Masters Theses


Upal Roy


"The replacement of traditional smelting processes in the non-ferrous smelter industry, with new energy efficient and environmentally acceptable processes, combined with the need to maximize recoveries, has increased the need for slag treatment. Several approaches are available on a commercial basis, and the selection of any one approach will depend on a number of factors. This research deals with a novel, hydrometallurgical approach to recovering the primary non ferrous metal values from lead blast furnace slag.

The results have illustrated that a two stage leach is necessary for recovering the zinc and lead from the slag. This two stage leach produced a zinc/iron solution and a lead solution and the former was then treated by solvent extraction which was aimed at separating the zinc and the iron present in the leach liquor. This separation was enhanced by using metallic zinc as a reductant in a low concentration sulfuric acid strip solution to reduce and strip the ferric iron from Di (2 - ethylhexyl) phosphoric acid which was used as the solvent extractant. The effects of temperature, acid concentration, ultrasound leaching, extractant concentration, pH, stripping time, stripping volume, phase ratio and nitrogen sparging were examined. An optimum set of process conditions for maximizing the zinc concentration in the pregnant solution has been determined"--Abstract, page iv.


Watson, John L.

Committee Member(s)

O'Keefe, T. J. (Thomas J.)
Wiebe, Henry Allen


Materials Science and Engineering

Degree Name

M.S. in Metallurgical Engineering


Special thanks are also due to the Department of Metallurgical Engineering, University of Missouri--Rolla for awarding the author a research fellowship, which was funded by the Missouri Mining and Mineral Resources Institute.


University of Missouri--Rolla

Publication Date

Summer 1990


xvi, 113 pages

Note about bibliography

Includes bibliographical references (pages 111-112).


© 1990 Upal Roy, All rights reserved.

Document Type

Thesis - Restricted Access

File Type




Thesis Number

T 6102

Print OCLC #


Link to Catalog Record

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