US 11,904,386 B2
Casting ladle for casting aluminum alloy
Xin Liang, Qinhuangdao (CN)
Assigned to CITIC Dicastal Co., Ltd., Qinhuangdao (CN)
Appl. No. 17/775,459
Filed by CITIC Dicastal Co., Ltd., Qinhuangdao (CN)
PCT Filed Oct. 20, 2020, PCT No. PCT/CN2020/122014
§ 371(c)(1), (2) Date May 9, 2022,
PCT Pub. No. WO2021/212781, PCT Pub. Date Oct. 28, 2021.
Claims priority of application No. 202010331534.8 (CN), filed on Apr. 24, 2020.
Prior Publication US 2023/0050493 A1, Feb. 16, 2023
Int. Cl. B22D 41/02 (2006.01)
CPC B22D 41/02 (2013.01) 10 Claims
OG exemplary drawing
 
1. A casting ladle for casting aluminum alloy, comprising a liner contact layer, a first thermal insulation layer, a second thermal insulation layer, and a housing layer sequentially from inside to outside, wherein:
the first thermal insulation layer comprises first Al2O3 particles and at least one first oxide particle selected from the group consisting of first SiO2 particles, first CaO particles, and first MgO particles, wherein the first Al2O3 particles have a hollow spherical structure, a proportion of the first Al2O3 particles is 80-85 wt % based on a total weight of the first thermal insulation layer, and the first thermal insulation layer has a porosity of 55-65% and a pore size of 0.8-3.0 mm; and
the second thermal insulation layer comprises at least one second oxide particle selected from the group consisting of second Al2O3 particles, second SiO2 particles, second CaO particles, and second MgO particles, wherein the second thermal insulation layer has a porosity of 60-75% and a pore size of 2-5 mm.