<html><head></head><body lang="en-US" style="background-color: rgb(255, 255, 255); line-height: initial;"> <div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif, sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);">Dear Julien</div><div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif, sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);"><span style="font-size: initial; line-height: initial; text-align: initial; font-family: Calibri, 'Slate Pro', sans-serif, sans-serif;"><br></span></div><div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif, sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);"><span style="font-size: initial; line-height: initial; text-align: initial; font-family: Calibri, 'Slate Pro', sans-serif, sans-serif;">Quite reasonable plan. You could use peas or beans as a filler too. </span></div><div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif, sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);"><span style="font-size: initial; line-height: initial; text-align: initial; font-family: Calibri, 'Slate Pro', sans-serif, sans-serif;"><br></span></div><div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif, sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);"><span style="font-size: initial; line-height: initial; text-align: initial; font-family: Calibri, 'Slate Pro', sans-serif, sans-serif;">Warning : you must not raise the temperature rapidly. If you know there is a significant biomass content you have to ramp slowly. Else it will spall. </span></div><div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif, sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);"><span style="font-size: initial; line-height: initial; text-align: initial; font-family: Calibri, 'Slate Pro', sans-serif, sans-serif;"><br></span></div><div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif, sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);"><span style="font-size: initial; line-height: initial; text-align: initial; font-family: Calibri, 'Slate Pro', sans-serif, sans-serif;">Ramp to 120C and hold for at least an hour. Ramp at 130 deg per hr to 600 and home for at least an hour. Then ramp at 250 per hr to final, hold for 30 minutes. </span></div><div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif, sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);"><span style="font-size: initial; line-height: initial; text-align: initial; font-family: Calibri, 'Slate Pro', sans-serif, sans-serif;"><br></span></div><div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif, sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);"><span style="font-size: initial; line-height: initial; text-align: initial; font-family: Calibri, 'Slate Pro', sans-serif, sans-serif;">Then you can cool it at maybe 200 per hour, it depends on its thermal shock resistance. </span></div><div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif, sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);"><span style="font-size: initial; line-height: initial; text-align: initial; font-family: Calibri, 'Slate Pro', sans-serif, sans-serif;"><br></span></div><div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif, sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);"><span style="font-size: initial; line-height: initial; text-align: initial; font-family: Calibri, 'Slate Pro', sans-serif, sans-serif;">If it is really good, throw it hot into water and see if it survives. If it is good it will survive five such immersions. </span></div><div>Really good ceramic can survive 1000 C into water repeatedly. </div><div><br></div><div>Regards </div><div>Crispin </div><div><br></div><div><br></div><div><br><div id="_originalContent" style=""><div dir="ltr"><div><div><div><div><div>Hi Crispin;<br><br></div>Thanks for all the advice.<br><br></div>I have a small test of concept project in the works to see if I can get a porous, radiant burner to work on a natural draft TLUD. <br><br>I not optimistic, but if one doesn't try one doesn't know. The problem will be sufficient mixing of gas and air before they enter the ceramic foam disk, and low gas pressured to drive the system.<br><br></div>Because the gas pressure will be low, the open cell structure in the ceramic foam will have to be coarse. To do that, I am making a fugitive template from soybean seeds stuck together with tapioca starch. The slip is a commercial porcelain clay. For a coarser template, I am using maraschino cherries!! They will be fired to ca. 1200 °C.<br><br></div><div>I think this will be a recipe for smoke, and the burner may disintegrate after a few moments. But at least I will see what happens.<br></div><div><br></div>Cheers,<br></div>Julien.<br clear="all"><div><div><div><div><div><div><br>-- <br><div class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr">Julien Winter<br>Cobourg, ON, CANADA<br></div></div></div></div></div></div>
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