Metal Recovery From Slag

Hi,

I am working on the project of recovering metal from slag generated while melting the metal.

The slag is non metalic material floting on liquid metal while melt refining. There are metal content in this slag which is just thrown now or the lumps are used as landfill while making road.

The purpose is to recover the metal within this slag/lumps. Those metal which are expensive can be recovered in metal form it self and the same recovered metal will be used in next heat/melt. This recovery is absolutly free.

Can any one help me on this subject or share their views.

Dhiren Gandhi