Methods for Converter Sludge Dehydration Intensification

International Conference on Construction, Architecture and Technosphere Safety 2017

土木建筑工程

Vakhromeev, M.I.^1 ; Moreva, Y.A.^1 ; Starkova, L.G.^1

Department of Real Estate Management and Civil Engineering, Nosov Magnitogorsk State Technical University, Lenina str., 38, Magnitogorsk

455000, Russia^1

关键词: Complex operations;    Dehydrated sludges;    Dehydration process;    Humidity reductions;    Iron and steel works;    Metallurgical companies;    Sintering process;    Treatment technologies;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/262/1/012180/pdf
DOI  :  10.1088/1757-899X/262/1/012180

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

The article considers the intensification methods for converter sludge dehydration exemplified by the sludges of the Oxygen Converter Workshop (OCW) of the Open Joint-Stock Company "Magnitogorsk Iron and Steel Works" (MMK, OJSC), one of the largest metallurgical companies in the Southern Urals. Converter sludges can contain up to 45-70% of ferrum [21] which is interesting in terms of their use as an addition to a sinter-feed mixture. Sludge intensifies the sintering process. It positively influences pelletizing and fusion mixture melting dynamics at sintering. Over the period of the converter sludge dehydration complex operation at the OCW, MMK, OJSC, it was revealed that processing results in obtaining of high humidity sludge. It causes sludge freezing during the winter period, thus, its transportation involves extra costs for sludge warming up. To resolve the above-mentioned problem, the following works were performed in 2016: - experimental studies of how the application of the low-molecular anionic flocculate "SEURVEY" FL-3 influences sludge humidity reduction. - experimental studies of how the filtering press process operation parameters influence sludge humidity reduction. The new flocculate application didn't lower the dehydrated sludge humidity (the objective was the humidity of not more than 15%). Basing upon the conducted research results, we can make a conclusion that putting into operation the sewage water reactant treatment technology with the use of "SEURVEY", FL-3 (H-10) is not recommended. The research of the influence the filtering press process parameters have on the dehydration process intensification demonstrated that reaching of the obtained residue humidity value lower than 15% is possible under the reduction of the filtering press chamber depths to 30 mm and with the application of additional operation "Residue drying" with compressed air. This way of the sludge dehydration problem resolving at filtering presses of the converter sludge dehydration complex of the OCW, MMK, OJSC, can be recommended for application.