Manufacture of ceramics with high mechanical properties from red mud and granite waste
Author(s): |
I. Gonzalez-Triviño
J. Pascual-Cosp B. Moreno M. Benítez-Guerrero |
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Medium: | journal article |
Language(s): | Spanish |
Published in: | Materiales de Construccion, February 2019, n. 333, v. 69 |
Page(s): | 180 |
DOI: | 10.3989/mc.2019.03818 |
Abstract: |
Red mud (bauxite residue) is an alkaline suspension that is the by-product of alumina production via the Bayer process. Its elevated annual production and the global inventory of red mud determine its valorisation. Granite can be used as a source of fluxing oxides for the ceramic industry, as can the flake-shaped waste generated during the flaming of granite. In this work, a set of ceramic pieces made of red mud and granite waste are prepared and characterised via X-ray diffraction, a hardness test, electron scanning microscopy, a leaching test, and determining open porosity, water absorption, bulk density and flexural strength of the samples. The main crystalline phases in the high-temperature fired products are hematite, pseudobrookite and anorthite; the presence of magnetite reveals their ferrimagnetic character. All samples present high mechanical properties. Leaching results are below critical levels established by regulations. |
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data sheet - Reference-ID
10516868 - Published on:
10/12/2020 - Last updated on:
19/02/2021