smelter

My grandfather was born in New Mexico to a father who worked at a smelter.

"I made a little pilot smelter while you were gone," George said.

It ran to that amount by actual smelter test, the story goes.

Two other men came in from the porch: the old smelter Tveryakov and his lodger, the stoker Rybin, a staid, dark-colored peasant.