This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
AluminumFromClay . The final step in the production of alumina from clay in the pilot plant at the National Bureau of Standards is the conversion of hydrated aluminum chloride to alumina by calcination The aluminum chloride crystals are fed into the hopper at the top of the foot Herreshoff furnace and are stirred constantly by rabble