Red mud as a substitute coloring agent for the hematite pigment

被引：41

作者：

Carneiro, J. ^{[1
]}

Tobaldi, D. M. ^{[1
]}

Hajjaji, W. ^{[2
]}

Capela, M. N. ^{[1
]}

Novais, R. M. ^{[1
]}

Seabra, M. P. ^{[1
]}

Labrincha, J. A. ^{[1
]}

机构：

[1] Campus Univ Santiago, Aveiro Inst Mat, Dept Mat & Ceram Engn CICECO, P-3810193 Aveiro, Portugal

[2] CERTE, Nat Water Treatment Lab, Soliman 2738020, Tunisia

来源：

CERAMICS INTERNATIONAL | 2018年 / 44卷 / 04期

关键词：

Bauxite residue; Dye; Waste valorization; Calcination; INFRARED-EMISSION SPECTROSCOPY; ALUMINUM (OXO)HYDROXIDES; ELECTRONIC-SPECTRA; CIRCULAR ECONOMY; CERAMIC INDUSTRY; BAUXITE RESIDUE; WASTE; DEHYDROXYLATION; TEMPERATURE; BOEHMITE;

D O I：

10.1016/j.ceramint.2017.11.225

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Red mud (RM), a highly alkaline iron oxide rich sludge obtained during the production of alumina, was treated to work as a coloring agent for ceramic glazes. The approach aims the valorization of this residue, adding environmental and economic value. RM was sintered at different temperatures (1100 degrees C, 1150 degrees C, 1200 degrees C, 1250 degrees C, 1300 degrees C and 1350 degrees C) to assess changes in its mineralogical composition. The obtained powders were characterized by XRD, UV Vis and CIELab. The samples were added to glazes (transparent, opaque and matte) and their color stability analyzed by CIELab. RM sintered at 1300 degrees C was compared with commercial hematite producing lower coloring power but yielding better color stability on glazes for temperatures of 1100 degrees C +/- 15 degrees C, thus presenting RM_1300C as a suitable substitute for the hematite pigment.

引用

页码：4211 / 4219

页数：9

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