Electroslag remelting device with multiple annular consumable electrodes

The invention relates to an electroslag remelting device with multiple annular consumable electrodes. The electroslag remelting device comprises a crystallizer and the consumable electrodes. The consumable electrode is of a multi-ring structure and is composed of more than two electrode rings which are coaxially arranged, and the upper ends of the electrode rings are connected through an insulating fixer; the middle electrode ring is connected with a neutral line, and the other electrode rings are alternately connected with the live line and the neutral line from inside to outside. Single-point heat production during traditional electroslag remelting production is converted into multi-point heat production on a longitudinal section and circular ring heat production on a transverse section, so that a heating area is expanded; the temperature distribution of the electroslag bath is improved by utilizing the change of the geometric shape of the consumable electrode, so that the quality of an electroslag ingot pr