대만(臺灣)의 EAF 더스트(전기로(電氣爐) 제강소진(製鋼紹塵))의 처리(處理)에 관하여

Abstract

대만의 제강생산량은 21,290천톤이고, 전기로제강량은 제강생산량의 약 반, 즉 11,200천톤이다. 그리고 이 전기로 제강시 발생되는 더스트량은 160천톤(2009년도)이다. Walcz 프로세스(탄소강 EAF 더스트)에서 약 70천톤, RHF/SAF 프로세스(스테인레스강 EAF 더스트)에서 약 60천톤을 처리하고 있다. 그리고 약 90천톤/년의 조산화아연(ZnO)이 생산되고 있는 것으로 추정된다. 현재 새로운 EAF 더스트 리싸이클링법이 개발되고 있고, 조산화아연의 품위향상이 앞으로 과제이다. Taiwan's annual steel production reached 21.29 million tons. EAF accounted for about half of this total, or 11.2 million tons in 2008. The other 10.09 million tons came from blast furnace and converter process methods. The annual EAF carbon steel production is about 9.76 million tons, and the quantity of dust generated from the EAF process is 160 thousand tons, or about 16kg of dust per ton of steel was produced. In 2009, there is Walez process for carbon steel EAF dust recycling, and the capacity is about 70,000 tons per year; and there is RHF/SAF process for stainless steel EAF dust, the capacity is 60,000 tons per year which is enough to treat stainless steel EAF dust in Taiwan. There are many new treatment facilities processes will be that introduced to recycle the EAF dust in the near future, these processes will perform smoothly and successfully in Taiwan. The estimation of recycled crude ZnO is about 90,000 tons each year. The recycling and upgrading crude zinc oxide will be the next important issue in Taiwn zinc and steel industry.