mill scale export related costs from
mill scale export related costs from . 2016 08 12T14:08:54+00:00. Mill Scale Export Related Costs From HN Bochuang . Mill scale consists primarily of magnetite, Fe 3 O 4, of characteristic bluegray steely color An extremely thin outer film of hematite, Fe 2 O 3, is invisible to the naked eye The inner portion of the magnetite contains fine metal grains and sometimes, residual