According to this report about 20% of waste is produced per unit...

According to this report about 20% of waste is produced per unit of REE extracted. Does this sound high ?
May be OMG can give us some ideas.

http://www.microsofttranslator.com/BV.aspx?ref=IE8Activity&a=http%3A%2F%2Fwww.nanyang.com%2Fnode%2F503382%3Ftid%3D861
First batch of rare earth products will come out to about 8 tons of waste or road

Storm of rare-earth plant
national
News
2013-01-09


Yisimaibahali test of rare-earth waste, to prove that is not exceeded.

(Kuantan, 8th) Lehners rare-earth plant has extracted nearly 40 tons of rare earth supplies is expected to emit nearly 8 tons of rare-earth waste, made the first scientific experiment, research and development of its commercial value.

Linus Yamin disclosed today, General Manager of public relations, first rare earth products will be released, first weighed about 8 tons of waste, research is currently being conducted, announced results expected within a few weeks.

He said rare earth waste commercialization takes time, must be made of pilot commodity, but also there is a market demand.

He said many people still on rare earths hold misconceptions, believes it has a radiation, initially may not be able to receive rare earth waste products.

He disclosed that they'll take several weeks at least, can work out test products made from rare earth waste.

"Rare earth waste put into commercialization needs step by step, step by step, is not so easy. ”

Linus the factory from the beginning of 2007 for commercialization of the rare earth waste, waste can be made of gypsum, fertilizer and road building materials.