Preparation of solid polyferric sulfate from pyrite cinders and its structure feature

来源期刊：中国有色金属学报(英文版)2003年第3期

论文作者：郑雅杰 龚竹青 陈白珍 刘立华

文章页码：690 - 694

Key words：pyrite cinders; NaClO₃ oxidation; solid polyferric sulfate; structure feature

Abstract: Acid leaching solution was obtained after mixing pyrite cinders with H₂SO₄, then heating the mixture of pyrite cinders and H₂SO₄ at 200-300℃, leaching the heated mixture with water and filtrating. Polyferric sulfate (PFS) solution was produced by adding suitable amounts of FeSO₄·7H₂O and NaClO₃ into acid leaching solution. By concentrating and drying PFS solution, solid PFS with alkali degree of 6.40%-22.4% was prepared. Fe_4.67(SO₄)₆(OH)₂·20H₂O in the solid PFS was discovered by XRD analysis. FT-IR spectroscopy shows that the absorption peaks at 3400cm^-1 and 1635cm^-1 arise from OH and absorption peaks at 998cm^-1 and 669cm^-1 come from Fe—OH in the solid PFS.