I worked a summer
stint at
Birmingham Steel down in
Birmingham, AL during college. Birmingham Steel recycles junk
iron and
steel and makes it into
rebar. Their
smelting schedule was fairly regular and if I got to work just before 7am, they would have just drawn off a load of
slag from the
electric-arc furnace.
Their technique for disposing of the slag was to back a regular dump truck up to the slag removal port of the furnace and pour the molten slag into it. Then some brave soul would drive the dump truck around to the rear of the plant and dump it out in a slag pit. Keep in mind that slag is molten, burning, flaming waste. Now imagine watching a dump truck drive by, a 40 foot high pillar of flame pouring out of the back of it, and a lone steel plant worker with balls of steel in the driver's seat.
I dunno if OSHA approved of this ..