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
drying to obtain green bodies of carbon bricks. The surfaces of the green bodies of the carbon bricks are uniformly sprayed or brushed with a layer of
slurry and dried, and the green bodies of the carbon bricks are subjected to
thermal insulation in an
air atmosphere at 1,150 to 1,250 DEG C for 12 to 24h, thereby obtaining the electrically calcined coal-based carbon brickwith high
thermal conductivity and high
corrosion resistance. The electrically calcined coal-based carbon
brick has the
advantage of low cost and is easy to industrially produce, and the prepared products have high strength, high
thermal conductivity and excellent property of resisting
corrosion of
liquid iron.