US 12,117,242 B2
Furnace for producing secondary battery cathode material and method for firing secondary battery cathode material
Keeyoung Jung, Pohang-si (KR); Choongmo Yang, Seoul (KR); Yoon Cheol Park, Pohang-si (KR); Soon Cheol Hwang, Pohang-si (KR); Yeong Woo Kim, Pohang-si (KR); and Young Min Park, Pohang-si (KR)
Assigned to POSCO HOLDINGS INC., Seoul (KR); RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY, Pohang-si (KR); and POSCO FUTURE M CO., LTD., Pohang-si (KR)
Appl. No. 17/415,851
Filed by POSCO HOLDINGS INC., Seoul (KR); RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY, Pohang-si (KR); and POSCO FUTURE M CO., LTD., Pohang-si (KR)
PCT Filed Dec. 19, 2019, PCT No. PCT/KR2019/018097
§ 371(c)(1), (2) Date Jun. 18, 2021,
PCT Pub. No. WO2020/130669, PCT Pub. Date Jun. 25, 2020.
Claims priority of application No. 10-2018-0165659 (KR), filed on Dec. 19, 2018.
Prior Publication US 2022/0065534 A1, Mar. 3, 2022
Int. Cl. F27B 9/24 (2006.01); F27B 9/04 (2006.01); F27B 9/30 (2006.01); F27D 7/02 (2006.01); F27D 17/00 (2006.01); H01M 4/505 (2010.01); H01M 4/525 (2010.01); H01M 10/0525 (2010.01); H01M 4/02 (2006.01)
CPC F27B 9/3077 (2013.01) [F27B 9/045 (2013.01); F27D 7/02 (2013.01); F27D 17/002 (2013.01); H01M 4/505 (2013.01); H01M 4/525 (2013.01); H01M 10/0525 (2013.01); F27D 2007/026 (2013.01); H01M 2004/028 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A furnace for producing a secondary battery cathode material, the furnace comprising:
a chamber of which the internal space is heated by a heater;
a conveyer installed in the chamber and conveying a sagger containing raw material power of a cathode material of a secondary battery in one direction; and
a gas supply nozzle and an exhaust port installed in the chamber,
wherein the chamber includes
a front chamber including a temperature-increasing section, a rear chamber including a temperature-maintaining section, and an intermediate chamber positioned between the front chamber and the rear chamber and separating the front chamber and the rear chamber, and
the intermediate chamber has an inlet shutter and an outlet shutter for sealing the internal space thereof, and the exhaust port of the intermediate chamber is connected to an exhaust device for discharging gas, and
wherein the intermediate chamber includes a gas supply nozzle, and the gas supply nozzle supplies dry air or oxygen into the intermediate chamber after the gas in the intermediate chamber is discharged,
wherein the inlet shutter and the outlet shutter are controlled not to be simultaneously opened, whereby gas in the front chamber is prevented from diffusing into the rear chamber.