Nothing is recycled properly. Recycling was a story told to ease consumers minds so they keep on consuming. The stuff you throw away ends up on a landfill, in the sea, or on a ship to someplace else where it gets burned and then buried. Sending it to space makes absolutely no difference.
Most steel and aluminum and nearly all copper is recycled
How do you know?
It would be relatively obvious from the difference between production and mining output.