Ferrite grade iron oxides from ore rejects

Rane, K.S.; Verenkar, V.M.S.; Sawant, P.Y.

dc.contributor.author	Rane, K.S.
dc.contributor.author	Verenkar, V.M.S.
dc.contributor.author	Sawant, P.Y.
dc.date.accessioned	2015-06-03T07:29:22Z
dc.date.available	2015-06-03T07:29:22Z
dc.date.issued	2001
dc.identifier.citation	Bulletin of Materials Science. 24(3); 2001; 331-338.	en_US
dc.identifier.uri	http://dx.doi.org/10.1007/BF02704931
dc.identifier.uri	http://irgu.unigoa.ac.in/drs/handle/unigoa/1248
dc.description.abstract	Iron oxyhydroxides and hydroxides were synthesized from chemically beneficiated high SiO2/Al2O3 low-grade iron ore (57(.)49 percent Fe2O3) rejects and heated to get iron oxides of 96-99(.)73 percent purity. The infrared band positions, isothermal weight loss and thermogravimetric and chemical analysis established the chemical formulas of iron-oxyhydroxides as gamma -FeOOH .0 .3H(2)O; alpha -FeOOH .0 .2H(2)O and amorphous FeOOH. The thermal products of all these were alpha -Fe2O3 excepting that of gamma -FeOOH .0 .3H(2)O which gave mainly gamma Fe2O3 and some admixture of alpha -Fe2O3. The hydrazinated iron hydroxides and oxyhydroxides, on the other hand, decomposed autocatalytically to mainly gamma -Fe2O3.Hydrazine method modifies the thermal decomposition path of the hydroxides, The saturation magnetization, J(s), values were found to be in the range 60-71 emu g(-1) which are close to the reported values for gamma -Fe2O3. Mechanism of the gamma -Fe2O3 formation by hydrazine method is discussed.	en_US
dc.publisher	Indian Academy of Sciences	en_US
dc.subject	Chemistry	en_US
dc.title	Ferrite grade iron oxides from ore rejects	en_US
dc.type	Journal article	en_US
dc.identifier.impf	y