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Crispin,<br>
<br>
Interesting about that coal. You say:
<blockquote type="cite">The dark stuff is nearly burned out coke and
the white material is fully burned out stone</blockquote>
When the carbon is burned out, is the stove porous? Heavier than
pumice? Useful as low density inert material?<br>
<br>
Paul<br>
<pre class="moz-signature" cols="72">Doc / Dr TLUD / Prof. Paul S. Anderson, PhD
Email: <a class="moz-txt-link-abbreviated" href="mailto:psanders@ilstu.edu">psanders@ilstu.edu</a>
Skype: paultlud Phone: +1-309-452-7072
Website: <a class="moz-txt-link-abbreviated" href="http://www.drtlud.com">www.drtlud.com</a></pre>
<div class="moz-cite-prefix">On 10/6/2016 11:03 PM, Crispin
Pemberton-Pigott wrote:<br>
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cite="mid:COL402-EAS1711979D54A5D7186EF2366B1C60@phx.gbl"
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<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US">Dear
Nikhil<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif">“</span>Crispin:
Is it any surprise that the mine doesn't wash or
grade a high energy, high-vol coal for small retail
sales? What incentive would you consider for it to
do so?”<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Good question. I asked and found
that they used to do both when it was part of the
Soviet Union.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I think they either lost the
equipment (breakdown) or it cost something to run
and the customers had no say about it. The main
issue is there is so much stone in the product it
greatly interferes with certain combustors types. <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Here is what I pulled out of a TJ
Model 1 with a grate modified for coal burning:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><img
style="width:4.9791in;height:5.9375in"
id="Picture_x0020_1"
src="cid:part1.CCA41B3D.5939779E@ilstu.edu"
height="570" width="478"><o:p></o:p></p>
<p class="MsoNormal">The dark stuff is nearly burned
out coke and the white material is fully burned out
stones. <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">A great deal of what remains
inside is stony. I suspect there are places in the
mine with a far high grade and a lot less stone
content, but this is the junk the really poor people
burn.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">It happens to be high grade – the
part that actually burns and the energy content is
impressive – double that of the Nalaikh coal in
Ulaanbaatar. So people say it burns for a long time
and I agree. This stuff was a complete failure in a
TLUD. I will try again with small chips and run it
as a packed bed gasifier in case that works, but not
in the 20-40mm size. No chance.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">If they washed it (which involves
floating it on a dense liquid) it would remove the
bits that ae just ‘stones’ but it would change the
price because they would have to keep all the junk
they sell now. <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The fact is there are different
quality products in the market and they have
different prices. Basically you get what you pay for
but the imported Kyrgyz coal is a far better buy in
terms of cost per MJ. It turns out the Kyrgyz coal
has no national market in that country because it is
so far through the mountains they can’t get it out
to the north – so it is sold across the border to
the south.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Sizing is a different matter –
anyone with a shovel and screen can do that and they
are willing to sort it at the retail point. <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Here is a typical operation:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><img
style="width:5.0729in;height:5.052in"
id="Picture_x0020_2"
src="cid:part2.710B6E3D.C09C22D6@ilstu.edu"
height="485" width="487"><o:p></o:p></p>
<p class="MsoNormal">They sell an 80mm, 40mm and a
12mm. The duff is sold to the power station for
about 1.3 cents per kg.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The quality of what is in the
picture is quite good. The bad stuff is from Aini
Mine. (‘Aye-knee’ Mine)/<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Regards<o:p></o:p></p>
<p class="MsoNormal">Crispin<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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