First time making BP

[Potassiumchlorate]

Meh, fortune will stand by the brave *touches wood*

[bob]

really it's up to you

but if you use none sparking media a plastic or rubber jar that has a really good lid and it's 20 feet from the nearest flame or spark then I think you have a higher chance of a falling star landing on you then it exploding IMO

it's up to you though nobody is going to make you mill it all together

bob

[yvariro]

Thanks you all for your fast reply!

 

 

 

lol but Actually my milling media are... glass(non sparking ?) marbles xD someone are in clay very,very strong (this is some very old marbles)

and my ball mill is a lortone 3A,i put some elcetrical tape on it for uprade the rpm

 

So i don't want to be injuried and broke my ball ball mill (i buy it expensive),so i will mill the charcoal and sulphur separatly from the KNO3

Edited July 4, 2012 by yvariro

[Seymour]

Especially the unknown clay marbles do seem a bit unknown to me in terms of if they may spark. Some ceramics can spark. I agree with your choice to mill the fuels seperately from the KNO3.

 

There is always a small but existing risk that a ballmill might explode. I would say that with non-sparking media, like brass etc, this risk is like one in a million or so.

 

One in a million may be true, but that is not a risk to be too careless about. If you have somewhere to do it where an explosion would not be too big a deal (a small mill in a large lawn perhaps, or sufficiently barricaded) it could be fine.

 

If you mill inside (your home or your workshop) where an explosion would be much more serious, I do suggest milling two parts, the nitrate, perhaps with a little charcoal or sulfur (5% or so) and the rest of the charcoal and sulfur in the second mill. This process may not be capable of matching the best ball milled stuff (without excessive labour such as endless kneading), it's perfectly usable and fast enough for all applications.

 

Ball milling explosions with supposedly non sparking materials do occur, probably a few a year worldwide. While ball milling three components together with the safest materials is an attractive option, one must keep it in their mind the possibility of it going bang, and taking precautions.

 

For years the powder I had was pretty much 'average', about 8mm/sec in these spollette tests, and I never had any problems with it. I dialed in the confinement needed to get it to perform well (pasted paper layers), and used it efficiently and reliably.

 

My newer stuff is 13-4mm/sec. Good for end burners, but largely un-necessary. In fact the best thing it's good for is making people envious.

[bob]

yeah I don't know much about this clay media I wouldn't think it would last long but I don't know it's just a guess

if it doesn't last long I would suggest getting a diffrent media IMO though as I don't know that much about it

the few bangs you here of I wounder about my self like was it leeking really bad and the motor lit it and then it went to the jar or did the rollers heat up and melt the jar

these things can be avodid easyle by

 

a) check your ball mill often at least when it is still new

make sure it is a none sparking motor

c) make sure you use ball bearings and oil them well

of course milling out side is a good idea and having it remote controle is also a good idea but is not a option for many a nother this is if your mill is out side to have a extension cord from it to inside your house so you can look out the windo if you see some thing thats not right ie smoke dust or some thing then you can unplug it right inside your house with out going to it

bob

Edited July 5, 2012 by bob

[yvariro]

Hi,

 

tomorrow I'm gonna buy some leads balls so ,and now i mill separately the chems, it's annoying but safer you have right

 

thanks for all the reply too!