Big Scrapper
Posted: Sun May 29, 2011 7:10 pm
My lil' Scrapper gave up the ghost during my last run. Once the hotface started breaking away around the top it quickly went south. It really took a beating from sitting wheels on it and of course knocking on them when they were hot short to hurry their progress down into the bore. It just wasnt really up to task with the bore being smaller than a wheel.
So lil' Scrapper will get a makeover as a #20 crucible furnace, getting a couple of SiC crucibles this size soon because I have a new project coming together that will have some castings that are too big for #10. Will be sizing the bore to the #20 and adding a flame trainer to it with a nice combustion chamber in the bottom. Will also be going with a 1" plus hotface because I dont want to be rebuilding this furnace any time soon.
This means I am going to need some means of making ingots when I run out of metal from the last run. I did 30 wheels so I have some time on this but have to start thinking about it now and getting the parts together.
The Big Scrapper is going to be a two burner monster with a 30" bore. Filled to the drain hole capacity will be just over 200 lbs and the pool will be 4 1/2" deep.
The tuyeres are 3" and the hotface will be ~1 1/4", the spout hole is 1 1/2".
The shelf there has a 10" diameter hole where the lip is formed and 3 rows of 1/2" holes out to a 18" diameter. The shelf is removable in case I want to be able to drop an engine block in there
The empty space between the hotface and shell will get a foam/refractory insulating layer.
Considering rolling rings out of angle iron and a shell from sheet steel. All these posts on ring rollers has me wanting to build one The tilt will be set up so that it rotates about the spout for consistent pouring through the arc, this will be nice pouring ingots but invaluable if I ever decide to do a really big casting. Will probably use an electric trailer tongue jack for the actuator because this thing is going to be real heavy.
Not real sure what will end up on top if anything. I was thinking if I ever end up doing engine blocks then a riser section would be good and have not given a lot of thout to a lid. On the lil scrapper I never did use the lid while scrapping.
So lil' Scrapper will get a makeover as a #20 crucible furnace, getting a couple of SiC crucibles this size soon because I have a new project coming together that will have some castings that are too big for #10. Will be sizing the bore to the #20 and adding a flame trainer to it with a nice combustion chamber in the bottom. Will also be going with a 1" plus hotface because I dont want to be rebuilding this furnace any time soon.
This means I am going to need some means of making ingots when I run out of metal from the last run. I did 30 wheels so I have some time on this but have to start thinking about it now and getting the parts together.
The Big Scrapper is going to be a two burner monster with a 30" bore. Filled to the drain hole capacity will be just over 200 lbs and the pool will be 4 1/2" deep.
The tuyeres are 3" and the hotface will be ~1 1/4", the spout hole is 1 1/2".
The shelf there has a 10" diameter hole where the lip is formed and 3 rows of 1/2" holes out to a 18" diameter. The shelf is removable in case I want to be able to drop an engine block in there
The empty space between the hotface and shell will get a foam/refractory insulating layer.
Considering rolling rings out of angle iron and a shell from sheet steel. All these posts on ring rollers has me wanting to build one The tilt will be set up so that it rotates about the spout for consistent pouring through the arc, this will be nice pouring ingots but invaluable if I ever decide to do a really big casting. Will probably use an electric trailer tongue jack for the actuator because this thing is going to be real heavy.
Not real sure what will end up on top if anything. I was thinking if I ever end up doing engine blocks then a riser section would be good and have not given a lot of thout to a lid. On the lil scrapper I never did use the lid while scrapping.