Method for recycling zinc from zinc leaching slag cleaning solution

The invention discloses a wet process for recycling zinc from a zinc leaching slag cleaning solution, belonging to wet processing methods for zinc ore, in particular relating to a method for further recycling zinc from zinc slag generated by a zinc hydrometallurgy system. The method comprises the following steps of: washing leaching slag or rinsing the leaching slag with dilute acid; then preparing an organic phase by taking P204 as an extractant and kerosene as a diluent to extract a water phase; preparing a solution containing zinc and sulphuric acid; eluting impurities in the loaded organic phase; back-extracting the loaded organic phase with waste electrolyte and sulphuric acid; shifting zinc in the organic phase into a water phase again; carrying out deoiling treatment on all water phases in contact with the organic phase; and finally, adding a back-extracted solution as a new solution into a zinc electrodeposition system. The method has the advantages of simplicity of operation and high metal recovery rate, can effectively recycle zinc included in the zinc leaching slag so as to save resources and avoide environment pollution, and can be well linked with a zinc hydrometallurgy process so that the recovery rate of zinc is increased.