Cooling system of foundry sand and recovery treatment facilities of foundry sand

摘要

PROBLEM TO BE SOLVED: To provide a cooling device of casting sand (black sand) which can solve a problem (such as need of water piping or limitation of cooling power) due to water cooling or pressure feeding air cooling.;SOLUTION: A device for cooling casting sand (black sand) generated by cracking (disorganizing or crushing) a mold has heat exchanging bands Z1 and Z2 for cooling the black sand, and one end of the heat exchanging bands Z1 and Z2 is connected to a suction port of a suction type dust collector. The heat exchanging bands Z1 and Z2 are formed in a vertical direction, and ascending dust collecting air flow can be generated by the suction type dust collector being connected to the heat exchanging bands, and heat of the sand is exchanged by making the sand directly fluid contact with the ascending dust collecting air flow. The heat exchanging band is formed as a concurrent heat exchanging band Z1 that is formed with a lifter portion composed of an erect transport pipe that performs perpendicular pneumatic conveyance of the black sand and at the same time cools the black sand, or is formed as a countercurrent heat exchanging band Z2 that is formed with a multiple stage fluidized bed in which porous plates 7 having a number of pores with a radius which enables the sand to drop while forming a fluidized bed are arranged in a multiple stage in a vertical direction so that overflow gap portions can be alternately formed at one end.;COPYRIGHT: (C)2012,JPO&INPIT