Target temperature: 600 deg.
I have tried ramping the furnace @ 10 deg/min using fine sieved sludge ( size < 300 microns) in a porcelain crucible but they sludge layer on top gets calcined but as i go deeper , the layers turn blackish in colour and bottom layers show original sludge colour with no effect of heat. Can anyone pls guide how can i get uniform calcination and not inconsistent like this?
Thanks
Curtis Guild
Hey you are right....currently i am doing the same. coating the inside of the crucible with thin layer of sludge for batch processing. this is giving me consistent calcination but i have to perform many batches before i can reach my desired quantity. Wanted some way to do the process faster but in the correct manner . Thanks a lot Curtis for providing me insight. Best wishes
If the same process done in alumina boat in tubular furnace then how coating can be done?? As I'm using tubular furnace for pyrolysizing sludge crucible cannot be placed inside furnace...
Mohanapriya Velumani could you describe more as to what you want and what issues you are facing? you want to pyrolyze the sludge using alumina boat.....did i get you right? u can even go for alumina jar with a alumina lid and pack your material in a way that it prevent direct contact with air. you can add chipped tiles as chips for stacking or maybe sand. basically avoiding direct air contact with your material.
Yes I want to pyrolyze my sludge using alumina boat in tubular furnace... how coating of sludge can be done in alumina boat ?? As I also face the problem like only the top layer gets calcined and turns to black color whereas the bottom layer remains in the same color of sludge
Mohanapriya Velumani try with a thin layer of sludge hardly 1-2 mm thick, spread it evenly and see but they should not be exposed to air take care about that
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