Secondary separation device and method for crushed pellets at upper part of shot blasting machine

The invention discloses a secondary separation device and method for crushed pellets on the upper portion of a shot blasting machine, and relates to the technical field of shot blasting machines. The shot blasting machine circulating pipeline is fixedly mounted at the lower end of the separator; the broken shot collecting pipeline is fixedly installed at the lower end of the separator, and a feeding port of the broken shot collecting pipeline and a feeding port of the shot blasting machine circulating pipeline are located on the two sides of the bottom face of the separation cavity respectively; the feeding pipe is fixedly mounted at the upper end of the separator, and a discharging hole of the feeding pipe is communicated with the separation cavity and is positioned right above a feeding hole of the circulating pipeline of the shot blasting machine; the dust removal pipeline is fixedly mounted at the upper end of the separator, and a feeding hole of the dust removal pipeline is communicated with the separati