Spinel refractory aggregates from natural raw materials

Resende, W. S.; Stoll, R. M.; Pallone, Elíria Maria de Jesus Agnolon; Cunha, Fernando Nobre; Bradt, R. C.

doi:10.1007/bf03402874

Cited by 5 publications

(5 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Spinel provides advantages of no permeability for liquid and gas, low thermal conductibility, high chemical resistibility, and its Mohs Hardness is equal to 8 [9]. For the characteristics of spinel materials, they are widely used as refractory materials employed in the glass and steel industries [10][11][12], and as a potential candidate material for internal reforming solid oxide fuel cell anodes [13].…”

Section: Introductionmentioning

confidence: 99%

Stabilization and phase transformation of CuFe2O4 sintered from simulated copper-laden sludge

et al. 2011

Journal of Hazardous Materials

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Stabilization and phase transformation of CuFe2O4 sintered from simulated copper-laden sludge

et al. 2011

Journal of Hazardous Materials

View full text Add to dashboard Cite

“…The annual production of construction ceramics is of a volume sufficient to receive the ongoing generation of metal-laden sludge, even if incorporated in trace concentrations. The reasonably high firing temperatures normally used (900−1600 °C) in the brick, tile, and refractory aggregate industries may be helpful to promote an effective incorporation of waste materials into the ceramic matrix ( − ). To minimize the cost of waste blending, existing industrial production processes could be adapted to work within the limitations of precursor choice, sintering temperature, and sintering time.…”

Section: Introductionmentioning

confidence: 99%

Spinel Formation for Stabilizing Simulated Nickel-Laden Sludge with Aluminum-Rich Ceramic Precursors

Shih

White

Leckie

2006

Environ. Sci. Technol.

View full text Add to dashboard Cite

The feasibility of stabilizing nickel-laden sludge from commonly available Al-rich ceramic precursors was investigated and accomplished with high nickel incorporation efficiency. To simulate the process, nickel oxide was mixed alternatively with gamma-alumina, corundum, kaolinite, and mullite and was sintered from 800 to 1480 degrees C. The nickel aluminate spinel (NiAl2O4) was confirmed as the stabilization phase for nickel and crystallized with efficiencies greater than 90% for all precursors above 1250 degrees C and 3-h sintering. The nickel-incorporation reaction pathways with these precursors were identified, and the microstructure and spinel yield were investigated as a function of sintering temperature with fixed sintering time. This study has demonstrated a promising process for forming nickel spinel to stabilize nickel-laden sludge from a wide range of inexpensive ceramic precursors, which may provide an avenue for economically blending waste metal sludges via the building industry processes to reduce the environmental hazards of toxic metals. The correlation of product textures and nickel incorporation efficiencies through selection of different precursors also provides the option of tailoring property-specific products.

show abstract

“…Sintered MgAl 2 O 4 is studied as a stable insulator material in the field of high energy applications, e.g., fission and fusion energy devices [3,4]. MgAl 2 O 4 has a high melting point (~2378 K) [5], and therefore, dense and porous MgAl 2 O 4 sintered bodies have been applied to refractories [6,7] and thermal insulators [8], respectively. Furthermore, by using the excellent chemical stability of MgAl 2 O 4 , it is also applied for catalysts [9] and catalyst supports [10].…”

Section: Introductionmentioning

confidence: 99%

Reactively sintered porous MgAl2O4 for water-purification filter with controlled particle morphology

Kamato

Suzuki

2017

Ceramics International

View full text Add to dashboard Cite

Porous MgAl 2 O 4 filters were prepared by reactive sintering of a MgCO 3 (basic) powder and 4-type Al 2 O 3 source powders with different particle size and phases (-Al 2 O 3 , fine and coarse boehmite AlOOH, and -Al 2 O 3). The mixed powder compacts were reactively sintered in air at 1200, 1400 or 1600 °C for 2 h to obtain MgAl 2 O 4. Single-phase porous MgAl 2 O 4 was successfully obtained by the reactive sintering at 1400 and 1600 °C. From the SEM observation, the initial particle sizes of Al 2 O 3 sources strongly affected the final microstructure of porous MgAl 2 O 4 , rather than the phases of Al 2 O 3 sources. The porous MgAl 2 O 4 filter made from fine boehmite source exhibited good performance to remove submicron-sized colloidal particles (simulating bacteria) from a suspension. Possibility of the thermal recovery of porous MgAl 2 O 4 filter was demonstrated.

show abstract

Spinel refractory aggregates from natural raw materials

Cited by 5 publications

References 14 publications

Stabilization and phase transformation of CuFe2O4 sintered from simulated copper-laden sludge

Stabilization and phase transformation of CuFe2O4 sintered from simulated copper-laden sludge

Spinel Formation for Stabilizing Simulated Nickel-Laden Sludge with Aluminum-Rich Ceramic Precursors

Reactively sintered porous MgAl2O4 for water-purification filter with controlled particle morphology

Contact Info

Product

Resources

About