Hi Phil,

I think the dross would be more hazardous than bar solder because it is a
powder that is more difficult to contain, is it more toxic? No. I would
think that both bar solder and tin/lead dross have the same toxicity level.
What I do is keep a pallet with my empty dross buckets back by the wave
solder machine, and when I get about 12-15 buckets I'll call my supplier
for a pick-up. Once it goes through the refining process we usually get a
check for a few thousand dollars.

As a side note, I do use Kleenox when I de-dross the pot to help cut down
on pulling a lot of metal out of the pot, but I don't mind pulling some
metal from the pot in order to introduce virgin bars back into the the pot
to keep the metal percentages in check. You can get too low on tin if you
are too fastidious about pulling ONLY the oxides from the pot.

Steve

On Tue, Aug 28, 2018 at 9:20 AM, Nutting, Phil <[log in to unmask]>
wrote:

> Yes, we still use some tin/lead solder.  A question came up recently about
> storing tin/lead dross from a wave solder machine because it was "hazardous
> material".  We would want to store it until we had enough material to make
> recycling it cost effective.
>
> How different is dross from raw bar solder of the same alloy?
>
> Phil Nutting  |  HVP Senior Development Engineer   |  Excelitas
> Technologies Corp
>
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Kimco Design and Manufacturing
Process Engineer
(208) 322-0500 Ext. -3133

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