Effect of Heating Temperature for Fusion on Purification of the Raw Iron Oxide from the Zinc Leach Residue, and the Synthesis of Mn-Zn Ferrite used Resultant Purified Iron Oxide.

Abstract

The purification of raw iron oxide obtained from iron precipitation of the Zinc leach residue using the recrystallization method with Na₂B₄O₇ flux and magnetic properties of Mn_0.95Zn_0.05Fe₂O₄ synthesized from resultant iron oxide has been investigated.
The main purposes of present study are to decrease the heating temperature as much as possible for reduction of the purifing energy cost, and to examine effects of decrease in heating temperature on iron oxide morphology and removal of Zn, S, As, and effect of iron oxide purity on magnetic properties of Mn_0.95Zn_0.05Fe₂O₄ synthesized from resultant iron oxide.
The main results obtained as follow:
(1) Morphology of purified iron oxide is returned gradually from hexagon crystals pseudoparticles of original raw material as heating temperature is decreased.
(2) From removal of Zn, S and As, heating temperature is possible to decrease from 1573K to 1273K.
(3) Purity and magnetic properties of iron oxide have nearly no influence on magnetic properties of synthesised Mn_0.95Zn_0.05Fe₂O₄ ferrite.