Yes, Oh Dear. Looks like you've spent your time researching...

Yes, Oh Dear.
Looks like you've spent your time researching prices and being up to date with RE daily prices but forgot to read all the relevant company announcements.

MAY NOT be able to return it to pit due to waste composition ? You are clutching at straws again goofy.
NTU can dispose of the waste back in the pit because the plant built at Browns range is a concentrator and waste composition is the same as ore mined from the pit minus the concentrated RE containing ore. The concentrated product is then shipped to China for further processing into DyO. This is all there in the announcements.

Lynas has a similar setup at Mt Weld and have no issues disposing of it waste left after concentrating the ore but then it sends the concentrated ore to Malaysia for further processing at LAMP. It is the radioactive waste from LAMP that Lynas is having issues with disposing and since they were denied permission to bring it back to Mt Weld they were supposed to find a site and build a storage facility in Malaysia.
As for the chemical composition of the waste from LAMP there are a couple of very informative posts on Stop Lynas Save Malaysia site that got posted there this week. One of the posts gives the chemical composition of the waste and Total Activity concentration of Th-232 and U-238 decay chains if you're interested in such details, the other gives a recap on LAMP and missing PDF.

The posts were a bit long to copy here but you can find both posts at http://savemalaysia-stoplynas.blogspot.com.au/

Looking forward to your comments after you read it.