Method for realizing self-balance of sulfate radicals of electric zinc smelting system

The invention relates to the technical field of zinc hydrometallurgy in nonferrous metallurgy technology, in particular to a method for realizing self-balance of sulfate radicals of an electric zinc smelting system, which comprises the following steps: controlling the contents of manganese ions, potassium ions and sodium ions in the electric zinc smelting system; when the content of sulfate radicals is less than 300g/L, controlling roasting of the zinc concentrate in a first temperature range, and controlling the content of soluble sulfur in the roasted ore to be 3.0-4.5%; and when the sulfate radical content is larger than 320 g/L, the zinc concentrate roasting is controlled to be within the second temperature range, and the soluble sulfur content of the roasted ore is controlled to be 1.5%-3.0%. Aiming at the composition of sulfate radicals of an electric zinc smelting system, under the condition of ensuring normal control of zincic acid, the contents of manganese ions, potassium ions and sodium ions are co