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Analysis and Countermeasures of Crack Causes on End Covers of DTM 350/600Tube Mills 

PAN Zhi-yun  
There are 'eight DTM 350/600 type tube mills installed in the anthracite-fired power plants of Fujian Province.On the end covers of these mills crackings occurred successively and expanded gradually, resulting is bearing burnt-out,thus seriously affecting tile wale production of power plant. For this, Fujian Provincial Elecrtic Power Bureau organizedtask force to carry cul special topics study and adopted the modified end covers, which have been used for more than 4years, since being put into operation,without any crack found.
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