US 12,305,919 B2
Metal melting apparatus, screen plate for metal melting, and method of melting metal
Kiyata Mochizuki, Shizuoka (JP); and Tomihiro Iwamoto, Shizuoka (JP)
Assigned to TOUNETSU CO., LTD., Shizuoka (JP)
Appl. No. 17/637,345
Filed by TOUNETSU CO., LTD., Shizuoka (JP)
PCT Filed Nov. 10, 2020, PCT No. PCT/JP2020/041950
§ 371(c)(1), (2) Date Feb. 22, 2022,
PCT Pub. No. WO2021/095731, PCT Pub. Date May 20, 2021.
Claims priority of application No. 2019-207478 (JP), filed on Nov. 15, 2019; application No. 2019-207479 (JP), filed on Nov. 15, 2019; and application No. 2019-207480 (JP), filed on Nov. 15, 2019.
Prior Publication US 2022/0307768 A1, Sep. 29, 2022
Int. Cl. C22B 9/16 (2006.01); F27B 3/04 (2006.01); F27B 3/19 (2006.01); F27B 3/22 (2006.01); F27D 3/14 (2006.01); F27D 27/00 (2010.01)
CPC F27B 3/045 (2013.01) [C22B 9/16 (2013.01); F27B 3/19 (2013.01); F27B 3/22 (2013.01); F27D 3/14 (2013.01); F27D 27/00 (2013.01); F27D 2027/002 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A method of melting metal comprising:
disposing, in a melt, a screen plate for metal melting in a form of a plate having a multitude of through holes so that a melt containing an unmolten melt raw material having a lower specific gravity compared with the melt is supplied on a bottom side of the screen plate for metal melting disposed in the melt, and
melting the unmolten melt raw material by holding the unmolten melt raw material in the melt using the screen plate so as not to come up to a melt surface until the unmolten melt raw material reaches a size to pass through the through holes, and then by allowing the unmolten melt raw material to melt, when reached the size to pass through the through holes, until it surfaces through the melt.