Another short day in the old shop. I had some personal business to take care of this morning and that can drag right out and eat up your day.
But I did get some refractory mixed and put in the form for a burner tile.
I had never mixed any of this refractory before, Greencast 94+. It is abrasion resistant and good for 3,500F. That's hotter than Cuda Chick (sorry, but it is HOT). It mixed like concrete with coarse sand and no gravel. I used three times the recommended water in order to get it to mix.
While waiting for it to set up I melted some more cans. Slowly gaining experience. As I have mentioned the cans make a lot of slag. Some literature even recommends not using them for a raw material.
I can see some aluminum in the slag so I've been wanting to reheat some to see if I can draw out some more metal. So I busted up my slag pile
and heated it up. I couldn't get it to really melt so I started pushing down on the slush and got a little metal on top. Heated some more and tamped it gently and got a lot of metal off it. Poured that out and there was dry "dirt" under it. Here it is next to the handle of the crucible.
I was quite pleased with this outcome. I also had added a can with some salt in it (salt is supposed to be a flux for aluminum) so I don't know if the salt helped. I may try salt in the initial melt. I may also try tamping instead of skimming on the initial melt. All I read says to skim.
After about an hour the refractory had set enough to scratch 2-17 in it. I took a chance and twisted the pattern. It came right out and didn't damage the cone, I had a little sagging next to the date, not too much to use.
I was afraid I would have to drill out the pattern and I want to use it on furnace construction. so it came out and cleaned up well.
Got brave and took the forms off, then broke it loose from the base and set it in the toaster oven. I really need an oven out here. I turned the oven on to 150F then thought better of it and turned the oven off. It needs to dry 24 hours or more before starting to heat cure.
With today's work I have about 6 lbs of muffins.
Saw the mayor when I was at the Post Office. She is a crafts person, artist, and town booster. Told her about my foundry and asked her to design a town heritage based trivet, told her I would cast her some. She got all mushy and told me she just adored me

Maybe I'll get a free pattern

Foundry is slowly getting into business.
Things to do:
1 Make a refractory lined furnace
2 Make a bigger pipe crucible (this one won't take smashed cans easily)
3 Make pouring tongs (made lifting ones)
4 Finish green sand bin (green sand is sand with enough clay to stick together to make a mold)
5 Add shevling for tools
6 Get some sand hauled in for a level work surface
7 Add a roof over the furnace area
8 Do a test pour in sand
and lots more!
Thanks for looking in!