Doctoral Dissertations


Zhicheng Li


“There are several problems that inflict modem metallurgical industries, including increasing environmental constraints, diminishing resources, and the inefficient utilization of energy. Increasingly stringent environmental regulations require the metallurgical industry to reduce and recycle waste products. The ability to effectively dewater metallurgical wastes is often a severe limitation in recycling due to the fine particle size of the materials, which may blind the filter medium. Waste streams from steelmaking plants frequently fall into this category.

The use of magnetic forces to enhance the dewatering of steelmaking sludge has previously been demonstrated to have potential. This dissertation details the extension of magnetic vacuum filtration to a laboratory disk filter, and subsequently to an industrial vacuum disk filter. Also, mathematical models and a simulation system have been established to describe the magnetic vacuum filtration process. The design of the laboratory disk filter and the evaluation of magnetic field strengths and gradients are described, and results are presented for the treatment of steelmaking and magnetite pulps. The modification of an industrial disk filter is then detailed and results presented for tests on the dewatering of finely ground magnetite.

A graphical simulation system in conjunction with mathematical models has been developed to describe cake morphology for given magnetic feed materials under the influence of external magnetic field. The simulation system can also give approximate filtering performance for a given dewatering case. Fine particle movement under an external magnetic field is studied using Metropolis Monte Carlo simulation. The simulations help design magnetic dewatering facilities for the treatment of steelmaking sludge, and predict the dewatering efficiencies for a given application”--Abstract, page iii.


Watson, John L.

Committee Member(s)

O'Keefe, T. J. (Thomas J.)
Robertson, D. G. C.
Wilson, John W.
Wilkerson, Ralph W.


Materials Science and Engineering

Degree Name

Ph. D. in Metallurgical Engineering


University of Missouri--Rolla

Publication Date

Fall 1999


xiii, 120 pages

Note about bibliography

Includes bibliographical references (pages 114-119).


© 1999 Zhicheng Li, All rights reserved.

Document Type

Dissertation - Restricted Access

File Type




Thesis Number

T 7700

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.

Share My Dissertation 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.