The effect of hercynite on the phase structure and properties of magnesio-dolomite refractory materials was studied. The results showed that the hercynite improved the material's hydration resistance and mechanical properties by adjusting its microstructure;the calcium ferramenta's generated from the reaction between hercynite and free calcium oxide can form a chain-like structure enclosing magnesium oxide and free calcium oxide particles,reducing the volume expansion during the formation of calcium hydroxide particles;compared with traditional magnesio-dolomite refractory,the mechanical strength of refractory materials containing hercynite was improved by 35％,and its hardness was increased by 50％.
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