Shredder dust treatment process

• Main Author: MURATA; KOZO
• Format: Patent
• Language: English
• Published: 11.07.2000
• Edition: 7
• Subjects: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT; DISPOSAL OF SOLID WASTE; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLIDMATERIALS OR FLUIDS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROMSOLID MATERIALS OR FLUIDS; PERFORMING OPERATIONS; RECLAMATION OF CONTAMINED SOIL SOIL; SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATICTABLES OR JIGS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS; SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATICTABLES OR JIGS; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TRANSPORTING

A preferred shredder dust treatment process which includes: (1) a step of executing a first crushing; (2) a step of separating and recovering metals from the first crushed product; (3) a step of a second crushing; (4) a step of separating and recovering metals from the second crushed product; (5) a step of executing a third crushing; (6) a step of collecting and recovering dust and the like by fluidizing the third crushed product to separate therefrom a fluffy dust and pneumatically transporting the separated fluffy dust to a dust collector; and (7) a step of separating and recovering non-ferrous metals, non-metals, and the like, from the third crushed product. Preferably, the shredder dust is crushed by crushers having square blades.