Title : ( Recovery of iron from low-grade hematite ore using coal-based direct reduction followed by magnetic separation )
Authors: Naghdali Alavi fard , Hossein Shalchian , Ali Rafsanjani , Jalil Vahdati Khaki , Abolfazl Babakhani ,
دانلود فایل برای اعضای دانشگاهAccess to full-text not allowed by authors
Abstract
In the present work, iron recovery from a low-grade hematite ore (containing less than 40% iron), which is not applicable in common methods of ironmaking, was studied. Non-coking coal was used as reducing agent. Reduction experiments were performed under various coal to hematite ratios and temperatures. Reduction degree was calculated using the gravimetric method. Reduced samples were subjected to magnetic separation followed by X-ray diffraction analysis. Total iron content, degree of metallization and recovery efficiency in magnetic part were determined by quantitative chemical analysis, which were obtained about 82%, 95% and 64% respectively under optimal conditions. CaO as an additive improved ore reducibility and separation efficiency. The microstructure of reduced samples and final products were analyzed by scanning electron microscopy. Final product with a high degree of metallization can be used in steel making furnaces and charging of blast furnaces which can improve production efficiency and decrease coke usage.
Keywords
, Low-grade iron ore, Coal-based direct reduction, Sponge iron, Lime, Magnetic separation
@article{paperid:1062222,
author = {Alavi Fard, Naghdali and Shalchian, Hossein and Rafsanjani, Ali and Vahdati Khaki, Jalil and Babakhani, Abolfazl},
title = {Recovery of iron from low-grade hematite ore using coal-based direct reduction followed by magnetic separation},
journal = {Iranian Journal of Materials Science and Engineering},
year = {2016},
volume = {13},
number = {3},
month = {September},
issn = {1735-0808},
pages = {60--71},
numpages = {11},
keywords = {Low-grade iron ore; Coal-based direct reduction; Sponge iron; Lime; Magnetic separation},
}
%0 Journal Article
%T Recovery of iron from low-grade hematite ore using coal-based direct reduction followed by magnetic separation
%A Alavi Fard, Naghdali
%A Shalchian, Hossein
%A Rafsanjani, Ali
%A Vahdati Khaki, Jalil
%A Babakhani, Abolfazl
%J Iranian Journal of Materials Science and Engineering
%@ 1735-0808
%D 2016
