Serious question, my foreman said my ladle angle was causing slag in the pour, but I've always done it that way.

He told me to tilt it back a solid 15 degrees more before the transfer, and after a week of trying it, my scrap rate on the gray iron castings dropped by almost 8%.

3 comments

3 Comments

sean_foster522mo ago

Man, that's wild. I read something similar in an old foundry manual once, about how the angle can trap air and slag if you're not careful. They had a diagram showing almost exactly what your foreman said, a steeper tilt keeps the junk away from the lip. It's one of those things you don't think matters until you see the numbers drop. Your scrap rate going down that much proves it. Sometimes the old guys just know the tricks.

jordan65324d ago

Hang on, I gotta push back a little on that. The slag and air trapping thing sounds right at first, but I think the real issue is more about turbulence than anything else. A steeper tilt doesn't just keep junk away, it changes how the metal flows into the mold. Less splashing means fewer gas bubbles getting trapped, which is a big deal for porosity. I've seen setups where the angle was fine for keeping slag back, but the scrap was still high because the pour was too chaotic. So maybe your manual had the right fix, but the "why" is a bit more about flow mechanics than just slag location.

the_ryan2mo ago

Wait, it's not about trapping air, it's about the slag layer itself. That steeper tilt just keeps the lighter slag further back from the pour spout. The old manual had the right fix but the wrong reason.