Hello, and welcome to the forum.
I know you waited awhile to make your first post, but I am afraid that may be too vague of a question for anyone to yield a proper answer that can help you.
I hope I am wrong, but I think the professionals and one's with experience may need to know more information.
Just some more small details really, such as, how are they depopulated? Are they treated in any other way firstly, like pyrolized, incinerated, ball milled, hammer milled, grinded, sieved, etc...
Maybe with some more knowledge on your setup, everyone can help get you on your way to getting all of those precious metals.
I dont mean for that to sound rude.
I saw you are from Egypt, and I completely understand that a language barrier can make a person want to have their message short and sweet.