Exposure to Iron Oxide fumes can cause metal fume fever. This is a flu-like illness with symptoms of metallic taste, fever and chills, aches, chest tightness and cough. … * Repeated exposure to Iron Oxide fume or dust can cause pneumoconiosis (Siderosis) with cough, shortness of breath and changes on chest x-ray.
https://nj.gov/health/eoh/rtkweb/documents/fs/1036.pdf