Dilatometric Characterization of Direct Reduction Pellets
Journal Title: International Journal of engineering Research and Applications - Year 2017, Vol 7, Issue 10
Abstract
During the reduction process, the increase in volume of the iron ore pellets leads to a decrease in the mechanical resistance or disintegration of the pellets which lead to the unfeasibility of the process. The present work has the objective of evaluating the thermal expansion behavior of the direct reduction pellets using dilatometry. For this, the dilatometric expansion curve and the coefficient of thermal expansion of the pellets were determined through a horizontal pushrod dilatometer under an argon atmosphere. The dilatometric results showed that the expansion of the pellet increased and the degree of expansion decreased as the temperature increased, and changes in the expansion curve demonstrated the occurrence of microstructural transformations due to the presence of MgO and SiO2 in the composition of the pellet. The pellets were submitted to thermal cycles with a gradual increase of temperature up to 600°C, 900°C, 1000°C and 1050°C, which presented similar results of coefficient of expansion and made it possible to relate the dilatometric results with the compressive strength of the pellets, which intensified with material expansion to the temperature of 1000°C and showed significant loss of strength when exhibited shrinkage in the temperature range of 1000-1050°C
Authors and Affiliations
Evandro Virgolino Gonçalves, Daiane Cardial, Gláucio Soares da Fonseca, José Adilson de Castro
Keywords
Related Articles
- EP ID EP392506
- DOI 10.9790/9622-0710014853.
- Views 92
- Downloads 0
Review of an Effective Dynamic Vibration Absorber for a Simply Supported Beam and Parametric Optimization to Reduce Vibration Amplitude
In this work theoretical natural frequencies and mode shape of the simply supported beam type main vibrating system ie used in many areas like bridges and double-beam structures is determined. Dynamic vibration absorber...
Improved Aodv Routing Protocol with Efficient Qos for Wireless Mesh Network
Wireless Mesh Network (WMN) Is Emerging Concept In Wireless Networks Supporting Broadband An And High Speed Multimedia Services, So Network Must Guaranteed The Quality-Of-Services (Qos). This Paper Proposed, A New Qos-Aw...
Detecting Skin Disease by Accurate Skin Segmentation Using Various Color Spaces
Skin diseases which may be of the bacterial, fungal, allergies, enzyme etc. are very harmful for the skin and can spread throughout if not detected accurately as early as possible. So becomes necessary to detect the type...
Solar PV array reconfiguration using Ant Colony Optimisation for maximum power extraction under partial shading conditions
The role of Renewable energy resources is important in the India’s power sector. Due to the rapid increasing energy demand, PV (Photovoltaic) power is becoming a leading source of electrical energy. PV array suffers from...
Experimental Analysis on Properties of Concrete with Partial Replacement of Cement with Stone Dust
Due to the auspicious attribute of concrete such as durability, availability, versatility, good compressive strength, it is one of the most commonly used Building materials throughout the world. The demand for infrastruc...