Abstract: The characteristics of long distance and high intensity transportation with pipes of iron tailings was analyzed, through research on its physical characteristics and parameters of pipe transportation, for issues of security and stability with long distance and high intensity transportation of iron tailings, Meishan. An economic and security intensity and velocity was proposed and verified by pipe transport test, based on the Meishan iron tailing slurry pipe transport mathematical model fixed by function of critical velocity found by sediment institute Tsinghua University. 　　

Key words: Iron tailings, Piping with high intensity tailing slurry, Critical velocity