Catalytic coal-tar decomposition to enhance reactivity of low-grade iron ore

被引：40

作者：

Cahyono, Rochim B. ^{[1
,2
]}

Rozhan, Alya N. ^{[1
]}

Yasuda, Naoto ^{[1
]}

Nomura, Takahiro ^{[1
]}

Hosokai, Sou ^{[1
]}

Kashiwaya, Yoshiaki ^{[3
]}

Akiyama, Tomohiro ^{[1
]}

机构：

[1] Hokkaido Univ, Ctr Adv Res Energy & Mat, Kita Ku, Sapporo, Hokkaido 0608628, Japan

[2] Gadjah Mada Univ, Dept Chem Engn, Bulaksumur 55281, Yogyakarta, Indonesia

[3] Kyoto Univ, Grad Sch Energy Sci, Dept Energy Sci & Technol, Sakyo Ku, Kyoto 6068501, Japan

来源：

FUEL PROCESSING TECHNOLOGY | 2013年 / 113卷

关键词：

Ore reduction; Tar decomposition; Carbonization; Ironmaking; PYROLYSIS TEMPERATURE; BIOMASS; GAS; GASIFICATION;

D O I：

10.1016/j.fuproc.2013.03.012

中图分类号：

O69 [应用化学];

学科分类号：

070301 [无机化学];

摘要：

Effective utilization of low-grade iron ore and coal can be one of the solutions for avoiding the high cost of raw materials and solving the problem of resource shortages in the steelmaking industry. This paper describes the behavior of reduction reaction during tar decomposition over low-grade iron ore. Pisolite ore, containing 5.9 mass% of combined water, was dehydrated at 450 degrees C to obtain porous ore. Tar vapor and pyrolysis gas of low-grade coal were introduced to porous ore for tar decomposition and carbon deposition. The iron ore effectively decomposed 22.1 mass% of tar component into gas product and deposited carbon at 600 degrees C. Besides tar decomposition, the ore was also reduced to magnetite and wustite by gas product which was produced from coal pyrolysis and tar decomposition. The reactivity of deposited carbon within ore was evaluated by reduction reaction using thermogravimetry method. The reduction of the carbon-deposited ore began at 750 degrees C, while that of the reference mixture. of Fe3O4 and coke began at 1100 degrees C. The carbon-deposited iron ore was more reactive because nanoscale contact between iron ore and carbon enhanced, reaction rate. These results revealed attractive utilization and reduction process of low-grade iron ore with coal tar decomposition. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：84 / 89

页数：6

共 25 条

[1]

Methodology to evaluate reduction limit of carbon dioxide emission and minimum exergy consumption for ironmaking [J].