Method and apparatus for sorting solids by airstream

An airstream solid sorting apparatus for sorting objects from unslender objects in crushed wastes in a dry state comprising:

• an upwardly flaring airstream sorting vessel into which a mixture of slender and unslender objects is supplied:
• a meshed screen tilted in a bottom of the airstream sorting vessel which permits the slender objects falling longitudinally in the direction in which gravity works to pass therethrough without permitting other larger objects to pass therethrough:
• a slender objects collecting vessel disposed below the meshed screen and having a port to supply a gas to agitate the mixture being sorted;
• an unslender objects outlet opening at a lower end of the tilted meshed screen in the airstream sorting vessel:
• an unslender objects sorting apparatus disposed alongside the airstream sorting vessel and an unslender objects collecting vessel disposed therebelow;
• the unslender objects sorting apparatus being made up of a gas supply cylinder into which a gas supply pipe from a blower opens, with an upper end of the gas supply cylinder being connected to an accelerating cylinder with a constricted interior, an upper end of the accelerating cylinder being, in turn, connected to a floating objects collecting cylinder having a larger cross-sectional area and an annular channel to discharge floating objects, and a lower end thereof being connected to an unslender objects discharge cylinder to discharge heavier unslender objects;
• a branch cylinder communicating with a gas inlet in the slender objects collecting vessel which is branched from the gas supply cylinder at a point higher than where the gas supply pipe opens into the gas supply cylinder;
• and
• an unslender objects outlet opening in the airstream sorting vessel and connected to the gas supply cylinder at a point where the branch cylinder opens.