Resources Recycling (자원리싸이클링)

The Korean Institute of Resources Recycling (한국자원리싸이클링학회)
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Research of Dry Reduction Process of Waste Tin Oxide using Methane

메탄가스를 이용한 폐주석산화물의 건식환원시스템

  • Hyun-Chul, Jung (Research & Devlopment Centre, ELSYS.Co,Ltd.) ;
  • Se-Kwon, Kim (Division of Smart Convergence Technology, Suncheon National University) ;
  • Sang-Yeol, Kim (Research & Devlopment Centre, Shintech.Co.Ltd,)
  • 정현철 ((주)엘시스 부설연구소) ;
  • 김세권 (순천대학교 IT융합공학부) ;
  • 김상열 (신테크(주) 기술연구소)
  • Received : 2022.09.01
  • Accepted : 2022.09.21
  • Published : 2022.12.31
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Abstract

Dry reduction using natural gas was proposed to recover tin from waste tin oxide generated in a tin bath that was used for controlling the smoothness of architectural glass during production, and the reduction behavior was investigated. The utilized vertical natural gas dry reduction system is capable to process 4 L or 20 kg depending on input raw materials. The system was established by applying the upper intake and lower discharge method. The recovery rate was 97.2% at 800 ℃ and 4 sccm flow rate and increased with the amount of input gas. Hydrogen accounted for 23% of the discharge gas, showing a 16.6% hydrogen conversion rate. The reaction behavior of tin recovered via natural gas reduction provides basic data on the new waste resource reduction/recovery technology.

건축용 유리생산공정에서 유리의 평활도 제어를 위한 주석욕조에서 발생하는 폐주석 산화물로부터 천연가스를 이용하여 주석을 회수하는 건식환원공정을 제안하고 환원거동을 고찰하였다. 천연가스 건식환원시스템은 20kg급 연속생산 수직형 반응로로 상부취입, 하부토출 방식으로 시스템을 정립하였다. 모든 반응온도 조건에서 투입가스량이 증가할수록 회수율이 높아지는 결과를 얻었으며, 800℃, 4sccm 조건에서 97.2%의 회수율을 보였다. 반응가스분석결과 23%의 수소를 확인하였으며, 16.6%의 메탄가스 수소전환율을 보였다. 천연가스 환원 주석의 환원반응을 고찰함으로써 폐자원 환원/회수기술 정립에 대한 기초자료를 정립하였다.

Keywords

References

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