2015-Sustainable Industrial Processing Summit
SIPS 2015 Volume 3: Takano Intl. Symp. / Metals & Alloys Processing
| Editors: | Kongoli F, Noldin JH, Mourao MB, Tschiptschin AP, D'Abreu JC |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2015 |
| Pages: | 550 pages |
| ISBN: | 978-1-987820-26-3 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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The Influence of the Mixing Step Evaluation on the Iron Ore Agglomeration Process
Priscilla Pereira1;1, Guarapari, Brazil;
Type of Paper: Regular
Id Paper: 200
Topic: 3
Abstract:
Samarco is a Brazilian mining company, which produces iron ore pellets of high quality for the global steel industry. The production process is fully integrated and performed in two industrial units. The mixing step has a paramount importance so as to ensure the quality and final physical chemistry of fired pellets. In this study, a deep investigation was performed regarding the influence of the mixing stage over agglomeration process. The main objective was to evaluate the influence of the mixing process in the physical and chemical quality of the fired pellets. Based on that, a design of experiment (including different mixing times, binders, mixers, etc) was performed in order to find out the best set of parameters which will consequently impact the quality of the final product. The pellet feed and all the raw material (coal, limestone and binder) were collected in the industrial plant. Based on the experiment, pilot-scale tests were conducted to simulate the mixing, agglomeration and firing step (Pot Grate). The mixing efficiency was defined statistically comparing the values of chemical results of the material collected at different points of the samples. This mix was agglomerated in pilot disc, where the green pellet characteristics were compared. The firing stage was also carried out with the green balls, in order to get the best set of parameters. The information obtained from the study provided the best way of operation of mixers and generated information for future investment projects at Samarco.
Keywords: mixing, mixers, balling, pelletizing.