Electrically calcined coal-based carbon brick with high thermal conductivity and high corrosion resistance and preparation method thereof

The invention relates to an electrically calcined coal-based carbon brick with high thermal conductivity and high corrosion resistance and a preparation method thereof. According to the technical scheme, 8 to 16wt% of microwave treated electrically calcined coal fine powder, 10 to 25wt% of alpha-Al2O3 micro powder, 4 to 8wt% of silicon powder, 1 to 4wt% of aluminum titanium alloy powder and 2 to 4wt% of high temperature pitch are used as substrates, 50 to 65wt% of microwave treated electrically calcined coal particles are used as aggregate, and thermoset phenolic resin accounting for 10-20wt%of the sum of the substrates and the aggregate is additionally added. The preparation method comprises the following steps: mixing the substrates to obtain substrate fine powder; then putting the aggregate into a mixing mill and performing mixed milling, then adding the thermoset phenolic resin and performing mixed milling; finally adding the substrate fine powder and performing mixed milling; andperforming moulding and d