Bound metal deposition technology, also known as metal material extrusion, is similar to FDM (FFF) 3D plastic printing technology.
BMD technology creates a metal part in three clearly defined phases.
Instead of using material in powder form like Direct Metal Laser Sintering (DMLS), in BDM technology the metal is bonded into rods made of casting wax or polymer. This mixture behaves like a thermoplastic material. It can be melted at lower temperatures and extruded through the die layer by layer. In this way, a metal-polymer object is created - known as the "green part". After 3D printing, this part requires additional processes. The binding part is washed or separated and then sintered in a furnace. This process glues the material together making a finished metal part.
You can see how Bound metal deposition technology compares with other technologies in the text at the LINK .