Cement, Energy & Environment Jan-Mar 2002

Acoustic horns operate on standard plant air. Typically, an acoustic horn will sound for 10 seconds every 10 minutes. At a normal volume ef60 SCFM, this equates to an average air consumption of just one SCF per acoustic horn per minute. Typical frequencies employed with acoustic hon1s are in the 75 to 360Hz range, which do not cause any structural damage in steel or concrete structure. Courtesy: Interna tional Workshop on Petcoke and Seminar on Energy and Envirorunent in Cement Production and Sus tainable Construction, 29-31 jan, 2002, New Delhi, Proc. Vol., Pp S-ill 29-37. E-mail: nccbm@giasdlOl .vsnl.net.i.I1 Web: Cementresearch.com MINERAL ADDITIONS IN ORDINARY PORTLAND CEMENT 1\. L. Sllrmil; Cmsim Industries Ltd, (White Cement Division), D-7, Shilsln Nil gill; Jodhpur 342 003. The author discusses the quality specifica– tions, use, advantages, economical and envi– ronmental benefits of the use of mineral ad– d itives in cement or concrete. Three different types of mineral additives are discussed - la– tently hydraulic, pozzolanic and fill er mate– rials. The author holds that it is now known that cemen t alone cannot perform better un– less some amounts of mineral additives are mixed with it. Courtesy: Indian Cement Revie1v, Dec. 2001, Pp 9-18. Fax: 091-22-2072102 GRINDING OUT RESULTS Hci.Ilz U Schaefer, Loesche Gmbh Over the yea rs, grinding techniques have changed and vertical mills have become more popular. It has also been proven that the grinding process can be improved by the application of interparticle comminution by using the dry grinding process. In this article, Dr Heinz s·chaefer of Loesche, discusses how Loesche mills used for the dry comminution of ores and minerals, have shown that in particular cases, the recovery and the grade of the product can be enhanced compared to conventional wet grinding processes in tube mills. Courtesy: International Cement Review jan 2002, Pp54, E-mail: info @CemNet. co. uk Web site: CemNet. co. uk QUALITY AND STANDARDS NEW TECHNIQUES IN X-RAY DIFFRACTION Roger Meie1~ Philips A nalytical, Alm elo, The Netherlands The paper discusses new developments that put X-ray diffraction on the map as a fast analytical tool in modern cement production. Cement · manufac turer s can take full advantage of new XRD techniques in both research and process control to improve their product, minimize kiln energy consumption and reduce harmful emissions in production processes. Allied to developments in detector teclu1ology come software development that s implify diffractometer operation and comp licated ta sks s uch as phase identification. The software developments at last transform XRD from a specialis t techniqu e requiring considerable knowledge and experience, to one that can be used even by less experienced operators. Compared with traditional X-ray detectors, the X'Celerator provides up to a 100-fold reduction in recording time fo r power diffractograms, so scans previously requiring 29