Not really AIM for profit - clouds aren't only a certain size and variations in wind intensity vary over many timescales. Flow batteries can be used over timescales from sub millisecond to peak shifting over multiple hours.
Sure you could say what if I have a puff of wind and then none for a minute and then another gust of wind surely I'm only using a tiny fraction of my multiple hour long energy storage capacity. But the point is that that behaviour happens many many times a day and it may well be that the amount of energy that you take out on the downtime is less than you put in when the wind was blowing hard - thus the battery does not return to the original state - you actually progressively charge up the battery, and if you don't have multiple hours total capacity you can only do this for a few hours until suddenly you have completely charged the battery up and you are then stuck.
I mean sure if you want to fully charge and discharge a Lithium-ion battery 100 times a day fine be my guest but don't get annoyed when you discover the battery dies after one month.
martyboy - I am afraid that you are wrong there martyboy Golden summit had 54.7M on the 30th November and then do not appear on the register on the 31st of December. This would have taken them past both the 4% and 3% notification thresholds, none of which was ever received.
hargreaves Lansdown has instead gone fro 129.8M on the 30th Nov to 187M on the 31st December - so it looks more than likely that Golden Summit has simply been reclassified under the HL platform umbrella
JonesyUK - even they have no idea yet as they haven't got anywhere near defining a resource. It takes years to do this, and then they need to get a mining license once a full mine plan has been developed and agreed with the local governments.
One thing I do know and that is there are no Vanadium mines in Finland, or anywhere inside the arctic circle for that matter.
Ophidian - I did wonder that - to summarise the typical "mass recovery rates" are 5%, V2O5 in magnetite 2.5% and V2O5 in whole rock 0.4%.
If the "mass recovery rate" was the amount of stuff they got from the davis tube process then that suggests that there is typically 5% magnetite in the rock.
However if that was the case and all the V2O5 was in the magnetite then the V2O5 in magnetite fraction should be 20x that for the whole rock. If you could extract the magnetic fraction you would get 0.4 Tonnes of V2O5 out of every 100 Tonnes of ore.
Okay what if there is V2O5 in both magnetic and non-magnetic fraction ? 2.5% conc in the 5% magnetic fraction and 0.29% in the 95% non-magnetic fraction. In this case the magnetic fraction contains only 30% of the total V2O5. So you dig up 100 tonnes of ore and may only get 0.4 x 30% = 0.12 Tonnes of V2O5 as a result.
Let's consider the case where the mass recovery rate is just a poor reflection of a very inefficient magnetic extraction and the real magnetic fraction is around 1.6th (18% as compared with the 5% quoted for the mass recovery rate.) Thus 2.5% of 18% works out the same as 0.4% of 100% - i.e. all the V2O5 might be in the magnetite. A perfect magnetic separation still only gives you 0.4 Tonnes of V2O5 for every 100 Tonnes of ore dug up and crushed.
The conclusion ? There is little point in having high concentration of the stuff you want if the total amount ends up still being bugger all.
Tyfoon - I must confess I agree about Twitter I have picked up a lot of useful information and connections from it in the last year - and @BMNperspective now has over 700 followers, up over 300% in the year.
Tyfoon - there was a twitter discussion on this subject at the end of last week. I believe that it was AVL that pointed out that the proposed mass recovery of the Pursuit ore is less than 10%. I looked at their figures and could not understand why mass recovery was being quoted for what was not an analysis of a process, but purely of a rock core. Perhaps Ophidian could have a look at this discussion on Twitter:- https://twitter.com/BMNperspective/status/1083318907925155841 and this report:- https://www.asx.com.au/asxpdf/20190109/pdf/441rjyhshby5nn.pdf
Redleader - Vametco does not produce FerroVanadium, but instead the better Nitrovan (Vanadium+Nitrogen). You cannot simply just go ahead and make mixed acid electrolyte because you feel like it, there is the PNNL patent on that stuff which only 3 companies have a license for. Fortunately the inventors of the mixed acid electrolyte (gary Yang et al) founded UET and are the main licensee of the mixed acids electrolyte.
hotchips et al - you are right the guardian article completely missed the point. The people who have not missed the point are BEIS and so if this movement holds it is quite possible that it was triggered by that news.