Dust solidification apparatus

A dust solidification apparatus comprising:

• a storage tank that stores dust;
• a forming member within the storage tank, the forming member having a forming hole;
• and
• a pressurizing rod that is configured to freely advance and withdraw with respect to the inside of the forming hole, wherein
• the pressurizing rod is made to advance into the forming hole to solidify dust filled therein, thereby obtaining a solidified substance,
• the forming hole has an entry section and a discharge section for the pressurizing rod and is in communication with the storage tank, and
• a stirring passage that is in communication between the discharge section and the storage tank in the outside of the discharge section, the stirring passage being configured to guide dust that is discharged from the discharge section by the entry of the pressurizing rod into the entry section, the dust that is discharged being guided in a direction different from the discharge direction of the dust that is discharged, the stirring passage being configured to stir the dust that is discharged,
• wherein the stirring passage comprises a return passage that includes
• a first guide wall that is configured to guide the dust that is discharged in a direction intersecting the discharge direction, and
• a second guide wall that surrounds the forming member and is configured to guide the dust that is guided in the intersecting direction in a direction opposite the discharge direction.