Anthracite grinding ball. Device used in mills for grinding anthracite. Anthracite is a hard variety of mineral coal. Once mined it needs to be milled to produce lumps of uniform size for use in industrial applications. Photographed at the Zollverein Coal Mine Industrial Complex,Germany | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Wiersma, Dirk |
Bildgröße: | 5125 px × 3417 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |