Study on softening-dropping properties of double layer carbon-bearing pellet
The softening-dropping properties of the double layer carbon-bearing pellet in which the inner was a carbon-bearing pellet and the outer was refined iron-mineral powder were studied.The results showed that the pellet had a slight expansion first, and then had two rapid shrinkage processes with temperature increasing.When the ratio of the amount of substance C to O was 2∶3, the softening start temperature of the pellet was about 30 ℃ higher than that of the ordinary pellet, but their softening end temperature had little difference.When the ratio of the amount of substance C to O was 1∶1, the softening end temperature of the pellet was about 30 ℃ higher than that of the ordinary pellet, but their softening start temperature had little difference.Both melting start temperature and the dropping start temperature of the pellet were low under the same carbon content.
double layer carbon-bearing pelletsoftening propertymelting propertyiron joined crystal
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