The invention relates to the technical field of submerged arc furnaces, in particular to a preparation method of a bottom
electrode of a direct-current submerged arc furnace and the direct-current submerged arc furnace. The preparation method of the bottom
electrode of the direct-current submerged arc furnace comprises the steps that
petroleum coke and
pitch coke are evenly mixed and then smashed into the three-level particle size, a binder is added, bidirectional
compression molding is conducted at the preset temperature, and the bottom
electrode of the direct-current submerged arc furnace is obtained; meanwhile,
mechanical vibration with the preset frequency is applied, the pressure gradient is gradually increased, pressure maintaining is conducted for the first duration, and a formed blank is obtained; carrying out gradient
roasting on the molded
green body and carrying out heat preservation for a second time to obtain a graphitized electrode
green body; and immersing the graphitized electrode blank into the modified
asphalt of the dipping tank, carrying out vacuum pressurization and pressure maintaining, and then directly transferring the electrode blank to the bottom of the
direct current submerged arc furnace for secondary
roasting to obtain the bottom electrode of the
direct current submerged arc furnace. The
heat control and anti-scouring performance of the bottom electrode of the direct-current submerged arc furnace is optimized.