Shanghai wanan enterprise corporation cement grinding system USES 3 sets of grinding machine, including Φ 3.2 m x 13 m ball mill supporting HFCG1200-450 rolling machine, 2 sets Φ 2.4 m x 13 m ball mill share a CLF140-65 rolling machine. The basic principle of Shanghai wan 'an enterprise head office production is to sell the production, that is, according to the actual sales situation to arrange production, the annual roll press operating rate of about 70%, in this case, HFCG1200*450 roll press use one year, clf140-65 roll press use half a year, roll wear layer basic wear out. Later, ZD series flux-cored wire developed and produced by zhengzhou institute of machinery was used to repair the wear resistance of the roller surface.