Pretty much anything that needs to come out of the ground in a form far less concentrated (aka "ore") than the form in which it is useful is economically recycl

Pretty much anything that needs to come out of the ground in a form far less concentrated (aka "ore") than the form in which it is useful is economically recyclable because the product provides a more concentrated source of raw material for making into new things than the natural deposits in the earth do. That's basically a long winded way of saying most metals are cheaper to recycle than to mine new.