253 replies to this topic

[marble]

Exactely what MDH said.I only used a mortar and a pestle.But because of my failiures of making a ball mill ,I decided to make a manual ball mill:in a half liter botle i placed 20 balls,and in I poured like 50 g of black powder.And I shaked it like 5-10 min and the powder i got out was as fast as the one made whit a mortar and pestle.

You effectively shook a pipe b**b filled with ball bearings

[TzaRocket]

I guess your right,tought that I have benn doing it lie this for a long time and nothing happend.But i guess that it could hapen anytime so i will work again to make a ball mill.

[Stew]

I have milled up some bp but its VERY slow and seems to leave behind globules of what looks like sulphur. Any ideas?

[Pyromaster2003]

If all your chems are decent purity its mostly likely you mill not milling the chemicals together enough. When you pinch a bit of it and rub it between you thumb and finger, does it feal gritty? It should be as smooth a talc powder/icing sugar and should not have any bits of 'grit' in it. What mill and media you using?

[Stew]

Yeh i've put it back in the mill for another stretch of time. It didn't seem fine enough, but just making sure this was probably the only cause? I bought a mill off the internet and using lead balls about 1/2-3/4 inch diameter.

[Pyromaster2003]

Give it a good milling until theres no gritty bits and it will be better. Obv the longer you mill the better. In my mill i can mill 100g in an hour and its very fast, just flashes in a whoomph. Other mills will be different depends on how fast the jars turning, how much powder your milling and how many lead balls you have in the jar. good luck

[MDH]

That and make sure your perportions are right. Too little charcoal can leave large amounts of potassium nitrate residuals.

Edited by MDH, 27 September 2007 - 07:58 PM.

[marble]

Damn fuse turned my simple test into a out of control wheel, and thats only the thin Chinese visco!



Thats better, pulverone here we come. Not bad for 2 hours of ball milling.

[Bonny]

Damn fuse turned my simple test into a out of control wheel, and thats only the thin Chinese visco!



Thats better, pulverone here we come. Not bad for 2 hours of ball milling.

You might have stumbled upon an easy way to make a small wheel though

[MDH]

Hello,

I have a question.

Would it be viable to replace the sulphur with sugar in order to simultaneously produce more gases and bind a lift powder without slowing it down too significantly?

[littlejohny]

Hello,

I have a question.

Would it be viable to replace the sulphur with sugar in order to simultaneously produce more gases and bind a lift powder without slowing it down too significantly?

Stick with the tried and true, sugar would also make the BP hydroscopic.

[pyromaniac303]

Stick with the tried and true, sugar would also make the BP hydroscopic.

Sugar is not as sensitive to ignition as sulfur, so would increase the ignition temperature, and as it would burn with a lower temperature (I think) would burn slightly slower. As BP is safe enough to handle anyway I dont think theres much of a need for it. I don't know how it would affect the gas production though, might be worth doing some testing.

[Mumbles]

Gram for gram, sucrose(or all sugars) produces about 3x the gas per gram that sulfur does including water vapor. Counting gases at room temp, sugars slightly edge out sulfur, but not much. The increased gas production also carries with it, increased oxygen demand however.

[MDH]

So if I was to do as such I'd be better off adding a small percentage of a sulphate or a perchlorate?

See, the thing is here, I don't want to go too astray from black powder so I'm not using my precious limited resources of other chemicals.