Research of Dry Reduction Process of Waste Tin Oxide using Methane

Hyun-Chul Jung; Se-Kwon Kim; Sang-Yeol Kim

doi:10.7844/kirr.2022.31.6.18

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2022 Vol.31, Issue 6 Preview Page Next Page

Research Paper

Research of Dry Reduction Process of Waste Tin Oxide using Methane 메탄가스를 이용한 폐주석산화물의 건식환원시스템

31 December 2022. pp. 18-24

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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 °C 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.

Keywords

recycling

dry reduction

natural gas reduction

waste tin

hydrogen production 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, 하부 토출 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.

키워드

리싸이클링

건식환원

천연가스 환원공정

폐주석산화물

수소생산

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Information

Publisher :The Korean Institute of Resources Recycling
Publisher(Ko) :한국자원리싸이클링학회
Journal Title :Resources Recycling
Journal Title(Ko) :자원리싸이클링
Volume : 31
No :6
Pages :18-24
Received Date : 2022-09-01
Revised Date : 2022-09-19
Accepted Date : 2022-09-21
DOI :https://doi.org/10.7844/kirr.2022.31.6.18

Resources Recycling ISSN:2765-3439(Print) 2765-3447(Online) 자원리싸이클링

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