Visual inside Sudbury Inco smelter; shots of large cauldron being banged against steel structure to shake off half molten metal caked inside. Shots of molten metal sparkling inside blast furnace, shots of workers nearby. Shot of tractor with pneumatic hammer breaking off ore caked around opening. Shots of workers preparing for dumping of molten metal, of cauldron being placed into position, of molten metal pouring from another cauldron into furnace, including shots of workers wearing protection.