Ball mill cast iron manhole covers are mainly made of ball mill cast iron manhole covers,The quality of this manhole cover is related to the spheroidization rate. The commonly used paint to treat castings is rust-proof asphalt paint ,Of course, the surface of the ball mill cast iron manhole cover is also treated with anti-rust asphalt paint. One advantage of the ball cast iron manhole cover is that because of the high strength and good toughness of the ball cast iron, the ball cast iron manhole cover is lighter than the same type of gray cast iron manhole cover .Ball mill cast iron manhole covers have the following characteristics  1.high toughness   2. strong corrosion 3.Good plasticity  4.high intensity Ball mill cast iron manhole covers are widely used. Municipal roads, highways, communications, electric power communities, schools, etc.

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