Phase changes in the lining of reactors used for carbon black production
Heat Technology
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Conclusions
Magnesite-chromite refractories used for lining carbon reactors are seriously damaged, apparently as a result of volume changes taking place in the variable oxidation-reduction atmospheres, and also as a result of the hydration of magnesia by water vapors. The causes of failure require further investigation.
High-alumina refractories in these conditions have considerably higher resistance.
During service, high-alumina refractories are saturated with oxides of iron, magnesium, calcium, silicon and alkalis, which react with them and confer zonal structures connected with new mineral formations. In the working zone of these refractories there is intense formation of mullite.
Keywords
Iron Calcium Silicon Magnesia Hydration
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© Consultants Bureau 1966