[naturalman1975]

The model I have seen involves a Metal Storm weapon loaded with ferrous rounds being used to more or less pound a minefield. The sheer volume of fire woud virtually guarantee the destruction of every mine in the minefield. Then magnets could be used to recover the ferrous rounds, if that's desirable - for example if the purpose is to recover faming land in a place that was previously a warzone.

[Shooter 2.5]

That system would never be economical for clearing land mines. I think you should sit back and do the math as to how much it would cost to clear a one acre field.

The Metal Storm system was outmoded by 1860's artillery using cannister rounds.