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Improvement of Color for Iron Oxide from Waste Pickling Acid  

손진군 (포항산업과학연구원 자원활용연구팀)
금대영 (포항산업과학연구원 자원활용연구팀)
이재영 (포항산업과학연구원 자원활용연구팀)
이훈하 (포항산업과학연구원 자원활용연구팀)
Publication Information
Resources Recycling / v.11, no.5, 2002 , pp. 24-29 More about this Journal
Abstract
In this study, to improve the color of iron oxide from waste pickling acid at the cold rolling mill, the quality control technologies especially about color were investigated on the spray roaster and iron oxide powder. At the operation condition of the spray roaster, the charge amount of waste acid per hour, temperature, numbers of spray nozzle were investigated. At admixing process, titanium oxide, silica, goethite were tested. Color character of iron oxide can be improved by process control at spray roaster and by admixing process at a pigment factory Iron oxide from results of this study is enough to use as the colorant of concrete product.
Keywords
iron oxide; colorant; waste acid; spray roaster;
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