Proceedings of the IEEK Conference (대한전자공학회:학술대회논문집)
- 2001.10a
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- Pages.144-148
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- 2001
Improvement of color for iron oxide from waste pickling acid
- Sohn, Jin-Gun (Research Institute of Industrial Science & Technology) ;
- Kim, Dae-Young (Research Institute of Industrial Science & Technology) ;
- Lee, Jae-Young (Research Institute of Industrial Science & Technology) ;
- Lee, Hun-Ha (Research Institute of Industrial Science & Technology) ;
- Kim, Jang-Su (Pohang Iron & Steel Co.) ;
- Sung, Gee-Woong (Pohang Iron & Steel Co.)
- Published : 2001.10.01
Abstract
In this study, to improve the color of iron oxide from waste pickling acid at the cold rolling mill, quality control technologies to improve color were investigated. During operation of the spray roaster, the charge amount of waste acid per hour, temperature, and numbers of spray nozzles were investigated. At the admixing process, titanium oxide, silica, and goethite were tested. The color character of iron oxide can be improved by process control of the spray roaster and the admixing process at a pigment factory. Iron oxide from this study is appropriate for use as a colorant of a concrete product.