Resourceful treatment method and system for lead-zinc smelting water-quenched slag

The invention relates to a resourceful treatment method and a resourceful treatment system for lead-zinc smelting water-quenched slag, and the treatment method comprises the following steps: increasing the content of various metal elements, especially iron element, in filtrate by using sulfuric acid in a circulating acid leaching manner, and simultaneously separating out calcium and silicon in the water-quenched slag; and then sequentially extracting an iron element, an aluminum-iron mixture and a trace element mixture through three times of step-by-step concentration and crystallization to respectively obtain industrial products, such as calcium sulfate, hydrogel, iron oxide powder, an aluminum ferric sulfate flocculant and metal mineral powder, which can be directly used in subsequent fields. According to the method, the comprehensive utilization rate of the water-quenched slag is high, the degree of'eating dry and squeezing clean 'is achieved, the obtained elements or the mixture can serve as raw materials