# Ball milling machine, milled strontium, and milled barium

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#### DannyB

Hi all, I'm looking for an inexpensive ball milling setup, all I can find are industrial ones in the thoasands of dollars. Alternatively, if you have any milled strontium or barium nitrate that you're interested in getting rid of I'm looking for some. Thanks!

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#### DannyB

Spot on what I needed, you're the man Steve. I spent hours searching for this this morning. Thanks a bunch!

#### Steve Shannon

##### Well-Known Member
TRF Supporter
Spot on what I needed, you're the man Steve. I spent hours searching for this this morning. Thanks a bunch!
It appears that Skylighter buys that and resells it. They have the lead ball grinding media also.

#### DannyB

Thanks Steve! I didn't see your post until after I ordered 0.38" balls (lead) off eBay, 100 of them. I would've added it to my pending order at slylighter, oh well. Does that size and count seem reasonable for the machine I bought? Never done this before, and will NEVER do it with AP. What I know is stand away, do it outside, and clean thoroughly or use separate machine for each chemical. Got any other pointers to keep me safe? How long do you typically run the machine for to get say 100 micron strontium down to 10 or so, or whatever size it takes to get a nice red? Is it hours or days? Thanks again!

#### prfesser

Rule of thumb for efficient ball milling is that the jar should be about half-full of media, and the material to be ground should be just enough to fill the spaces between the media. That's from Lloyd Sponenburg's book on ball milling theory and practice.

A properly designed and charged ball mill should reduce granular material to flour in an hour or less. The actual time required to mill to a specific size (distribution) is a function of the shape and hardness of the media, the hardness of the charge, and some other variables.

Best,
Terry

#### AlphaHybrids

##### Well-Known Member
I would look up the toxicity of barium nitrate and see if you are comfortable with all the personal protective equipment you need to grind it up before you do so.

Edward

#### Steve Shannon

##### Well-Known Member
TRF Supporter
Thanks Steve! I didn't see your post until after I ordered 0.38" balls (lead) off eBay, 100 of them. I would've added it to my pending order at slylighter, oh well. Does that size and count seem reasonable for the machine I bought? Never done this before, and will NEVER do it with AP. What I know is stand away, do it outside, and clean thoroughly or use separate machine for each chemical. Got any other pointers to keep me safe? How long do you typically run the machine for to get say 100 micron strontium down to 10 or so, or whatever size it takes to get a nice red? Is it hours or days? Thanks again!
I have no idea. The only reason I knew where to buy the machine and lead balls is because I considered buying one for myself to make BP. Ned Gorski and Skylighter have YouTube videos that should answer some of your questions.

Steve Shannon

#### ksaves2

I have no idea. The only reason I knew where to buy the machine and lead balls is because I considered buying one for myself to make BP. Ned Gorski and Skylighter have YouTube videos that should answer some of your questions.

Steve Shannon
Steve, BP? were you going to do home made ejection charges or also pursue a pyrotechnic hobby? I see if you live in Big Sky country you'd probably be able to do things like that without being bothered from outsiders. Kurt

#### DannyB

Thanks for looking out Edward. I'm aware of the dangers and barium and comfortable don't go in the same sentence for me, there's nothing comfy about it, but I do take very serious precautions and if I can't get a nice green after milling it I'm giving up on barium for good. Anyone want a few pounds if I fail?

#### Steve Shannon

##### Well-Known Member
TRF Supporter
Steve, BP? were you going to do home made ejection charges or also pursue a pyrotechnic hobby? I see if you live in Big Sky country you'd probably be able to do things like that without being bothered from outsiders. Kurt
Homemade ejection charges; I haven't done fireworks for decades. I just have YouTube inspired manic behavior. [emoji851]

Steve Shannon