Direct-current four-electrode industrial silicon submerged arc furnace and production process

The invention relates to the technical field of industrial silicon submerged arc furnaces, in particular to a direct-current four-electrode industrial silicon submerged arc furnace and a production process thereof.The silicon submerged arc furnace comprises a furnace body, furnace charge is arranged in the furnace body, and the furnace charge comprises silica and carbonaceous materials located at the furnace bottom and the furnace wall of the furnace body and used as reducing agents; the four electrodes are all located in the furnace body and vertically inserted into the furnace material, the four electrodes are arranged in a rectangular shape, so that all corners are 90 degrees, a main loop from the end faces of the electrodes to carbonaceous materials at the furnace bottom, metal aggregates in the furnace material and the electrodes and a main loop from the ends of the electrodes to carbonaceous materials at the furnace bottom and carbonaceous materials from the electrodes to carbonaceous materials at the f