196 replies to this topic

[icarus]

if you can consistently produce bp of same burning speed even if it is slow rejoice youve just made marvelous rocket fuel !!!

[marble]

no i don't have a press, or the tools to build one.

All you need is a drill and a saw, buy a car jack and some pine from the hardware store along with a few bolts.

[marble]

Just tested my 45 minute powder, took 0.5 seconds to burn 50cm so thats exactly 1 meter a second. Thats fast enough for everything pyro

http://www.creagan.n...coal_tests.html

Good speed reference for diffrent charcoal types, might try a 12 hour batch

Edited by marble, 01 December 2007 - 12:22 PM.

[Zinginex]

When wetting meal powder, if you dont have hold of any ethanol or alcohol, could deodorant be used as a substitute? Or would then not be much difference wetting it with water than deodorant?
Thanks

[Bonny]

When wetting meal powder, if you dont have hold of any ethanol or alcohol, could deodorant be used as a substitute? Or would then not be much difference wetting it with water than deodorant?
Thanks

You serious??
Just use plain water.

[MDH]

Just tested my 45 minute powder, took 0.5 seconds to burn 50cm so thats exactly 1 meter a second. Thats fast enough for everything pyro

http://www.creagan.n...coal_tests.html

Good speed reference for diffrent charcoal types, might try a 12 hour batch

... I want your mill.

[Pyrogeorge]

how many hours need to make black powder with ball mill??also it is better to grind the 3 chemicals separate to make powders and then to grind all together for the final result

[portfire]

how many hours need to make black powder with ball mill??also it is better to grind the 3 chemicals separate to make powders and then to grind all together for the final result

It depends on the efficiency of your mill and other factors like over loading the jar..Read the ballmill thread!!!!

What i do is mill my KNO₃ for 2 hour, weigh the chems, put them in a sieve (over a sheet of paper) and mix them while pushing through the sieve. This breaks up any lumps, do this a couple of times so you have a uniform mix then place this mix into the mill jar...I find milling smaller batches to be more efficiencient.

Dean

[Pyrogeorge]

when you mill the kno3 the result is fine powder or not?

[portfire]

when you mill the kno3 the result is fine powder or not?

Yes. KNO₃ does clump together, and i find milling it shortens the milling time .Sulphur also clumps together, but i just sieve that to break the bigger bits up..You could just stick all the chems in the jar as they come and let the mill do it's work, although it's best your charcoal be as fine as posible. It's all down to person preference..Experiment,and whichever way suites you, stick with it.

Edited by portfire, 05 April 2008 - 07:18 PM.

[Pyrogeorge]

if it possible post an image with kno3 after milling to see how it looks like because i have rock tumbler to compare the final result..

Edited by pipipi, 05 April 2008 - 07:27 PM.

[portfire]

if it possible post an image with kno3 after milling to see how it looks like because i have rock tumbler to compare the final result..

Well, it basically looks like flour, maybe slightly courser

[cooperman435]

I've never seen the point to seperate milling or even mixing the components when using a ball mill. I add course kno3, sulphur chips, charcoal that passes 10# and lumps of dextrin one at a time into the jar, dump in the media and mill it from there. 30secs after turning on the mill it's all mixed perfectly anyway.

[phildunford]

I agree with Phill...

I have seen advice to mill the KNO3 on it's own, as it is safer, but sooner or later you have to put it all together.

I just dump sulphur, KNO3 and rough charcoal thats been put though a mincer (probably all the way from 5 mesh to airfloat) into the jar and press the go button.

I really don't care if it takes 2 hours or 12 hours. I usually turn the mill on in the evening and take the powder out next morning - it always seems fine (in both senses!) and this method saves alot of work.

You have to be careful not to let any rubbish that could cause sparks get into the mill, but normal,clean working practices should ensure this. Also it is sensible to put your mill somewhere where it would not matter if it went bang - 1/2 a kilo of powder surrounded by lead balls and all confined in a nice tight jar would make quite a mess I think!

[starseeker]

I agree with Phill...

I have seen advice to mill the KNO3 on it's own, as it is safer, but sooner or later you have to put it all together.

I just dump sulphur, KNO3 and rough charcoal thats been put though a mincer (probably all the way from 5 mesh to airfloat) into the jar and press the go button.

I really don't care if it takes 2 hours or 12 hours. I usually turn the mill on in the evening and take the powder out next morning - it always seems fine (in both senses!) and this method saves alot of work.

You have to be careful not to let any rubbish that could cause sparks get into the mill, but normal,clean working practices should ensure this. Also it is sensible to put your mill somewhere where it would not matter if it went bang - 1/2 a kilo of powder surrounded by lead balls and all confined in a nice tight jar would make quite a mess I think!

Due to possibility of the above happening, (would not want to wake the neighbours } i mill the charcoal and sulphur together then use the CIA method to add the kno3,and this gives me decent powder.
regards.