[Stoves] Stoves Digest, Vol 6, Issue 60

[Crispin Pemberton-Pigott]

Dear Jeff

>You have the best mixer I've have seen to date!

Garsh!  I have a fan!

That's the last 'fan' pun for a while (promise)!

The mixer is almost impossible to make without a plasma cutter so I can't 
say 'do this at home' and I can hardly ship them 10 feet because they are so 
bulky but it does work and will work for your ball milling.  My thumbsuck is 
that you would be able to make about 40-50 batches a day, but I think in the 
long run you will find a longer mill time being required.  I am surprised 
how quick your batch is processed.  Perhaps it is the soaking.

If you remember when we first talked about making balls there were a couple 
of messages about using a drum or 1/2 a drum.  If you can get the angle 
right you could use that because the wearing of the drum is so slight.

I was thinking of setting one angle for ball milling and then a second one 
(into which the first could dump) at a different angle for agglomerating the 
balls.

Made from 1/2 drums and turned by hand you need one whole drum, some cutting 
and some welding.

I read with great interest your reference to low emission coal+limestone 
briquettes.  There is a Canadian patent on injecting calcium hydroxide into 
the boiler flames where it is just about 1160 degrees and it removes 
something like 90% of emissions (except for CO2 of course).  The briquetting 
idea seems to use the same principle with lime.

The US coal stations BTW are refusing to use the technology because it was 
really cheap and they had successfully argued that the reduction of S02 and 
NOx (etc) was extremely expensive so the law was left such that they didn't 
have to clean up their emissions, 'because it would increase the energy 
price'.

It is possible that places like South Africa which use a lot of coal in 
households could use the briquetting and roasting idea to introduce 
low-smoke coal products.

Regards
Crispin