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operation and maintenance of crusher house keywords india coal grades crusher construction crushing stages defect identification introduction the coal handling plant chp in a thermal power station covers unloading of coal its crushing storage and filling of boiler bunkers coal unloaded in the wagon tippler hoppers track hoppers is conveyed to crusher house

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day of disaster scholastic day after day miners blasted through rock with dynamite they cut out the coal with heavy tools their backs aching they shoveled the coal into cars that looked like giant metal buckets then they used mules to pull the coal cars along metal trackslike the tracks on a roller coasterto an air shaft

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rock crusher history mineral processing metallurgy the gyratory principle was the basis of several rudimentary designs patented between 1860 and 1878 none of which embodied practical mechanical details at least not in the light of our presentday knowledge of the art then in 1881 philetus w gates was granted a patent on a machine which included in its design all of the essential features of the modern gyratory crusher

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