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Old 09-26-2016, 07:47 PM
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allessence allessence is offline
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Default Flux making Hydrous borax to anhydrous borax.

Well since the trailer is coming to completion and I've been using it more for work than working on it I decided it was time to make more welding flux..

Making it is a loose turn of phrase as really I'm just taking the hydrous borax and making it into anhydrous borax..

Basically one has water in it.. The other doesn't..

You may ask how I get the water out.. You have to melt it and grind it back up..

You may also ask how come I waste my time doing it instead of buying anhydrous borax to begin with.

The guy who got me into the hardware scene bought me 80lbs of the stuff nearly 30 years ago.. 80lbs is like 3.5, 5gallon pails of the stuff..

I have 2 or just under 2 pail left.. It's one of those things where in use a little goes a long way.. I am amazed when I watch youtube videos and the guys are dumping huge amount of flux on.. It's because more than likely they are using 20 Mule team borax which isn't pure.. Or at least it wasn't pure and its also hydrous borax..

Tomorrow I'll put it in my motor and pencil and grind it up..

If you guys have any ideas on a simpler. faster and more effective way to grind the stuff up I'd be happy to listen.. I was thinking along the lines of the coffee grinder.

The stuff once melted and hardened is brittle like sugar and snaps.. Its not as hard as sand..
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Old 09-26-2016, 08:23 PM
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Think a cement mixer would break it up to powder again?
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Old 09-26-2016, 09:08 PM
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Quote:
Originally Posted by milomilo View Post
Think a cement mixer would break it up to powder again?
More than likely but I doubt there would be any left to scoop out unless I melted down the rest of the 50lbs..

Something much smaller.. I usually do it by hand.. I'll post a picture of the unit i use as well..
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Old 09-26-2016, 09:15 PM
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is a pepper grinder too small?
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Old 09-26-2016, 09:24 PM
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Coffee grinder?
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Old 09-26-2016, 09:48 PM
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What do you call the big black ball? Melted water?
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Old 09-26-2016, 10:27 PM
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A small grist mill for grinding grain would work, that stuff is brittle
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Old 09-26-2016, 10:44 PM
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The guys that make their own black powder seem to get by modifying rock tumblers to make a ball mill to grind their powder up. Might be worth looking into for this too.
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Old 09-27-2016, 07:04 AM
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Quote:
Originally Posted by slip knot View Post
is a pepper grinder too small?
More than likely.. but the idea of the pepper grinder and the coffee grinder are about the same.. The coffee grinder is just bigger..
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If I defend myself I am attacked.

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My attack thoughts are attacking my invulnerability.

I'd like to think of something smart, but I don't want to hurt myself.

My google+ page

DoALL 36"
Another Johnson model J Project
Lathe? Maybe..... 1958 SBL 13"
Yeti Esseti Aka running welder on 3phase.
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  #10  
Old 09-27-2016, 07:46 AM
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Coffee grinders don't have a lot of torque and like to be run pulsed, not continuous. I tried using them to grind up cottonseed a few years back and had dismal results. Another issue I have had with them is actually moving the powder they do make out of the way. They'd churn the crap outta what was right in the center of the blade but wouldn't do much else.

A hand blender wasn't any better, but I did find a food processor that'd do a decent job. The unit I used attaches to my hand blender and was still small enough to easily dump back out. I'll post a picture of a similar unit, not necessarily a product recommendation just the first one I found of the sort.

Beyond that, I think the rotary tumbler idea would work well too.
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