The invention relates to the technical field of magnesia carbon
brick refractory materials, in particular to a low carbon magnesia carbon
brick and a preparation method thereof. The technical proposal comprises the following steps: mixing 58 to 70 weight percent of
magnesite grains, 20 to 28 weight percent of
magnesite fine powder, 0.5 to 5 weight percent of expansion
graphite, 0 to 6 weight percent of crystalline
flake graphite, 1 to 5 weight percent of
antioxidant, 0.1 to 5 weight percent of
metal fibre and 1.5 to 4.5 weight percent of phenolic resin; and molding and
drying the mixture to prepare a low carbon magnesia carbon
brick of which carbon content is between 2 and 7 percent. The low carbon magnesia carbon brick prepared by the invention has the advantages of low heat
expansion rate, good scale resistant performance, good high temperature strengthen, good
thermal shock resistant performance, good
toughness and
corrosion resistance, and the brick is not easy to fracture when using.