Magnetic coagulation and reaction rate for the aqueous ferrite formation reaction

被引：43

作者：

Gokon, N

Shimada, A

Kaneko, H

Tamaura, Y

Ito, K

Ohara, T

机构：

[1] Tokyo Inst Technol, Res Ctr Carbon Recycling & Utilizat, Meguro Ku, Tokyo 1528552, Japan

[2] Natl Res Inst Met, Tsukuba Magnet Lab, Tsukuba, Ibaraki 3050003, Japan

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2002年 / 238卷 / 01期

关键词：

aqueous ferrite formation reaction; high magnetic field; magnetic coagulation; magnetic separation and reaction rate;

D O I：

10.1016/S0304-8853(01)00703-X

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The aqueous ferrite formation reaction with addition of Fe(II) and Fe(111) ions in an alkaline solution in a high magnetic field has been investigated at iron ion concentrations of 150, 750 and 1500 ppm and at Fe(II)/Fe(III) mole ratio of 1 (chemical composition of the stoichiometric Fe3O4) and 2/1 (chemical composition of GR-I In the case of 2 Fe(II)/Fe(III) = 1/2, the magnetic coagulation reaction occurring in the magnetic field range of 0-1 T is different from that in the range of 2-10 T. The higher magnetic field enhanced the reaction rate of the aqueous ferrite formation due to the increase in the intermediate concentration at Fe(II)/Fe(III) = 2/1. The increase in the initial reaction rate can be explained in terms of the increase in the nucleus numbers in the nuclei formation period. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：47 / 55

页数：9

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