"In some industries, typically steelmaking, waste streams contain very fine particles, which exhibit a magnetic character and are often characterized as toxic. Regulations concerning environmental problems are becoming more stringent day by day, and the U.S. steel industry has encountered a severe problem with the use and or disposal of dusts and sludges resulting from steelmaking operations. In the past, such materials have been landfilled or stored in lagoons, although limited recycling for the recovery of metal values has been practiced. One of the major problems associated with the processing of these slurries is the separation of solids and liquids. This research deals with a novel, sequential, multi-stage, multi-force dewatering technique, which utilizes the synergistic application of magnetic, chemical and gravitational forces to slurries produced by the steel industry.
The results have illustrated that this technique, using a magnetic field, and a chemical flocculant with gravitational and vacuum forces, is capable of producing cakes containing 65-70% solids by weight from sludges with a pulp density of around 10% solids. In addition a very clean liquid can be produced, which may represent up to 90% of the original sludge volume. The flocculant dose rate and type, and magnetic field orientation, have been found to affect the dewatering process and an optimum set of process conditions have been determined. The technique has only been demonstrated on a small, batch, benchtop scale, but the results are very encouraging. Thus the dewatering process has considerable potential for the treatment of steelmaking sludges to permit more efficient disposal, storage or recycling"--Abstract, page iii.
Watson, John L.
Kohser, Ronald A.
Findley, Marshall E., 1927-1991
Materials Science and Engineering
M.S. in Metallurgical Engineering
University of Missouri--Rolla
xii, 63 pages
© 1989 Gautam Kumar Basu, All rights reserved.
Thesis - Restricted Access
Print OCLC #
Link to Catalog Record
Electronic access to the full-text of this document is restricted to Missouri S&T users. Otherwise, request this publication directly from Missouri S&T Library or contact your local library.http://merlin.lib.umsystem.edu/record=b2232551~S5
Basu, Gautam Kumar, "Multi-force synergistic dewatering of steelmaking sludges" (1989). Masters Theses. 804.
Share My Thesis If you are the author of this work and would like to grant permission to make it openly accessible to all, please click the button above.