Method for smelting ultralow-carbon ultralow-silicon hastelloy by utilizing hastelloy scrap

The invention discloses a method for smelting ultralow-carbon ultralow-silicon hastelloy by using hastelloy scrap, which comprises the following steps: a, EAF electric furnace smelting: adding lime, carbon balls, hastelloy scrap, ferrosilicon and fluorite into an EAF electric furnace for smelting in parts by mass to obtain a product A; b, EAF electric furnace tapping: conducting tapping after the mass percent of silicon in the product A is 0.3%-0.7% and the mass percent of carbon in the product A is 1.5%-2.5% to obtain a product B; c, performing vacuum degassing treatment on the product B to obtain a product C after the mass percent of hydrogen in the product B is smaller than 2 ppm, the mass percent of nitrogen in the product B is smaller than 100 ppm; d, adding the product C into an AOD furnace for smelting at the smelting temperature of 1500-1580 DEG C, conducting tapping, and adding 20-80 parts of aluminum ingots along with steel flow during tapping to obtain a product D; and f, refining the product D in