Separation and dissolution method of trace metal iron in iron oxide using low concentration nitric acid

摘要

The method separates and resolves metal-Fe from iron-oxide by use of low concentration HNO3. In separating process of a little amount of metal-Fe, iron-oxide is crushed to below 200 mesh size, and placed in 1:10-30 (HNO3:water) solution of HNO3, and then resolved bt stirring at 70-85 deg.C for 0.5-10 min to separate iron-oxide by filter paper.