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Gold Prospecting
Alluvial Gold Prospecting
sodium metaborate instead of borax
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<blockquote data-quote="davsgold" data-source="post: 523306" data-attributes="member: 6570"><p>G'day jon_m</p><p></p><p>Your on the right track mate, I do think you need two torches and keep them back out a bit from the graphite crucible, I have the nozzles of the torches only about half way into the hebel block.</p><p></p><p>And yes you don't need very much borax, first use of a new crucible I put maybe 1/4 teaspoon in with 65grams of cleanish nuggets, the cleaner the gold (acid cleaned) the less borax I use, and because there is remaining flux/borax lining the crucible for the next times it is used I put a lot less in.</p><p></p><p>The graphite crucibles do wear away from the heat anyway but I get at least twenty or more uses from one before it gets to thin, and I just crush it and pan of the remaining fine gold that is stuck in the glass flux/borax which is in the old crucible.</p><p></p><p>cheers dave</p></blockquote><p></p>
[QUOTE="davsgold, post: 523306, member: 6570"] G'day jon_m Your on the right track mate, I do think you need two torches and keep them back out a bit from the graphite crucible, I have the nozzles of the torches only about half way into the hebel block. And yes you don't need very much borax, first use of a new crucible I put maybe 1/4 teaspoon in with 65grams of cleanish nuggets, the cleaner the gold (acid cleaned) the less borax I use, and because there is remaining flux/borax lining the crucible for the next times it is used I put a lot less in. The graphite crucibles do wear away from the heat anyway but I get at least twenty or more uses from one before it gets to thin, and I just crush it and pan of the remaining fine gold that is stuck in the glass flux/borax which is in the old crucible. cheers dave [/QUOTE]
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Gold Prospecting
Alluvial Gold Prospecting
sodium metaborate instead of borax
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