Rate-enhancement effect of CO in magnetite concentrate particle reduction by H2+CO mixtures

被引：8

作者：

Fan, Deqiu ^{[1
]}

Elzohiery, Mohamed ^{[1
]}

Mohassab, Yousef ^{[1
]}

Sohn, H. Y. ^{[1
]}

机构：

[1] Univ Utah, Dept Met Engn, Salt Lake City, UT 84112 USA

来源：

IRONMAKING & STEELMAKING | 2021年 / 48卷 / 09期

关键词：

Flash ironmaking; drop-tube reactor; reduction kinetics; CO+H-2 mixture; CFD; Rate expression‌ ‌ High temperaure; magnetite particles; ECONOMIC-FEASIBILITY ANALYSIS; IRON-OXIDE REDUCTION; DROP-TUBE REACTOR; HYDROGEN REDUCTION; FLOWSHEET DEVELOPMENT; PROCESS SIMULATION; KINETIC-ANALYSIS; NATURAL-GAS; HEMATITE; IRONMAKING;

D O I：

10.1080/03019233.2021.1915645

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The kinetics of the reduction of magnetite concentrate particles by H-2+CO mixtures have been investigated in drop-tube reactors (DTRs) to obtain rate expressions for the design of novel flash ironmaking reactors. The experimental temperature varied from 1423 K (1150 degrees C) to 1873 K (1600 degrees C). The H-2/CO ratio was varied from 0.5 to 2, which is the typical composition range of the product gas from the partial oxidation of natural gas. The experimental data were analysed separately in two temperature ranges 1423 K (1150 degrees C)-1623 K (1350 degrees C) and 1623 K (1350 degrees C)-1873 K (1600 degrees C), as the magnetite concentrate particles tend to fuse and melt at temperatures above 1623 K (1350 degrees C) changing the reduction mechanism. CFD (Computational Fluid Dynamics) simulations were used to more accurately account for temperature and concentration variations. Synergistic effects were observed in the reduction by H-2+CO mixtures compared with the simple summation of contributions of the individual component gases.

引用

页码：1064 / 1075

页数：12

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