well ive been been using flower pots with perlite and portland cement which keeps cracking
but works for small amounts of tin , lead , alum that ive been casting in my backyard ,
using a propane burner i made based off this
http://www.backyardmetalcasting.com/oliverburner1.html
now ive worked my way up to needing a bigger better foundy setup , id like one big enough to melt about a cup's worth of metal at a time , somthen like this one
http://www.backyardmetalcasting.com/bucketfurnace1.html
refractory recipe :
"By volume, it is 3:3:4 Portland cement:perlite:silica sand, mixed
together thoroughly, then combined with 4 parts fireclay. The dry
ingredients are then moistened to the texture of “stiff cookie dough,”
packed into a form, and allowed to dry thoroughly before bake-out."
then for greensand :
"100 lbs sand Silica or Olivine 12 lbs powdered bentonite 7 lbs water (1 gallon)"
i also have a charcoal forge based off a brake drum and i make my own charcoal from a tree i cut down in my yard , lol this way
https://www.youtube.com/watch?v=UwvpjSPCBJ0
i really need like 50lbs to 100lbs of each fireclay / bentonite / sand ,etc so i have some to build a 2nd foundry and to have extra and alot of times i try to build two of everything so i can sell one to cover cost of mine!
one reason im upgrading is a buddy convinced me i could sell some belt buckles and stuff ive made before but in a larger scale an for alot more money then id have thought !
repairing scooters an stuff over time ive collected alot of aluminum just with the plan to melt back down an remake new parts , im closer then ever to being able to mill an machine down my casted stuff ! :)
i need a cow for leather too,, but ill wait on that :) hehe