Received the shipment of Alaska bit from Short Bus today and it is a whole different animal than the Wyoming bit.
The sizing of the Alaska bit is perfect. It is shown side by side with anthracite rice.
The Alaska bit ash and clinker is identical to anthracite, shown side by side.
This video shows the start up of the fire. Note the blue flame, not seen with the Wyoming bit.http://www.youtube.com/watch?v=yyfUaOA1S8s
This video shows the established fire with a feed rate of 11 and air of 4-5.http://www.youtube.com/watch?v=SpsneZjADZ4
This video shows the fire restarted after a 45 minute shutdown.http://www.youtube.com/watch?v=1JxDzrAt4b0
This video shows the smoke produced at rest. http://www.youtube.com/watch?v=NgVLS1JXZ34
I'll burn the rest of the coal on Monday.
From what I saw today, the ash clinker is identical to anthracite rice. More than twice the amount of air is needed to burn this coal than the Wyoming coal at the same feed rate, so the fire was hotter and the water warmed much faster. The fire does not go out during extended rest periods. The fire makes NO visible chimney smoke when burning with the fan, similar to anthracite. The sulfur odor is noticeably less than what the Wyoming coal produced. There was never a large hardened clinker in the pot because the fire burns around the edges. I shut the stoker down until Monday with a full pot of ignited coal to see what type of clinker might form. The sparks produced during stoking are less than the Wyoming coal.
There is nothing negative to report about this coal as of now.
I am open to suggestions from bit burners as to what I can do to CAUSE a clinker to form, or any other tips.