Dry method selective solid material two-stage separation device

A dry method selective solid material two-stage separation device belongs to the technical field of gravity separation process separation of materials. A first stage separation unit is composed of a fluidized separation bed, wherein an air delivery main pipe connected with a blower is connected with the fluidized separation bed through an air delivery branch pipe; a second stage separation unit is composed of a cyclone separator. The outlet of the bottom of the fluidized separation bed is connected with a high-density material storage bunker, the outlet of the top of the fluidized separation bed is connected with the cyclone separator, the lower outlet of the cyclone separator is connected with the high-density material storage bunker, the upper portion of the cyclone separator is connected with a low-density material storage bunker, and the top of the low-density material storage bunker is connected with a variable frequency induced draft fan through a gas conveying pipeline. The dry method selective solid material two-stage separation device can separate solid mixed materials through a physical method in a dry state, can maintain intrinsic physicochemical properties of the materials, and enables the separated materials to be further used. The whole separation process has an optimal environment-friendly effect. Besides, the dry method selective solid material two-stage separation device is simple in structure and easy to operate and manage, does not need any other separating medium, and is low in costs and applicable to the separation of a majority of materials with different densities.