Device and assembly for metal extraction and separation

The invention belongs to the field of metal recovery, and provides a device and assembly for metal extraction and separation. The device comprises a box and multiple partition plates sequentially arranged in the length direction of the box. The box is divided by the multiple partition plates into a liquid inlet trough, a mixing trough, a mixed flow layering trough and a liquid collection trough, all of which are sequentially connected. An extraction agent and metal liquid are contained in the liquid inlet trough, liquid flow is formed in the mixing trough through mixing, and therefore extraction is started, then layering is carried out on the mixed flow layering trough, finally an upper liquid collection chamber and a lower liquid collection chamber in the liquid collection trough carry out collection, extraction liquid and raffinate are separated, and the aim of extraction is achieved. The device assembly comprises multiple devices connected in series to achieve metal extraction and separation, and the multi