Aluminum ash treatment method and device

The invention provides an aluminum ash treatment method and device, and the method comprises the steps: carrying out size mixing on aluminum ash by adopting water, carrying out solid stabilization treatment on the obtained size under an alkaline condition, and carrying out first solid-liquid separation to obtain a high-aluminum material and a first liquid phase; at least part of the first liquid phase is subjected to a dealumination reaction, and a second liquid phase and a first precipitation product are obtained after second solid-liquid separation; sequentially contacting the second liquid phase with a deamination reagent for a first reaction, contacting with an oxidant for a second reaction and contacting with a calcium compound for a third reaction, respectively obtaining a third liquid phase and a second precipitation product through third solid-liquid separation, and crystallizing the third liquid phase to respectively obtain a crystallized product and a fourth liquid phase, and returning the fourth li