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Beneficiation of Low-Grade Dilband Iron Ore by Reduction Roasting

Authors :
Ali Dad Chandio
Iftikhar Ahmed Channa
Asif Ahmed Shaikh
Shabbir Madad
Syed Bilal Hasan Rizvi
Aqeel Ahmed Shah
Jaweria Ashfaq
Muhammad Ali Shar
Abdulaziz Alhazaa
Source :
Metals, Vol 13, Iss 2, p 296 (2023)
Publication Year :
2023
Publisher :
MDPI AG, 2023.

Abstract

This research is aimed at the up-gradation of indigenous Pakistani iron ore, i.e., Dilband iron ore (hematite), by utilizing common metallurgical processes. First, the magnetic properties of the ore were determined. Initially, the iron ore samples contained 34 wt. % Fe in addition to other gangue materials. Therefore, the ore was subjected to a high-temperature reduction roasting process between 800 °C and 1000 °C. Additionally, the magnetic separation process was also employed. The influence of different roasting parameters, such as the reduction time, coal-to-ore ratio, and temperature, was examined. This was followed by characterization techniques using XRD (X-ray diffraction analysis), the Rietveld method, wet chemistry analysis, and a VSM (Vibrating Sample Magnetometer). The results suggest an excellent reduction at 900 °C for a coal/ore ratio of 20 wt. %, which was achieved within 2 h of the process. The Fe concentration increased tremendously from 34 to 56 wt. %, and in conjunction, magnetic properties were also induced (1.5 emu). The recovery was found to be substantial for the ore when the Fe content was 75 wt. %. Additionally, the economic feasibility of the processed ore was also studied, followed by an extensive analysis of the roasting and magnetic separation processes.

Details

Language :
English
ISSN :
20754701
Volume :
13
Issue :
2
Database :
Directory of Open Access Journals
Journal :
Metals
Publication Type :
Academic Journal
Accession number :
edsdoj.919875c552604320809fa0b91b1cafa3
Document Type :
article
Full Text :
https://doi.org/10.3390/met13020296