Recycling of Hematite Fine Waste by Pelletisation
Abstract
A large volume of by-products and residues is generated during iron and steel production. Much of these represents valuable materials and can be recovered and recycled inside the flow of integrated steel plants. The fine-grained residues, which are rich in iron, are usually recycled through sinter plants. This study aims at investigating the potential of palletization of two types of hematite fine waste resulted from process of chemical pickling of steel strip. The pelletizing tests were performed in an experimental disc pelletizer. The hematite was mixed with different fluxing and binding agents. The green pellets were then dried, sintered and cooled. The effect of materials mixtures on the physical and chemical characteristics of pellets was determined and analyzed in relation with nature of pelletized components.
References
[2]. Jatuphaksamphan Y., Phinichka N., Prapakorn K., Supradist M., Pickling kinetics of tertiary oxide scale formed on hot-rolled steel strip, Journal of Metals, Materials and Minerals, vol. 20, no. 1, p. 33-39, 2010.
[3]. Quaranta N., Caligaris M., López H., Unsen M., Pelozo G., Pasquini J., Cristóbal A., Reuse of red powder of steel plants as fine addition in ceramic bricks manufacture, WIT Transactions on Ecology and The Environment, vol. 155, 2012.
[4]. Regel-Rosocka M., A review on methods of regeneration of spent pickling solutions from steel processing, Journal of Hazardous Materials, vol. 177, p. 57-69, 2010.
[5]. Baerhold F., Mitterecke S., Acid recovery in the steel and metallurgical industry - process characteristics and fuel saving options, IMPC 2016: XXVIII International Mineral Processing Congress Proceedings.
[6]. Zaspalis V., Kolenbrander M., Design principles for sprayroasted iron oxides for the manufacturing of ferrites, Powder Technology, vol. 161, p. 169-174, 2006.
[7]. Woon H. S., Lim K.P., Puteri N., Rozaimah R., Tan C. Y., Synthesis and characterization of hot-roll and cold-roll byproductderived strontium hard ferrites, American J. of Engineering and Applied Sciences, 2 (4), p. 580-583, 2009.
[8]. Eisele T. C., Kawatra S. K., A review of binders in iron ore pelletization, Miner. Process. Extr. Metall. Rev, 24, p. 1-90, 2003.
[9]. Pal J., Utilization of Microfines in Iron and Steel Making, Steel World, p. 86-90, June 2016.
[10]. Halt J. A., Komar Kawatra S., Review of Organic Binders for Iron Ore Agglomeration, 2013.
[11]. Socalici A., Heput T., Ardelean E., Ardelean M., Ferrous waste processing by pelletizing, briquetting and mechanically mixed, International Journal of Energy and Environment, issue 4, vol. 5, p. 532-540, 2011.
