Forwarded Message FollowsFrom: jones@perigee.net (Bob Jones)
To: “Orchid Digest” service@ganoksin.com
Subject: reconditioning used crucibles
Date: Mon, 2 Dec 1996 04:52:22 -0500
I am in the process of acquiring a used casting machines that
include with it two used crucibles that have a heavy coating of
flux glass on them from use. How would one go about removing
said flux glass and reconditioning the crucible for use??
Marshall Jones
jones@perigee.net
At 12:40 AM 12/3/96 +7, you wrote:
Forwarded Message Follows
From: jones@perigee.net (Bob Jones)
To: “Orchid Digest” service@ganoksin.com
Subject: reconditioning used crucibles
Date: Mon, 2 Dec 1996 04:52:22 -0500
I am in the process of acquiring a used casting machines that
include with it two used crucibles that have a heavy coating of
flux glass on them from use. How would one go about removing
said flux glass and reconditioning the crucible for use??
Marshall Jones
jones@perigee.net
I recomend you throw the crucibles out and get new ones if your casting
gold, because a contaminated crucible will alter your alloy. If your just going to cast silver, then heat up the crucible to a red color and scoop out the gooey flux with a graphite spoon or rod.
Daniel Saltsburg
@ingot
Dont throw it out!!! If you boil it in water with a little MR.CLEAN for
1/2 hour , it will not only remove the hardened flux, but you may find
an additional bonus of some gold in there !!. Let it dry a day or two
befor re-using. Good luck, Rob
Ringold’s Jewelers since 1908 9865 Bustleton Ave/ Phila, PA 19115
215-671-8190 Fax: 215-969-1803 Ringold@IX.netcom.com
Http://home.aol.com/REGALITE
Manufacturing / Mining / Product Development
At 12:40 AM 12/3/96 +7, you wrote:
Forwarded Message Follows
From: jones@perigee.net (Bob Jones)
To: “Orchid Digest” service@ganoksin.com
Subject: reconditioning used crucibles
Date: Mon, 2 Dec 1996 04:52:22 -0500
I am in the process of acquiring a used casting machines that
include with it two used crucibles that have a heavy coating of
flux glass on them from use. How would one go about removing
said flux glass and reconditioning the crucible for use??
I have read that you can clean all that gook out by boiling/soaking in a
weak sulphuric acid solution. I’ve never tried this but I think old
crucibles would probably best be trashed juding by the problems I’ve had
with same. I’m waiting for new crucibles to show up at the door now and
will let you know if this makes a difference…Dave
Art Jewelry for Conscious People
http://www.opendoor.com/stephensdesign/crystalguy.html
One way to clean them fairly well is to melt fairly clean scrap metal of
the type to be used in them prior to sending the scrap to the refiner.
In the case of sterling silver as the metal to be used in a casting
crucible it works well to clean by melting copper scrap and swirling it
around inside the crucible a bit…If there is excess flux just insert a
cold carbon stirring rod into the molten flux which and allow the excess
to stick to it…Gavin
At 12:40 AM 12/3/96 +7, you wrote:
Forwarded Message Follows
From: jones@perigee.net (Bob Jones)
To: “Orchid Digest” service@ganoksin.com
Subject: reconditioning used crucibles
Date: Mon, 2 Dec 1996 04:52:22 -0500
I am in the process of acquiring a used casting machines that
include with it two used crucibles that have a heavy coating of
flux glass on them from use. How would one go about removing
said flux glass and reconditioning the crucible for use??
I make it a practice to clean my crucibles after every 3 to 6 melts. I add a
teaspoon to a tablespoon of borax to the crucible, swish it around more or
less and pour it out. My worst contamination comes in the form of copper
oxides and this seems to take care of the problems. Metals are poured out
more easily from the crucibles as they are a lot heavier.
http://www.knight-hub.com/manmtndense/bhh3.htm
e-mail: @Bruce_Holmgrain
snail mail: POB 7072, McLean, VA 22106-7972, U.S.A.
Bruce Holmgrain wrote:
At 12:40 AM 12/3/96 +7, you wrote:
I am in the process of acquiring a used casting machines that
include with it two used crucibles that have a heavy coating of
flux glass on them from use. How would one go about removing
said flux glass and reconditioning the crucible for use??
I make it a practice to clean my crucibles after every 3 to 6 melts. I
add a teaspoon to a tablespoon of borax to the crucible, swish it around
more or less and pour it out. My worst contamination comes in the form
of copper> oxides and this seems to take care of the problems. Metals
are poured out more easily from the crucibles as they are a lot
heavier.
Bruce - do you heat while doing so? This is an excellent remedy to a
problem which has long plagued me. Thanks, man, and howdy from the snow
covered mountains of Idaho, Mike
At 09:47 PM 12/3/96 -0800, Mike Rogers wrote:
Bruce Holmgrain wrote:
At 12:40 AM 12/3/96 +7, you wrote:
I am in the process of acquiring a used casting machines that
include with it two used crucibles that have a heavy coating of
flux glass on them from use. How would one go about removing
said flux glass and reconditioning the crucible for use??
I make it a practice to clean my crucibles after every 3 to 6 melts. I
add a teaspoon to a tablespoon of borax to the crucible, swish it around
more or less and pour it out. My worst contamination comes in the form
of copper> oxides and this seems to take care of the problems. Metals
are poured out more easily from the crucibles as they are a lot
heavier.
Bruce - do you heat while doing so? This is an excellent remedy to a
problem which has long plagued me. Thanks, man, and howdy from the snow
covered mountains of Idaho, Mike
Sorry, Yeah, I heat the crucible to melt the borax. The molten borax thins
out the old borax and can be poured out.
E-mail: manmountaindense@knight-hub.com
WWW: http://www.knight-hub.com/manmtndense/bhh3.htm
Snail: POB 7972, McLean, VA 22106