With the difference that a forced air burner increases the temperature in the furnace chamber with about 200 C.
The stainless shell is not a big issue. Here my small furnace made from a stainless steel kitchen trashcan. The difference with the Vevor is the...
HT1, you are right. Today I melted cast iron in a brand new Salamander and heated it over 1400 C and the glazing remained intact. On the inside I...
Indeed, it is the same crucible. Left a new one which I received this week and oven- (woodstove-) dried yesterday and right one used a few times...
Rather useless compared to the single burner design most of us use. The Kaowool wall is not lined with a Satanite / Fermit like layer on the...
Today I got two 200ml crucibles from Amazon. Not the best, but for copper temps these are OK. They last about 20 melts and recently one was...
That is exactly the reason why I use the bottom half of a worn out crucible upside down as a plinth. They won't crack. And I paint it to make it a...
I have had a furnace built from Mizzou concrete, but it soaks heat. As you say, when hot, it retains the heat well, but a well insulated furnace...
This is a very good idea, I did this as well. No more Mizzou or another concrete for me as these are heat soaking. My newest furnaces are made...
Today I melted some copper in a last time use crucible which had a crack. When it was molten, I took the crucible out but it broke apart and the...
That I do also, skimming off the crud from the hot liquid metal straight when taking out from the furnace. Then I pour and then I scrape the...
What I do to keep my crucibles clean is that after the pour (copper, bronze or cast iron) I quickly scrape off the inside of the orange hot...
You mean like ladles in the steel industry with a valve in the bottom controlled by the tube you mentioned which opens when the steel is to be...
Here a try of the same casting in cast iron. Same mold as picture 1 in the OP (two castings at a time) with vent holes. One of the castings was...
Making plinths ? Now I use an old crucible which cannot be used anymore. I cut it in half and glue the bottom part upside-down to the furnace...
Indeed, this picture shows clearly that the immersed part of the crucible is barely deteriorated, unlike above that. You add 1 ounce (31g) of FeSi...
Probably that the lower part which is immersed in the metal is protected against attack by slag. That is the reason using too much borax or other...
This cannot be done with cope and drag. This is a very complex casting and it is amazing that these guys have the patience and the experience...
On this forum there are some topics about electric furnaces using Kanthal wire elements which can reach at most 1400 C element temperature which...
Really nice video, particularly the molding. But at 5:28 he is melting the brass and standing in the zinc fumes and does not wear any PPE. A face...
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