Effect of MgO on Compressive Strength of Pellet

doi:-

Abstract

Abstract: The caustic calcined magnesite was used as an additive to produce an oxidized pellet. The effect of MgO-bearing on the compressive strength of pellet was investigated. The results showed that with the addition of MgO-bearing in pellet， the compressive strength of pellet decreases gradually. The reasons as follows:(1)the MgO makes against the recrystallization of Fe₂O₃ after Fe₃O₄ is oxidized to Fe₂O₃. The recrystallization of Fe₂O₃ is fainter， the crystallite is maldistributed and the consolidation of pellet is incomplete; (2)according to the pore space analysis of different MgO-bearing in pellets， with the addition of MgO-bearing in pellet， the porosity and aperture increase， leading to the decreasing of compressive strength of pellet.

Key words: oxidized pellet, compressive strength, microstructures, pore distribution, porosity

CLC Number:

TP274

GAO Qiang-jian， WEI Guo， HE Yi-bo， SHEN Feng-man. Effect of MgO on Compressive Strength of Pellet[J]. Journal of Northeastern University:Natural Science, 2013, 34(1): 103-106.

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