Home |
Search |
Today's Posts |
|
Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
Reply |
|
LinkBack | Thread Tools | Display Modes |
#1
|
|||
|
|||
Magnesium chloride?
On Sat, 12 Feb 2005 23:02:01 -0600, "Tim Williams"
wrote: I know it's used for ice melter, but the question is: can I find it alone? The Home Depot in Fridley MN has it. YMMV. |
#2
|
|||
|
|||
"Don Foreman" wrote in message
... The Home Depot in Fridley MN has it. YMMV. Ok. Didn't know if I could find it alone in anything less than ton quantities (or reagent grade, heh). Tim -- "I've got more trophies than Wayne Gretsky and the Pope combined!" - Homer Simpson Website @ http://webpages.charter.net/dawill/tmoranwms |
#3
|
|||
|
|||
On Sun, 13 Feb 2005 12:23:06 -0600, "Tim Williams"
wrote: "Don Foreman" wrote in message .. . The Home Depot in Fridley MN has it. YMMV. Ok. Didn't know if I could find it alone in anything less than ton quantities (or reagent grade, heh). It's called "Dust-Gard" and "Freeze-Gard" (same bag, different sides). It's also used for soil stabilization and as an additive for cattle feed. If your Home Depot doesn't have it, try a co-op. I think a 50 lb was about $12. |
#4
|
|||
|
|||
On Sun, 13 Feb 2005 16:53:01 -0600, Don Foreman
wrote: On Sun, 13 Feb 2005 12:23:06 -0600, "Tim Williams" wrote: "Don Foreman" wrote in message . .. The Home Depot in Fridley MN has it. YMMV. Ok. Didn't know if I could find it alone in anything less than ton quantities (or reagent grade, heh). It's called "Dust-Gard" and "Freeze-Gard" (same bag, different sides). It's also used for soil stabilization and as an additive for cattle feed. If your Home Depot doesn't have it, try a co-op. I think a 50 lb was about $12. As a 34% solution, I had to use hastelloy or tantalum in my mag meter electrodes, or the electrodes would dissolve. I once had a power failure in the mag chloride drying plant I ran, went out and inspected, and saw mag chloride pouring from a light switch. ALL of the lighting conduits and circuits had to be replaced. Traced it to the aforementioned dissolved electrodes in a mag flow meter. Are you sure that **** won't dissolve your crucibles? Pete Keillor |
#5
|
|||
|
|||
"Peter T. Keillor III" wrote in message
... As a 34% solution, I had to use hastelloy or tantalum in my mag meter electrodes, or the electrodes would dissolve. I once had a power failure in the mag chloride drying plant I ran, went out and inspected, and saw mag chloride pouring from a light switch. ALL of the lighting conduits and circuits had to be replaced. Traced it to the aforementioned dissolved electrodes in a mag flow meter. LOL, yipe! Is that corrosion, displacement or what? Are you sure that **** won't dissolve your crucibles? Oh, I'm sure it will, but crucibles are disposable by their nature anyway. So far my SiC has been withstanding ice melter well. The last metal crucible I was working with got a bad case of aluminum brazed in it though... salt is a wonderful flux! FWIW, an "alloy" of 25-30% (by weight) MgCl2, balance KCl, should melt around 793°F. I'm going to see if that is a workable aluminum brazing/welding flux... Tim -- "I've got more trophies than Wayne Gretsky and the Pope combined!" - Homer Simpson Website @ http://webpages.charter.net/dawill/tmoranwms |
#6
|
|||
|
|||
On Sun, 13 Feb 2005 18:13:57 -0600, "Tim Williams"
wrote: "Peter T. Keillor III" wrote in message .. . As a 34% solution, I had to use hastelloy or tantalum in my mag meter electrodes, or the electrodes would dissolve. I once had a power failure in the mag chloride drying plant I ran, went out and inspected, and saw mag chloride pouring from a light switch. ALL of the lighting conduits and circuits had to be replaced. Traced it to the aforementioned dissolved electrodes in a mag flow meter. LOL, yipe! Is that corrosion, displacement or what? Are you sure that **** won't dissolve your crucibles? Oh, I'm sure it will, but crucibles are disposable by their nature anyway. So far my SiC has been withstanding ice melter well. The last metal crucible I was working with got a bad case of aluminum brazed in it though... salt is a wonderful flux! FWIW, an "alloy" of 25-30% (by weight) MgCl2, balance KCl, should melt around 793°F. I'm going to see if that is a workable aluminum brazing/welding flux... Tim Hmmm. Maybe you'll be o.k. We ran the cells on a eutectic mixture of KCl, NaCl, plus a few others, with MgCl2 as a minor component. Operating temperature was ~700 deg C. The cell internals were constructed of 99.5+% pure alumina Coors brick, thousands upon thousands of them, at about $25-$30 / brick (late '70's dollars). The cell had about 1' - 18" thick internal walls, and was about 50' long x 30' wide x 7' deep. The Coors brick held up extremely well as long as it wasn't thermally shocked. We ran at 200VDC, 18,000 A. That was a fun project, although damned expensive. Pete Keillor |
#7
|
|||
|
|||
"Peter T. Keillor III" wrote in message
... We ran the cells on a eutectic mixture of KCl, NaCl, plus a few others, with MgCl2 as a minor component. Operating temperature was ~700 deg C. The cell internals were constructed of 99.5+% pure alumina Coors brick, thousands upon thousands of them, at about $25-$30 / brick (late '70's dollars). The cell had about 1' - 18" thick internal walls, and was about 50' long x 30' wide x 7' deep. Nice. What'd it make? Sodium or potassium? That's another thing I'm looking into doing some day (and yes I'm aware of the dangers of highly reative metals, and I've seen Theodore Gray's sodium party webpage, not that it was a deterrent! ) I'm guessing silica has solubility in the salt, hence you can't use normal acid firebrick? The Coors brick held up extremely well as long as it wasn't thermally shocked. We ran at 200VDC, 18,000 A. That was a fun project, although damned expensive. Sounds like it! Tim -- "I've got more trophies than Wayne Gretsky and the Pope combined!" - Homer Simpson Website @ http://webpages.charter.net/dawill/tmoranwms |
#8
|
|||
|
|||
On Sun, 13 Feb 2005 19:52:20 -0600, "Tim Williams"
wrote: "Peter T. Keillor III" wrote in message .. . We ran the cells on a eutectic mixture of KCl, NaCl, plus a few others, with MgCl2 as a minor component. Operating temperature was ~700 deg C. The cell internals were constructed of 99.5+% pure alumina Coors brick, thousands upon thousands of them, at about $25-$30 / brick (late '70's dollars). The cell had about 1' - 18" thick internal walls, and was about 50' long x 30' wide x 7' deep. Nice. What'd it make? Sodium or potassium? That's another thing I'm looking into doing some day (and yes I'm aware of the dangers of highly reative metals, and I've seen Theodore Gray's sodium party webpage, not that it was a deterrent! ) I'm guessing silica has solubility in the salt, hence you can't use normal acid firebrick? The Coors brick held up extremely well as long as it wasn't thermally shocked. We ran at 200VDC, 18,000 A. That was a fun project, although damned expensive. Sounds like it! Tim Magnesium. It was a looong time ago, but I think we fed to about ~7%. At one point I was asked and did set up direct spray of 34% into the feed chamber. I had some spray nozzles machined from 1" tantalum bar. I don't know what that stuff cost, but I remember we had to put in a safe to have it. I recall the machinist saying it was nasty to machine, CCl4 coolant I think. It worked great (we had efficiency and therefore heat issues) until a clod would build up and drop in. The resulting steam explosions were rated by how many 10" blind flanges flew into the air (2-clank, 3-clank). We finally had a 6-clank (all) with blind flanges falling everywhere and decided to call it a day. Pete Keillor |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
Melting aluminium / magnesium alloy | Metalworking | |||
Salt and vinegar for rust removal | Woodworking | |||
Calcium Chloride - neutralize | Home Repair | |||
Etching 304 Stainless Steel with Ferric Chloride Problems | Metalworking | |||
Q: Welding Magnesium | Metalworking |