Cement, Energy and Environment

+ ln case of chill casting, only profiling with Niobium carbide based complex chromium carbide is used, employing automatically controlled CNC. + Bime ta lli c cas tings are not weld ed normally. The roll that was repaired ( by Corewire, UK) has been in operation for more than 6000 hrs although the guarantee was for only 4000 hrs. it may also be unique as it was built up by mm. Courtesy : World Cement, MM. 02, Pp. 57-59, Enquuy no. 6. Email: mail@worlclccment.com Web: 1-vww. worldccment.com SF CROSS -BAR COOLER ENTERS FRANCE Lafarge's La Couronne facility some 100 km northeas t of Bordeaux w ill be the first French cement plant to ins tall this new type of cooler. The customer has chosen an SF 3x4f Cross-Bar cooler to replace the existing gra te cooler. As the clinker at the La Couronne plant is very fine, La farge was keen to know whether the SF Cross-Bar cooler cou ld hand le it without spillage, this being a major problem with the exis ting cooler. Another requirement was to secure hot air from the cooler within a specific temperature range to dry raw materials. Avisit to the Monselice cement plant in Italy was arranged to inspect the SF Cross-Bar cooler there, which has been operating successfully since it replaced a traditional grate cooler several years ago. The entire shutdown of kiln and cooler, which began on 19 January, is scheduled to last 60 days. Courtesy: H ighlights Apr. 2002, P 4, }ax: +453630 1820 Email: info@flsmidth. com Web: www. flsmiclth. com THE HEART OF THE OPERATION A /exander Anagnostopoulos, Haslc Refractories A / S DenmMk The heart of the operation in a rotary lime ki ln is the calcining process, i.e. the conversion of limestone (CaC0 3 ) into lime (CaO). This article describes Hasle's p recast tumbler lining system that is used in the ca lcining zone of the lime kiln and the benefits gained from its installation. The system, among other things, is designed to maximize the cascading action, to improve the conductive and convective heat transfer, to reduce the energy consumption per ton of output, and stabilise the operation of the kiln. The Hasle precast tumbler lining system was designed to prevent core formation resulting in a uniform flow, a nd to improve the hea t exchange between the ch arge a nd the combustion gases without creating dust. + The tumblers stir, and permanently renew the surface of the charge. + The tumblers prevent the charge from sliding on the lining surface. + The tumblers tend to retain the ch <~rge . + The tumblers are designed so th<1 ~ c mooth slide allows the charge to slide t Courtesy: World Cement Apr. 2002, Pp 55-57, Enquizy 110. 8 Fax: +44(0) 1252718992 Email: mail@worldcement.com Web: www. worldcement.com