US 12,227,819 B2
Method and apparatus for recovering copper, bronze and lead from mixture of copper oxide, tin oxide and lead oxide
Jei Pil Wang, Busan (KR)
Assigned to PUKYONG NATIONAL UNIVERSITY INDUSTRY-UNIVERSITY COOPERATION FOUNDATION, Busan (KR)
Appl. No. 17/436,031
Filed by PUKYONG NATIONAL UNIVERSITY INDUSTRY—UNIVERSITY COOPERATION FOUNDATION, Busan (KR)
PCT Filed Mar. 5, 2019, PCT No. PCT/KR2019/002525
§ 371(c)(1), (2) Date Sep. 2, 2021,
PCT Pub. No. WO2020/179943, PCT Pub. Date Sep. 10, 2020.
Claims priority of application No. 10-2019-0025107 (KR), filed on Mar. 5, 2019.
Prior Publication US 2022/0002837 A1, Jan. 6, 2022
Int. Cl. C22B 5/12 (2006.01); C22B 7/00 (2006.01); C22B 13/02 (2006.01); C22B 25/02 (2006.01)
CPC C22B 5/12 (2013.01) [C22B 7/001 (2013.01); C22B 13/02 (2013.01); C22B 25/02 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method for recovering copper, bronze and lead from a mixture of copper oxide, tin oxide and lead oxide, the method comprising:
placing a mixture of copper oxide, tin oxide and lead oxide inside a reactor;
raising a temperature inside the reactor;
introducing a reducing gas into the reactor and heat-treating the mixture at 700 to 900° C. to separate and recover solid copper and molten bronze; and
recovering vaporized lead through a recovery line connected to an upper end of the reactor;
wherein recovering the lead through the recovering line includes:
cooling and depositing the vaporized lead;
dust-collecting a portion of lead that is not deposited in the depositing step; and
recovering a portion of lead that is not collected in the dust-collecting step.