it turned to MLT for its ‘ready-to-use’ belt with ISC ® (Integrated Screw Connection), following the successful installation of a previous project. By MLT, France. Figure 1: Holcim’s Herrlisheim-près-Colmar plant in France installs an MLT belt conveyor with ISC ® (Integrated Screw Connection) MLT (Minet Lacing Technology), based in the Loire region of France, is a ... |