Cleaning sand used at foundry
AssigneeFinn Recycling Oy
InventorsJukka Nieminen, Timo Kronqvist, Toni Wesin
Life of this patent
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Abstract
An apparatus and a method for cleaning sand used at a foundry, wherein sand to be cleaned is screened by a screening apparatus. The screened sand and at least one liquid mixture is fed into an abrasive apparatus. After that, the screened sand is rubbed by the abrasive apparatus. The rubbed sand and at least one liquid mixture is added to a water separation screen for separating a water blend from the rubbed sand. Finally, the separated sand is transferred into an oven and cleaned thermally by rotating the separated sand in the heated oven.
Claims22
A method for cleaning sand used at a foundry, the method comprising:
- screening sand to be cleaned by a screening apparatus;
- feeding the screened sand and at least one first liquid mixture into an abrasive apparatus;
- rubbing the screened sand by the abrasive apparatus;
- adding the rubbed sand and at least one second liquid mixture to a water separation screen;
- separating a water blend from the rubbed sand;
- feeding the water blend from the water separation screen to a fine separation process for forming a water mixture and an aqueous mixture;
- adding the water mixture from the fine separation process into the abrasive apparatus and to the water separation screen;
- adding the aqueous mixture into the abrasive apparatus and/or to the water separation screen;
- transferring the separated sand into an oven;
- and
- cleaning the separated sand thermally by rotating the separated sand in the heated oven.
An apparatus for cleaning sand used at a foundry, the apparatus comprising:
- a screening apparatus,
- an abrasive apparatus,
- a water separation screen,
- an oven;
- wherein the apparatus is configured to:
- screen sand to be cleaned by the screening apparatus;
- feed the screened sand and at least one first liquid mixture into the abrasive apparatus;
- rub the screened sand by the abrasive apparatus;
- add the rubbed sand and at least one second liquid mixture to the water separation screen;
- separate a water blend from the rubbed sand;
- feed the water blend from the water separation screen to a fine separation process for forming a water mixture and an aqueous mixture;
- add the water mixture from the fine separation process into the abrasive apparatus and to the water separation screen;
- add the aqueous mixture into the abrasive apparatus and/or to the water separation screen;
- transfer the separated sand into the oven;
- and
- clean the separated sand thermally by rotating the separated sand in the heated oven.
A non-transitory computer program product that comprises computer program code stored on a computer-readable medium, the computer code being executable to perform operations using an apparatus for cleaning sand used at a foundry, the apparatus comprising a screening apparatus, an abrasive apparatus, a water separation screen, and an oven;
- wherein the operations are configured to control the apparatus to at least:
- screen sand to be cleaned by the screening apparatus;
- feed the screened sand and at least one first liquid mixture into the abrasive apparatus;
- rub the screened sand by the abrasive apparatus;
- add the rubbed sand and at least one liquid mixture to the water separation screen;
- separate a water blend from the rubbed sand;
- feed the water blend from the water separation screen to a fine separation process for forming a water mixture and an aqueous mixture;
- add the water mixture from the fine separation process into the abrasive apparatus and to the water separation screen,
- add the aqueous mixture into the abrasive apparatus and/or to the water separation screen;
- transfer the separated sand into the oven;
- and
- clean the separated sand thermally by rotating the separated sand in the heated oven when said computer program code is executed in a computer.
Dependencies are inferred from the claim text.