Method and apparatus for removing sand from castings

Details Method and apparatus for removing sand from castings Method and apparatus for removing sand from castings

1980-03-03

1981-12-01

Caroff, Marc L.

Cleaning and liquid contact with solids

Processes

Including regeneration, purification, recovery or separation...

134 251, 134109, 164 5, B08B 302, B08B 704

Patent

active

043034535

ABSTRACT:
In a hydro-jet housing the form block, possibly with core, is stripped of mold sand by means of a high-pressure water jet. The sand is fed in the form of a muddy pulp to a first hydrocyclone, where the water is largely separated and is supplied for the formation of new muddy pulp. The sand flows into a scrubbing mechanism for knocking off its binding material, which has settled as a coat around the sand grains. After being scrubbed, the sand is fed to a second hydrocyclone for hydro-extracting water and dislodged binding material from the sand. The sand is then dried and cooled and is available for further use. The contaminated water is neutralized with flue gas, after which a flocculation agent is added to it and the water is then purified for reuse in a settling tank and possibly in a filter.

REFERENCES:
patent: 2331102 (1943-10-01), Bird
patent: 2783511 (1957-03-01), Will et al.
patent: 2784468 (1957-03-01), Booth et al.
patent: 3147212 (1964-09-01), Koppen et al.
patent: 3446349 (1969-05-01), Benzon
patent: 4070274 (1978-01-01), Bryson
patent: 4133747 (1979-01-01), Visman
patent: 4144088 (1979-03-01), Adams
patent: 4260009 (1981-04-01), Noble

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