US 12,583,030 B2 · Regeneration treatment method of waste shell-mold and system thereof

Abstract

A regeneration treatment method of waste shell-mold and a system thereof are provided. The regeneration treatment method has a raw smashing step, a smashed-particle sieving step smashed-particle, a first magnetic separation step, a grinding step, a second magnetic separation step, a dry pneumatic flotation step, and a vibration sieving step in sequence to obtain a regenerated shell-mold sand. The refined shell-mold sand is obtained from the smashed-particle sieving step. Silica binders of the refined shell-mold sand is effectively removed by the grinding step. Furthermore, particle sizes of the regenerated shell-mold sand fall in a suitable range in the grinding step. Magnetic metals mixed in the waste shell-mold are effectively removed by the first and second magnetic separation steps. Non-magnetic impurity are further removed by the dry pneumatic flotation step. Therefore, the regenerated shell-mold sand are suitable to substitute original shell-mold sand.

Claims20

Dependent claims

A regeneration treatment method of waste shell-mold comprising steps of:

(a) raw smashing waste shell-molds into raw shell-mold sand;
(b) sifting out refined shell-mold sand from the raw shell-mold sand, wherein particle sizes of the refined shell-mold sand fall within a first particle size range;
(c) removing magnetic metal particles mixed in the refined shell-mold sand;
(d) whirling and grinding the refined shell-mold sand by colliding with each other to remove silica binders adhered to surfaces of the refined shell-mold sand to obtain a shell-mold sand granular material;
(e) removing magnetic metal powders mixed in the shell-mold sand granular material;
(f) removing non-magnetic impurity mixed in the shell-mold sand granular material during the shell-mold sand granular material being blown by an airflow to separate regenerated shell-mold sand from the shell-mold sand granular material;
and
(g) rolling the regenerated shell-mold sand on a metal sieve to remove dust adsorbed on the regenerated shell-mold sand by the static electricity and to collect the regenerated shell-mold sand remaining on the metal sieve.

5 more elements

A regeneration treatment system of waste shell-mold comprising:

a smasher for smashing waste shell-molds into raw shell-mold sand;
a sieving machine connected to the smasher for receiving the raw shell-mold sand obtained from the smasher and for sifting out refined shell-mold sand from the raw shell-mold sand;
wherein particle sizes of the refined shell-mold sand fall within a first particle size range;
a first magnetic separator connected to the sieving machine for receiving the refined shell-mold sand sifted out by the sieving machine and for removing magnetic metal particles mixed in the refined shell-mold sand;
a grinder connected to the first magnetic separator, comprising at least one grinding chamber for receiving and whirling the refined shell-mold sand, wherein the refined shell-mold sand are ground by colliding to each other in the at least one grinding chamber to remove silica binders adhered to surfaces of the refined shell-mold sand and to obtain a shell-mold sand granular material;
a second magnetic separator connected to the grinder for receiving the shell-mold sand granular material and for removing magnetic metal powders mixed in the shell-mold sand granular material;
a dry pneumatic flotation machine connected to the second magnetic separator, comprising a floatation chamber for receiving the shell-mold sand granular material, for removing non-magnetic impurity particles mixed in the shell-mold sand granular material, and for blowing away non-magnetic impurity powders mixed in the shell-mold sand granular material by an airflow in the flotation chamber to obtain regenerated shell-mold sand;
and
a rotary vibration sieving machine connected to the dry pneumatic flotation machine, comprising a metal sieve for receiving the regenerated shell-mold sand, and for rolling the regenerated shell-mold sand on the metal sieve to remove dust adsorbed on the regenerated shell-mold sand by the static electricity and to collect the regenerated shell-mold sand remaining on the metal sieve.

6 more elements

Dependencies are inferred from the claim text.

Regeneration treatment method of waste shell-mold and system thereof

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Regeneration treatment method of waste shell-mold and system thereof

Life of this patent

Abstract

Claims20