Production of High-Purity Mo and Fe–Mo Alloys from Recycled Mo Oxide and Mill Scale Through Hydrogen Reduction

2019 ◽  
pp. 207-213
Author(s):  
Min-Kyu Paek ◽  
Do-Hyeong Kim ◽  
Daniel Lindberg ◽  
Jong-Jin Pak
Keyword(s):  
High Purity ◽  
Hydrogen Reduction ◽  
Mill Scale

High Purity Magnetite Microparticles Directly Derived from Mill Scale via Hydrogen-Reduction Method

2021 ◽  
Vol 1016 ◽  
pp. 286-291
Author(s):  
Autchariya Boontanom ◽  
Piyada Suwanpinij
Keyword(s):  
Flow Rate ◽  
High Purity ◽  
Gas Flow ◽  
Reduction Method ◽  
Hydrogen Reduction ◽  
Reduction Temperature ◽  
Mixed Gas ◽  
Mill Scale ◽  
X Ray ◽  
Ar Gas

This study develops a fast and simple way to produce high purity magnetite (Fe3O4) microparticles from mill scale by using hydrogen reduction with the addition of vapour as a retarding agent. By optimising the reduction temperature and gas flow rate, the characterisations by X-ray diffractometry technique shown that the Fe3O4 fraction of over 93 wt.-% is shown at the reduction temperature of 550 – 650 oC with the flow rate of the 4.5-5.5 mol%H2 + Ar gas + H2O gas mixture from 100 – 200 ml/min. The highest Fe3O4 fraction of over 99 wt.-% can be achieved from the reduction with the mixed gas at 650 oC and the flow rate of 200 ml/min for 4 hour.

scholarly journals Semi-empirical software for the aluminothermic and carbothermic reactions

2014 ◽  
Vol 20 (3) ◽  
pp. 199-206 ◽  
Author(s):  
Milorad Gavrilovski ◽  
Vaso Manojlović ◽  
Željko Kamberović ◽  
Marija Korać ◽  
Miroslav Sokić
Keyword(s):  
Energy Balance ◽  
Model Validation ◽  
High Purity ◽  
Empirical Data ◽  
Process Model ◽  
Element Distribution ◽  
Mill Scale ◽  
Semi Empirical ◽  
Pyrite Cinders

Understanding the reaction thermochemistry as well as formatting the empirical data about element distribution in gas-metal-slag phases is essential for creating a good model for aluminothermic and carbothermic reaction. In this paper modeling of material and energy balance of these reactions is described with the algorithm. The software, based on this model is basically made for production of high purity ferro alloys through aluminothermic process and then extended for some carbothermic process. Model validation is demonstrated with production of FeTi, FeW, FeB and FeMo in aluminothermic and reduction of mill scale, pyrite cinders and magnetite fines in carbothermic process. 

Synthesis and Characterization of High Purity Ruthenium Sponge

2016 ◽  
Vol 850 ◽  
pp. 489-493
Author(s):  
Wei Yi ◽  
Ze Na Xin ◽  
Yue Sheng ◽  
Zhi Long Tan ◽  
Jun Min Zhang ◽  
...  
Keyword(s):  
High Purity ◽  
Electrode Materials ◽  
Reduction Method ◽  
Hydrogen Reduction ◽  
Refining Process ◽  
Synthesis And Characterization ◽  
Chemical Refining ◽  
Powder Density ◽  
Average Size

Ruthenium is widely used as catalyst, magnetic recording and electrode materials. In this study, high-purity (≥99.995 wt%) ruthenium sponge was synthesized from crude ruthenium (≤99.9 wt%) by chemical refining technique. Initially, crude Ru was transformed into H2RuCl6 by distilling treatment. The H2RuCl6 was, then, added with NH4Cl powder to precipitate (NH4)2RuCl6 powder. Afterward, the (NH4)2RuCl6 powder was ignited in air and transformed into RuO2. Finally, RuO2 was changed to Ru by hydrogen reduction method. Impurities included in the starting Ru powder were eliminated after distillation and precipitation treatments. As-obtained ruthenium particles were spherical-like agglomeration, the average size was about 6 μm and the powder density was 11.83 g/cm3. The details of chemical transforming mechanisms in the refining process were described.

THE PRODUCTION OF TITANIUM TRICHLORIDE BY ARC-INDUCED HYDROGEN REDUCTION OF TITANIUM TETRACHLORIDE

1957 ◽  
Vol 35 (8) ◽  
pp. 850-872 ◽  
Author(s):  
T. R. Ingraham ◽  
K. W. Downes ◽  
P. Marier
Keyword(s):  
Hydrogen Chloride ◽  
High Purity ◽  
Titanium Tetrachloride ◽  
Hydrogen Reduction ◽  
Reducing Power ◽  
Titanium Metal ◽  
Titanium Trichloride ◽  
Powdered Titanium ◽  
Induced Reaction

Finely powdered titanium trichloride of high purity was prepared by an arc-induced reaction of titanium tetrachloride with hydrogen. The hydrogen chloride by-product was passed over heated titanium, and the regenerated hydrogen and titanium tetrachloride were recirculated to the arc. The method in effect utilizes the reducing power of the titanium metal to produce titanium trichloride from titanium tetrachloride.

Hydrogen reduction of copper bleed solution from an Indian copper smelter for producing high purity copper powders

2006 ◽  
Vol 84 (3-4) ◽  
pp. 218-224 ◽  
Author(s):  
Archana Agrawal ◽  
Sarita Kumari ◽  
D. Bagchi ◽  
V. Kumar ◽  
B.D. Pandey
Keyword(s):  
High Purity ◽  
Hydrogen Reduction ◽  
Copper Smelter ◽  
Copper Powders ◽  
Purity Copper
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