Pouring method for large-section consumable electrode

The invention relates to a pouring method for a large-section consumable electrode. The pouring method comprises the requirement that an electrode blank is frustum-shaped, the diameter of the lower end is smaller than that of the upper end, and the height is 2000-6000mm; the length of an ingot mould is 38-42mm larger than that of the electrode blank, the inner diameter of an upper opening of the ingot mould is 815-835mm, and the inner diameter of a lower opening is 805-825mm; and the steel type of a steel ingot is any one of S44SY, H13 and TSM166. The pouring method includes the following steps in order that I, the pouring temperature is 60-80 DEG C higher than that of a liquid phase wire, argon sealing protection is adopted in pouring, and the temperature of the ingot mould is 50-100 DEG C; II, composite slag is poured in a protection mode in the protection slag pouring process with the adding quantity being 15.6-16.4 kg/piece; III, a heat generating agent is gently added when the portion of a rise with 0.64-0.70 of the weight of the riser is poured in the riser pouring process, and the adding quantity is 11.8-12.2 kg/piece; and IV, the pouring time of an ingot body is 16-19min, and the pouring time of the riser is 7-10min. The pouring method for the large-section consumable electrode reduces the working procedure of rolling or forging and reduces production cost.