Evaluation of aluminum dross waste as raw material for refractories

Yoshimura, Humberto Naoyuki; Abreu, Ana Paula; Molisani, André Luiz; Camargo, A. C. de; Portela, J.C.S.; Narita, N. E.

doi:10.1016/j.ceramint.2006.12.007

Cited by 106 publications

(27 citation statements)

References 13 publications

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“…Many small aluminum recycling companies do not treat the generated aluminum dross and it is usually confined in landscapes in incandescent state allowing the metallic aluminum to oxidize, therefore this kind of byproduct has a high alumina content (1) . Aluminum dross has been used in several applications, such as reinforcing material in aluminum-dross composites (2) synthesis of spinel (3) by solid-state reaction with MgO, synthesis of SiAlON (4) and carbothermal reduction and nitridation process, as raw material for the preparation of refractory (5), manufacture of calcium aluminate cement (6) synthesis of Mg-Al, Ca-Al and Zn-Al type LDH S (7) using HCl and NaOH solutions. The high amount of alumina in the dross makes this waste a suitable material for the synthesis of several kinds of ce ramics, in particular as a raw material for the synthesis of some cements.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and mechanical properties of a calcium sulphoaluminate cement made of industrial wastes

et al. 2014

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Environmentally-friendly calcium sulphoaluminate clinkers were obtained from a mixture of aluminium dross, fluorgypsum, fly ash and CaCO 3 at temperatures within the range of 1100 to 1400 °C. After the heat treatments Ca 4 Al 6 O 12 SO 4 was the main phase. Three different cements were prepared using the clinkers synthesized at 1250, 1350 and 1400 °C; the clinker powders were mixed with 20 wt% of hemihydrate. Cement pastes were prepared using a water/cement ratio (w/c), 0.4 followed by curing at 20 or 40 °C for periods of time ranging from 1 to 28 days. Most of the samples showed high compression strengths 40-47 MPa after 28 days, which were comparable to the strength of Portland cement. Ettringite was the main hydration product and its morphology consisted of acicular and hexagonal plates, which is typical of this phase.

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Section: Introductionmentioning

confidence: 99%

Synthesis and mechanical properties of a calcium sulphoaluminate cement made of industrial wastes

et al. 2014

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“…As stated above, aluminium powder is one of typical bloating agent which is used in the production of refractory material [2], Al-Al2O3 composite [3], and aluminate cement [4]. The reaction between aluminium and water, catalyzed by NaOH, has been elaborated in the previous studies [5][6], as shown in the following equation: From Eq.…”

Section: Introductionmentioning

confidence: 99%

Analysis of aluminum base-reaction effect in density, porosity, and thermal insulation of porous fire bricks

Firmansyah¹,

Meidianto²,

Widayatno³

et al. 2018

AIP Conference Proceedings

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Abstract.This paper reports the effect of aluminium corrosion reaction on the density, porosity, and thermal insulation capability of porous fire bricks. The reaction between aluminium and alkaline solution produces hydrogen and other sediment products. The test specimens of fire bricks were made from the mixture of castable cement, aluminium powder of 325 mesh in size (0, 0.1, 1, and 2 wt% with respect to castable cement), and 0.185 M KOH solution. The structural examination of the specimens shows the increase of porosity to 22.7 -30.6% and the decrease of density in the range of 1.135-1.503 g/mL. In addition, the samples possess average pore size of 0.001-0.003 cm 3 with the thermal insulation in the range of 47-78%.

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“…There have been previous attempts to recover of metallic Al and synthesize spinel out of aluminum dross. 9,10) However, little literature is available on the use of aluminum dross to synthesize advanced ceramics, although its composition can be easily matched to that of the sialon ceramics if extra nitrogen is incorporated.…”

Section: Introductionmentioning

confidence: 99%

Influence of Hot Pressing Sintering Temperature on β-Sialon-15R Ceramics Synthesized from Aluminum Dross

Wang

Chen

et al. 2012

Mater. Trans.

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Dense ¢-sialon-15R ceramics were fabricated by hot pressing sintering method using aluminum dross as a raw material. The effect of hot pressing sintering temperature on densification, microstructure, mechanical properties and impurity were studied. The results indicated that the main phases of the ceramics were ¢-sialon and 15R AlN polytypoid at 1450, 1550, 1650 and 1750°C, and Fe 5 Si 3 as the main impurity was found. The salts impurities were evaporated from the sample sintered at 1750°C. Most of Mg cations from aluminum dross were incorporated into 15R grains. AlN polytypoids in the multiphase ceramics offer an effective path to reduce the glass phase formed from the oxide impurity in aluminum dross. The aspect ratio of elongated 15R grains increased quickly with the increase of sintering temperature, and a whisker-like microstructure was formed above 1550°C. The ¢-sialon-15R ceramics obtained the highest density of 3.2 g/cm 3 at 1750°C, and the Vickers hardness (Hv 10 ), bending strength and fracture toughness of the material could reach with the value of 12.3 GPa, 432 MPa and 4.31 MPa·m 1/2 , respectively. Fe 5 Si 3 impurity had a negative effect on the mechanical properties.

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Evaluation of aluminum dross waste as raw material for refractories

Cited by 106 publications

References 13 publications

Synthesis and mechanical properties of a calcium sulphoaluminate cement made of industrial wastes

Synthesis and mechanical properties of a calcium sulphoaluminate cement made of industrial wastes

Analysis of aluminum base-reaction effect in density, porosity, and thermal insulation of porous fire bricks

Influence of Hot Pressing Sintering Temperature on β-Sialon-15R Ceramics Synthesized from Aluminum Dross

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Evaluation of aluminum dross waste as raw material for refractories

Cited by 106 publications

References 13 publications

Synthesis and mechanical properties of a calcium sulphoaluminate cement made of industrial wastes

Synthesis and mechanical properties of a calcium sulphoaluminate cement made of industrial wastes

Analysis of aluminum base-reaction effect in density, porosity, and thermal insulation of porous fire bricks

Influence of Hot Pressing Sintering Temperature on &beta;-Sialon-15R Ceramics Synthesized from Aluminum Dross

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Influence of Hot Pressing Sintering Temperature on β-Sialon-15R Ceramics Synthesized from Aluminum Dross