The Effect of Thinning Agents on Rheological and Technological Properties of the Bauxite HCBS System

The Effect of Thinning Agents on Rheological and Technological Properties of the Bauxite HCBS System The thinning effect (deflocculation) in wet-ground highly concentrated composite suspensions (90% bauxite + 10% quartz glass) is studied. The thinning agents used are sodium tripolyphosphate, SB-5 organic plasticizer, and mixtures thereof. Maximum thinning effect is attained with a composite organic mineral additive (20 – 35% SB-5 + 65 – 80% sodium tripolyphosphate). Optimum concentration of the additive is found to be 0.08 – 0.1%, or 0.4 – 0.5 mg/m2 solid-phase surface. At optimum composition and additive concentration, the thixotropic dilatant flow regime of HCBS changes to a dilatant flow regime with a sharp decrease in viscosity and an increase in density of cast preforms. A mechanism for the thinning effect due to additives is considered. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Refractories and Industrial Ceramics Springer Journals

The Effect of Thinning Agents on Rheological and Technological Properties of the Bauxite HCBS System

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Publisher
Kluwer Academic Publishers-Plenum Publishers
Copyright
Copyright © 2003 by Plenum Publishing Corporation
Subject
Materials Science; Characterization and Evaluation of Materials; Materials Science, general; Ceramics, Glass, Composites, Natural Materials
ISSN
1083-4877
eISSN
1573-9139
D.O.I.
10.1023/A:1026356302096
Publisher site
See Article on Publisher Site

Abstract

The thinning effect (deflocculation) in wet-ground highly concentrated composite suspensions (90% bauxite + 10% quartz glass) is studied. The thinning agents used are sodium tripolyphosphate, SB-5 organic plasticizer, and mixtures thereof. Maximum thinning effect is attained with a composite organic mineral additive (20 – 35% SB-5 + 65 – 80% sodium tripolyphosphate). Optimum concentration of the additive is found to be 0.08 – 0.1%, or 0.4 – 0.5 mg/m2 solid-phase surface. At optimum composition and additive concentration, the thixotropic dilatant flow regime of HCBS changes to a dilatant flow regime with a sharp decrease in viscosity and an increase in density of cast preforms. A mechanism for the thinning effect due to additives is considered.

Journal

Refractories and Industrial CeramicsSpringer Journals

Published: Oct 17, 2004

References

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