{"id":6230,"date":"2017-12-15T13:19:53","date_gmt":"2017-12-15T12:19:53","guid":{"rendered":"https:\/\/2025.mining-report.de\/english\/?p=6230"},"modified":"2017-12-15T13:19:53","modified_gmt":"2017-12-15T12:19:53","slug":"complete-scraper-replacement-feasible-rational-planning","status":"publish","type":"post","link":"https:\/\/mining-report.de\/english\/blog\/complete-scraper-replacement-feasible-rational-planning\/","title":{"rendered":"Complete scraper replacement: \u201cOnly feasible with rational planning\u201c"},"content":{"rendered":"

Replacing scrapers on a conveyor belt system is almost always a lengthy process for any company. In the case of the Hohenlimburger Kalkwerke in Germany, the whole process took almost two years. <\/span><\/p>\n

Ulrich Kolhagen is a mining engineer (Figure 1 ). After completing his studies, he started work in an ore mine and since 1989 he says, \u201cI\u2019m a quarry man\u201d. He is operations manager at Hohenlimburger Kalkwerke, where Devonian hard limestone is quarried and treated. The plant is one of the few in Germany that washes its material, putting high demands on the conveyer belt system. Some 40 belts ensure that the broken limestone, stone chippings and frost proof gravel reach their transfer points. \u201cScraper replacement is almost always a lengthy process\u201d, says Kolhagen. It took almost two years before all the equipment – with a few exceptions – was replaced with Starclean scrapers from the German manufacturer F.\u00a0E. Schulte Strathaus GmbH & Co. KG, Werl, a member of FESS Group. As the operations manager explained, it was a gradual pro-cess. When a scraper reached the end of its service life, it was replaced by a new one. Eight were replaced in one go during the winter overhaul. Kolhagen: \u201cIt\u2019s only feasible with rational planning. Production has to continue.\u201d<\/span><\/p>\n

The need for what the company described as \u201ca considerable investment\u201d were poor cleaning results. \u201cThere was too much carryback underneath and next to the belts\u201d. Differing granulations and humidity of the material being transported put the scrapers under relatively high stress, particularly since quite a large amount of fine material demands fine scraping. Belt centre distances are between 7 and 220 m, with belt widths between 650 and 1,400\u00a0mm. Many aspects had to be taken into consideration during the refitting, according to the operations manager. The material from which Starclean scrapers are made \u2013 polyurethane for the primary scraper and a combination of polyurethane and carbide for the secondary scraper \u2013 is very important. Together with the right contact pressure, this guarantees consistently good cleaning results. The average service life of the blades is at least two years, after which they must be replaced. <\/span><\/p>\n

\u201cThe investment has paid off for us\u201d, says Kolhagen. The new scrapers have proven their worth, cleaning quality is good and fulfils expectations. Blades can be easily replaced without any tools and since their service life is relatively high, there is less work for the fitters. There has been an overall decrease in maintenance and servicing needs and the whole plant\u2019s process reliability has increased. But the advantages cannot be measured solely in financial terms: \u201cThere have been improvements all round\u201d, according to Kolhagen.<\/span><\/p>\n

Further information\/Weitere Informationen:
\nF. E. Schulte Strathaus GmbH & Co. KG
\nwww.schulte-strathaus.de<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Replacing scrapers on a conveyor belt system is almost always a lengthy process for any company. 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