Posted 26 November 2007 - 09:07 AM
well since i started this post a month or two ago, i have made remarkable procress. with ten hours milling time, then ricing/corning and drying i'm getting a burn rate of 105cm/s which i believe is just less than half black powders maximum potential which is said to be reached with about 24 hours milling time. you must realise that the milling does much more than making teh powder fine. after about 3-4 hours the powder will be as fine as it will ever get (airfloat) and the additional milling time is to compress the particles of the different atoms together tighter, making them 'chemically' bound, rather than just 'physically' bound. this means that once the chemical reaction is started, the atoms are already in contact with their reactants, making it a quick and quick spreading reaction/faster burning powder. if you are using a homemade ball mill then your times may vary substantially. i recommend milling about a 200 gram sample, and every two hours take a sample out, and label them. run the mill for up to 30 hours or longer, or until the separate samples no longer differ in speed.
as for the powder clumping when you look in your mill... the mixture shoudl be completely dry when you put it in, and while running it shoudl sound like a constant 'pitter patter' like raindrops on a tin roof. if the powder is clumping or your mill is inproperly loaded, it may sound like groups of clinging, with a silent part of each revolution. it is perfectly normal for teh powder to clump slightly when not moving, as it is soo fine this is in it's nature. once finding the length of milling time with the greatest burn speed, corn with dextrin and water. there is plenty of information to be found on this so don't ask on this thread.
hope i have helped with your questions regarding milling proceedures and such, and that this substantial post of mine has been informative to you all, as i have gained soo much from the joined knowledge of peopel on this forum, and intend to return the favour.