scholarly journals Effects of Fe2O3 on Reduction Process of Cr-Containing Solid Waste Self-Reduction Briquette and Relevant Mechanism

Metals ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 51 ◽  
Author(s):  
Tuo Wu ◽  
Yanling Zhang ◽  
Zheng Zhao ◽  
Fang Yuan
Keyword(s):  
Solid Waste ◽  
Steel Slag ◽  
Reduction Process ◽  
Rapid Separation ◽  
Stainless Steel Slag ◽  
Chrome Oxide ◽  
Efficient Recovery ◽  
Lower Temperature ◽  
Quench Method

High-temperature quench method, scanning electron microscope-energy dispersive spectroscopy (SEM-EDS), and thermodynamic analysis were adopted to study the effects of Fe2O3 on reduction process of Cr-containing solid waste self-reduction briquette (Cr-RB). Moreover, the relevant mechanism was also studied. The results clearly showed that the addition of Fe2O3 decreased the chromium-iron ratio (Cr/(Fe + Cr)) of Cr-RB itself and promoted the reduction of chrome oxide in the Cr-containing solid wastes such as stainless steel slag and dust. A large number of Fe-C alloy droplets generated in the lower temperature could decrease the activity of reduced chromium by in situ dissolution and the reduction of Cr-oxide was accelerated. Rapid separation of metal and slag could be achieved at a relatively lower temperature, which was very beneficial to the efficient recovery of Cr. Finally, the corresponding mechanism diagram was presented.

Carbonation of stainless steel slag in the context of in situ Brownfield remediation

2014 ◽  
Vol 59 ◽  
pp. 91-100 ◽  
Author(s):  
Oriana Capobianco ◽  
Giulia Costa ◽  
Laurens Thuy ◽  
Elisa Magliocco ◽  
Niels Hartog ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Steel Slag ◽  
Stainless Steel Slag

Corrigendum to “Carbonation of stainless steel slag in the context of in situ Brownfield remediation” [Minerals Eng. 59 (2014) 91–100]

2014 ◽  
Vol 69 ◽  
pp. 223
Author(s):  
Oriana Capobianco ◽  
Giulia Costa ◽  
Laurens Thuy ◽  
Elisa Magliocco ◽  
Niels Hartog ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Steel Slag ◽  
Stainless Steel Slag

scholarly journals Synthesis of chromium and ferrochromium alloy in molten salts by the electro-reduction method

2015 ◽  
Vol 51 (2) ◽  
pp. 185-191 ◽  
Author(s):  
X. Ge ◽  
S. Jin ◽  
M. Zhang ◽  
X. Wang ◽  
S. Seetharaman
Keyword(s):  
Chromium Oxide ◽  
Steel Slag ◽  
Reduction Process ◽  
Advanced Characterization ◽  
Low Grade ◽  
Oxide Mixture ◽  
Stainless Steel Slag ◽  
Chromite Ore ◽  
First Time ◽  
Sintered Temperature

In this work, we successfully applied the Fray-Farthing-Chen Cambridge electro-reduction process on the preparation of chromium from chromium oxide, and for the first time, the synthesis of ferrochromium alloy from chromium oxide and iron oxide mixture and the chromite ore in molten calcium chloride. The present work systematically investigated the influences of sintered temperature of the solid precursor, electrochemical potential, electrolysis temperature and time on the products by using a set of advanced characterization techniques, including XRD and SEM/EDS analyses. In particular, our results show that this process is energy-friendly and technically-feasible for the direct extraction of ferrochromium alloy from chromite ore. Our findings thus provide useful insights for designing a novel green process to produce ferrochromium alloy from low-grade chromite ore or stainless steel slag.

In Situ ATR-FTIR Studies of Ethanol Electro-oxidation in Alkaline Medium on PtRh/C Electrocatalyst Prepared by an Alcohol Reduction Process

2016 ◽  
Vol 7 (4) ◽  
pp. 297-304 ◽  
Author(s):  
E. H. Fontes ◽  
Sirlane G. da Silva ◽  
E. V. Spinace´ ◽  
A. O. Neto ◽  
R. F. B. de Souza
Keyword(s):  
Alkaline Medium ◽  
Reduction Process ◽  
Ftir Studies ◽  
Electro Oxidation ◽  
Alcohol Reduction

Municipal solid waste in situ moisture content measurement using an electrical resistance sensor

2003 ◽  
Vol 23 (7) ◽  
pp. 667-674 ◽  
Author(s):  
Nitin A. Gawande ◽  
Debra R. Reinhart ◽  
Philip A. Thomas ◽  
Philip T. McCreanor ◽  
Timothy G. Townsend
Keyword(s):  
Moisture Content ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Electrical Resistance ◽  
Content Measurement ◽  
Moisture Content Measurement

A Pictorial Tracking of Basal Plane Dislocations in SiC Epitaxy

2010 ◽  
Vol 645-648 ◽  
pp. 271-276 ◽  
Author(s):  
Robert E. Stahlbush ◽  
Rachael L. Myers-Ward ◽  
Brenda L. VanMil ◽  
D. Kurt Gaskill ◽  
Charles R. Eddy
Keyword(s):  
Epitaxial Growth ◽  
Basal Plane ◽  
Reduction Process ◽  
Epitaxial Layers ◽  
In Situ Growth ◽  
Half Loop ◽  
Insight Into

The recently developed technique of UVPL imaging has been used to track the path of basal plane dislocations (BPDs) in SiC epitaxial layers. The glide of BPDs during epitaxial growth has been observed and the role of this glide in forming half-loop arrays has been examined. The ability to track the path of BPDs through the epitaxy has made it possible to develop a BPD reduction process for epitaxy grown on 8° offcut wafers, which uses an in situ growth interrupt and has achieved a BPD reduction of > 98%. The images also provide insight into the strong BPD reduction that typically occurs in epitaxy grown on 4° offcut wafers.

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