Comparisons of species and coagulation effects of PFS solution and solid PFS from pyrite cinders

来源期刊：中国有色金属学报(英文版)2002年第5期

论文作者：郑雅杰 龚竹青 刘立华 陈白珍

文章页码：983 - 986

Key words：pyrite cinders; PFS solution; solid PFS; species; coagulation

Abstract: Pyrite cinder is a kind of solid waste of sulfuric acid industry. After mixing pyrite cinders with sulfuric acid, ferric sulfate was obtained by heating, maturing, dissolving and filtrating. Suitable amounts of FeSO₄·7H₂O and NaClO₃ were added into ferric sulfate solution and polyferric sulfate(PFS) solution was produced. Solid PFS was made by concentrating and drying PFS solution. Time-dependent complex colorimetric tests were done while ferron agent reacted with Fe³⁺ in the solution. The results show that the proportion of transitional low polymeric species and high polymeric species are increased after PFS solution is transferred into solid PFS. It was discovered by jar tests that solid PFS has very good coagulation effects relevant to the increase of transitional lower polymeric species.