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《Express Information of Mining Industry》 2003-01
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Study and Application of Tungalloy White Cast Iron Liner

Fan Dingsheng (Xiangtan Iron & Steel Group Co.)  
A ball mill is an important device to process ore powder.A liner is a key part in the ball mill and its wear resistance has a direct effect on the efficiency of the ball mill and grinding cost of the powder.Conventional high manganese steel liner has poor process hardening effect,low wear resistance,short service life and high changing rate.Our country is rich in tungsten resources.Taking tungsten as the main alloy element,tungalloy white cast iron liner is developed.The cast iron of high fragileness is fragile if it is used to manufacture liner.Influence of alkali metal element K and Na on structure and performance of the cast iron is studied.The results show that eutectic carbide changed from net distribution to fractured net state and ball state distribution after the cast iron was metamorphosed using K and Na.Carbide is clearly thinned and the distribution is even.Improvement of the carbide state results in clear enhancement of impact toughness and impact resistant wear performance of the cast iron.The metamorphosed tungalloy white cast iron liner is used to grind ore powder in the ball mill.The cast iron liner is safe and reliable in the production and its service life is above 3 times longer than the high manganese steel liner.
【CateGory Index】: TD453
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