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Title: Development of value-added products from alumina industry mineral wastes using low-temperature-setting phosphate ceramics

Abstract

A room-temperature process for stabilizing mineral waste streams has been developed, based on acid-base reaction between MgO and H3PO4 or acid phosphate solution. The resulting waste form sets into a hard ceramic in a few hours. In this way, various alumina industry wastes, such as red mud and treated potliner waste, can be solidified into ceramics which can be used as structural materials in waste management and construction industry. Red mud ceramics made by this process were low-porosity materials ({approx}2 vol%) with a compression strength equal to portland cement concrete (4944 psi). Bonding mechanism appears to be result of reactions of boehmite, goethite, and bayerite with the acid solution, and also encapsulation of red mud particles in Mg phosphate matrix. Possible applications include liners for ponds and thickned tailings disposal, dikes for waste ponds, and grouts. Compatability problems arising at the interface of the liner and the waste are avoided.

Authors:
; ;
Publication Date:
Research Org.:
Argonne National Lab., IL (United States). Energy Technology Div.
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
228508
Report Number(s):
ANL/ET/CP-88519; CONF-9606172-1
ON: DE96010812
DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Conference
Resource Relation:
Conference: 4. international alumina quality workshop, Darwin (Australia), 2-7 Jun 1996; Other Information: PBD: Jan 1996
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; ALUMINIUM OXIDES; WASTE PRODUCT UTILIZATION; MINERAL INDUSTRY; ALUMINIUM ORES; LINERS; BAUXITE

Citation Formats

Wagh, A S, Jeong, Seung-Young, and Singh, D. Development of value-added products from alumina industry mineral wastes using low-temperature-setting phosphate ceramics. United States: N. p., 1996. Web.
Wagh, A S, Jeong, Seung-Young, & Singh, D. Development of value-added products from alumina industry mineral wastes using low-temperature-setting phosphate ceramics. United States.
Wagh, A S, Jeong, Seung-Young, and Singh, D. Mon . "Development of value-added products from alumina industry mineral wastes using low-temperature-setting phosphate ceramics". United States. https://www.osti.gov/servlets/purl/228508.
@article{osti_228508,
title = {Development of value-added products from alumina industry mineral wastes using low-temperature-setting phosphate ceramics},
author = {Wagh, A S and Jeong, Seung-Young and Singh, D},
abstractNote = {A room-temperature process for stabilizing mineral waste streams has been developed, based on acid-base reaction between MgO and H3PO4 or acid phosphate solution. The resulting waste form sets into a hard ceramic in a few hours. In this way, various alumina industry wastes, such as red mud and treated potliner waste, can be solidified into ceramics which can be used as structural materials in waste management and construction industry. Red mud ceramics made by this process were low-porosity materials ({approx}2 vol%) with a compression strength equal to portland cement concrete (4944 psi). Bonding mechanism appears to be result of reactions of boehmite, goethite, and bayerite with the acid solution, and also encapsulation of red mud particles in Mg phosphate matrix. Possible applications include liners for ponds and thickned tailings disposal, dikes for waste ponds, and grouts. Compatability problems arising at the interface of the liner and the waste are avoided.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1996},
month = {1}
}

Conference:
Other availability
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