only connect Posted December 10, 2010 Share Posted December 10, 2010 how can I grind barium nitrate without health problems caused by dust? Link to comment
Tyneman Posted December 10, 2010 Share Posted December 10, 2010 By using a good respirator? Without correct safety equipment you should not even attempt to work with a chemical this poisonous. So clean your ballmill, get (ALL) your gear on and start grinding. Link to comment
only connect Posted December 10, 2010 Author Share Posted December 10, 2010 yes I have a respirator! So Can I grind it in a ball mill? I ask it because I've read that you can grind only KNO3, C,S. But I've also read that you can grind all chemicals separatly without problems. Link to comment
Tyneman Posted December 11, 2010 Share Posted December 11, 2010 You can mill all chems seperatly. But make really sure your Ballmill is CLEAN and don't forget that the media is the biggest part in that. Link to comment
only connect Posted December 13, 2010 Author Share Posted December 13, 2010 thx!! I just tested my green MgAl stars..They are very very beautifull! The green is intensive but the only problem is to light the stars.. I tried to prime with BP without results(is too cold).. what kind of prime must I use? I don't want to use chlorate or perchlorate. A simple prime formula if is possible.. Link to comment
Leander Posted December 13, 2010 Share Posted December 13, 2010 I don't know the exact composition you're using. A common green metallic star composition used here consists of Ba(NO3)2, Parlon and MgAl and is called emerald green. This composition can be primed by straight dextrinated meal +10% MgAl. Slightly wet the stars using a spray can, and roll them trough the ballmilled prime. I would try this first, since it seems to be adequate for most color compositions I've used so far. If it does preforms poorly using primes containing perchlorate (e.g. veline superprime) of step priming is the way to go. Link to comment
explomaan Posted December 13, 2010 Share Posted December 13, 2010 I was told by others that 5-10 % Si powder in your meal can light almost anything... Link to comment
Tyneman Posted December 14, 2010 Share Posted December 14, 2010 You could try a hotter then meal prime. This is a verry wel working one, especially when finished by a layer of straight meal afterinitial priming. Hot Igniter Star Prime[*]Chemical Percent [*]Potassium perchlorate 71% [*]Charcoal, airfloat 14% [*]Red gum 9% [*]Magnalium 6% (Same size as used in stars being coated) As stated above, meal + 5%Si will light just about anything. Link to comment
only connect Posted December 14, 2010 Author Share Posted December 14, 2010 Thanks to all but I haven't perchlorate and silicon. the forumula that i've used is: Hardt Green Star #5 Barium nitrate 56 Red gum 7 Magnalium -200 mesh 17 PVC 15 Dextrin 5 with 25% alcohol / 75% water but is safe to ballmill BP with MgAl together? Link to comment
explomaan Posted December 14, 2010 Share Posted December 14, 2010 This star is really hard to ignite so I recommend you to use a good step-priming. And no, metals do not belong in your ballmill with oxidisers . Link to comment
only connect Posted December 14, 2010 Author Share Posted December 14, 2010 so you are talling to me that a composition based on nitrate and MgAl is not sufficent to light the stars? Link to comment
ExplosiveCoek Posted December 14, 2010 Share Posted December 14, 2010 No, he's tElling you to use step-prime . e.g.: raw star mix, then: meal:star mix 25: 75 50:50 75:25 pure meal to finish the star. Link to comment
only connect Posted December 14, 2010 Author Share Posted December 14, 2010 thx! E.C. I will try and I will post the results! Link to comment
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