[Problem] To provide a molding sand reclamation method and reclamation system for effectively separating magnetically attracted matter from molding sand.

[Solution] To provide a molding sand reclamation method comprising removing metal powder and metal pieces by magnetic separation with a first magnetic flux density and removing magnetically attracted matter by magnetic separation with a second magnetic flux density higher than the first magnetic flux density from molding sand S separated from a casting by shot blasting, and removing by dry mechanical reclamation, from the molding sand, substances including carbonized matter adhered to the surface of the molding sand.

[Problem] To reclaim molding sand that has been discharged from green sand casting equipment, using only dry mechanical reclamation.

[Solution] A method comprising a step of measuring a water content and a magnetized matter content of molding sand discharged from green sand casting equipment; a step of comparing the measured water content with a first control value, and if the water content exceeds the first control value, drying the molding sand until the water content becomes equal to or less than the first control value; a step of comparing the measured magnetized matter content with a second control value, and if the magnetized matter content exceeds the second control value, magnetically separating the molding sand until the magnetized matter content becomes equal to or less than the second control value; thereafter, a step of reclaiming the molding sand by dry mechanical reclamation until a loss-on-ignition becomes equal to or less than a third control value; and a step of classifying the molding sand until a total clay content becomes equal to or less than a fourth control value.

Die Erfindung betrifft ein Verfahren zum Regenerieren von Gießereisand, insbesondere für die erneute Herstellung von Gießereiformen und/oder Gießereiformkernen aus dem regenerierten Gießereisand, durch Entfernen von Bindemittel aus einem Gießereisand- Bindemittelgemisch, unter Verwendung eines, bevorzugt saugfähigen, festen Trägermittels (6), wobei Bindemittel und Trägermittel (6) von dem Gießereisand getrennt werden. Erfindungsgemäß ist vorgesehen, das Trägermittel (6) mit dem Gießereisand-Bindemittelgemisch in Kontakt gebracht, bevorzugt diesem zugesetzt, und gemeinsam mit dem an diesem anhaftenden und/oder in diesem aufgenommenen Bindemittel von dem Gießereisand getrennt wird.

To provide an apparatus for reclaiming foundry sand that has a fluidized bed that prevents slits from being clogged. The apparatus comprises a tank (3) for reclaiming the foundry sand, a tank (4) for fluidization, an upper portion of which in an upstream side is connected to a bottom of the tank for reclaiming the foundry sand, the tank for fluidization transporting the reclaimed foundry sand and fine powder that drop from the tank for reclaiming the foundry sand, a dust hood (5), and a lower portion of which communicates with an upper portion of the tank for fluidization in a downstream side, the dust hood collecting the fine powder in the tank for fluidization, wherein a fluidized bed (6) in the tank for fluidization has a plurality of inverted V-shaped covering members (13) and a plurality of V-shaped flooring members (14), wherein the inverted V-shaped covering members and the V-shaped flooring members are horizontally and alternately provided so that the inverted V-shaped covering members are at any point above a vertically corresponding point of the V-shaped flooring members, and wherein gaps between end portions of the inverted V-shaped covering members and end portions of the V-shaped flooring members are formed as inclined slits (15) for supplying air.