Low-carbon microporous magnesia carbon brick and preparation method thereof

The invention discloses a low-carbon microporous magnesia carbon brick and a preparation method thereof, the magnesia carbon brick comprises the following main materials by weight: 30-40 wt% of magnesium powder, 10-20 wt% of graphite powder, 15-20 wt% of alumina silicate fiber, 5-10 wt% of alumina powder, 1-3 wt% of iron oxide powder, 5-10 wt% of silicon carbide powder, and 5-10 wt% of titanium carbide powder; the magnesia carbon brick comprises the following auxiliary materials by weight: 05-1wt% of a modified polycarboxylic acid water reducer, 5-8wt% of modified epoxy resin and 2-5wt% of an epoxy resin curing agent. The modified polycarboxylate superplasticizer and the modified epoxy resin are added into the magnesia carbon brick, the compactness between molecules of the formed magnesia carbon brick is increased, the toughness and strength of the low-carbon microporous magnesia carbon brick are effectively improved, after the modified epoxy resin is added, a modified resin film is formed between micropores