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Share Name Share Symbol Market Type Share ISIN Share Description
Rainbow Rare Earths Limited LSE:RBW London Ordinary Share GG00BD59ZW98 ORD NPV
  Price Change % Change Share Price Bid Price Offer Price High Price Low Price Open Price Shares Traded Last Trade
  -0.10 -0.72% 13.75 13.50 14.00 13.75 13.75 13.75 319,636 08:00:09
Industry Sector Turnover (m) Profit (m) EPS - Basic PE Ratio Market Cap (m)
Mining 0.4 -2.2 -0.6 - 65

Rainbow Rare Earths Share Discussion Threads

Showing 2351 to 2372 of 3000 messages
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DateSubjectAuthorDiscuss
06/11/2020
23:52
5. Summary and OutlookThe exploitation of REE?bearing phosphogypsum, a by?product of the fertilizer industry, is a promising concept for an economical production of REEs. In the presented project, the REE content was concentrated by physical methods prior to chemical processing to extract the REEs, a prerequisite for a competitive process. This paper focused on the development of a hydrometallurgical process for the production of a mixed?REE carbonate from the REO concentrate under the special consideration of safe thorium handling.In preliminary tests, the sulfuric acid and the caustic soda digestion were tested. The digestion with sulfuric acid showed superior results with regard to impurity immobilization at similar REE yields. Therefore, this route was investigated in detail, supported by DoE. The obtained data were used to optimize the digestion parameters towards maximum REE yields and minimum thorium mobilization. The highest REE extraction (?90%) was achieved at 275 °C for 4.3 h with a ratio of concentrated sulfuric acid to REO of 6.0 g/g, accompanied by high thorium mobilization (?70%). The DoE also revealed that low thorium yields can be achieved at temperatures above 400 °C, depending on the ratio of sulfuric acid to REO. However, at this temperature range, REE yields are expected to Remaining concentration in solution in %Metals 2020, 10, 131 21 of 23decrease by about 10%. For the current concentrate quality, the ratio of sulfuric acid to REO is comparatively high. However, it is expected that the quality of the concentrate will increase in the future and the required ratio decrease.Based on these results, it was investigated, whether a two?stage digestion could lead to a better compromise between REE extraction and impurity control with the first stage at low temperature (275 °C for 4.3 h) and a second stage at high temperature (400–500 °C for 1–2 h). The experiments revealed that the two?stage approach enables a complete immobilization of thorium and phosphorus in the leach residues. The REE yields seemed to be slightly higher in comparison to a single?stage high temperature digestion. Nevertheless, the yields deteriorated around 5–10% compared to the single?stage digestion at low temperature. Regarding baking time, the experiments showed that although a total time of about 5 h is necessary, the immobilization of thorium and phosphorus requires only a comparatively short period of 1 h at high temperature. The overall baking time is in line with industrial processes.The leach solution of the two?stage digestion showed a very low impurity profile. Traces of aluminum, iron, and phosphorus can be precipitated with an ammonium solution at pH 5. Only alkaline earth metals remain in the solution with the REEs. In comparison, the leach solution of a single?stage low temperature digestion showed a much higher impurity content. The precipitation experiments showed significant co?precipitation of the REEs with phosphorus. These losses outweigh the higher yields during digestion and leaching by far.After purification, the REEs can be precipitated as carbonates. As expected, the main impurities were calcium (1.16%) and strontium (0.26%); other impurities were only present in trace quantities (
oapknob1
06/11/2020
23:40
Extraction of Rare Earth Elements from Phospho? Gypsum: Concentrate Digestion, Leaching,and PurificationLisa Brückner 1,*, Tobias Elwert 2 and Thomas Schirmer
oapknob1
06/11/2020
22:18
It's certainly no job for a geologist, but a huge challenge for a chemical engineer: How do you extract rare-earth sulfates from 170 times their mass of calcium sulfate (gypsum), lying in a tremendous heap, without consuming enormous quantities of acids and alkalis in a gigantic plant and leaving behind an even greater quantity of material that is more environmentally harmful than gypsum?
meanreverter
06/11/2020
22:06
Bet it's gonna be a nice Christmas in his house though. Be an even better one next year.
oapknob1
06/11/2020
20:50
Not exactly small either - over £40k, a third of his holding. As chief geologist maybe he feels peeved by the interest in a couple of stacks of tailings... lol
swanvesta
06/11/2020
18:49
Thats a bit smelly..........Director sells a load......RNS after close on a Friday. Mmmmmmmmmmmmmm https://uk.advfn.com/stock-market/london/rainbow-rare-earths-RBW/share-news/Rainbow-Rare-Earths-Limited-PDMR-Dealing/83626997 .
pro_s2009
05/11/2020
12:42
Looking optimistic from here.
matt123d
05/11/2020
10:55
Profit taking. Normal unless a new investor gets stuck in.
napoleon 14th
04/11/2020
17:39
9p by Friday or is that too optimistic...
magicmayhem
04/11/2020
14:29
Exactly what I was looking at. Will be a few people targeting that area now.
matt123d
04/11/2020
14:27
Just looked at the historical chart, there is a gap still yet to be filled around the 9p area, never got completely filled on the last spike but this move has some more fundamental substance behind it so I would expect the next logical target to be around 10p, all imho, nai.
devonlad
04/11/2020
14:16
Should see 9-10p on this move.
matt123d
04/11/2020
14:15
iPhones use RE elements. Keep buying them?
pwooly
04/11/2020
13:53
Or "Sit on your bum"! & IMO coin codes really means coincides. Good thing it didn't have to spell Phalaborwa.... Anyway, laughs apart, a good read. I just Googled it.
napoleon 14th
04/11/2020
13:52
Does look like a very good deal on paper, I wonder if they have the rights to sell on the benign gypsum, that would be worth a few quid as well! Seems like a very long wait has finally paid off, happy to hold for further news.
devonlad
04/11/2020
12:38
Set to become (stupid iPhone)
timnicebutdim
04/11/2020
12:38
Proactive investors just issued an article on RBW headed "Rainbow Rare Earths set your become one of the world's largest producers of neodymium and praseodymium following latest deal"!issued at 11.31 which coin codes with the uptick in price
timnicebutdim
04/11/2020
10:50
Starting to turn now, added a few more.
matt123d
03/11/2020
20:06
That 450k was me trimming some down.
matt123d
03/11/2020
15:25
Won't complain - high time we got somewhere with RBW... However, I bought at 9p average in 2017 on the strength of what is still above: "Indicative forecasts: 5000t/a initial production capability, ~ $10k/t basket price, concentrate discounted to Thyssenkrupp over 10 year deal, $810/t op costs, $280/t transport costs." What happened to all that??? Anyway, it indicates RBW are being taken seriously at last! I waited 13 years for GGP to take off, but no longer view things on the same time scale...Pouroulis would tell you "that's the nature of mining" CAML holders will know why I say this looks like a copy of Kounrad... Hope it pays as well.
napoleon 14th
03/11/2020
13:43
I read somewhere they are forecasting $150 per Kilo for ND/PR as the Economy is forecast to be green recovery after C19, so a large demand for ND/pR. But then I read a lot of things and they never come true.
timnicebutdim
03/11/2020
13:18
I have sent an email to Rainbow and will let you know what they say
odsjp
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