molten pig iron spills from towering furnaces, creating a captivating display of flames and sparks in the heart of a bustling

molten iron pig steel mill overhead crane furnaces metal pouring industrial flames sparks production hot ironworks manufacturing casting foundry ladles heavy machinery heat glowing fiery working environment raw materials smelting factory labor line metallurgy craftsmanship industry automation orange glow flying high temperatures workers processes boilers process treatment spills towering creating captivating display heart bustling