Preparation of an ultrafine nickel powder by solid-phase reduction with a NaCl separator agent

2020 ◽  
Vol 31 (8) ◽  
pp. 3433-3439
Author(s):  
Wang Zhubo ◽  
Chen Jie ◽  
Liu Rutie ◽  
Li Hao ◽  
Lin Xueyang ◽  
...  
Keyword(s):  
Nickel Powder ◽  
Solid Phase ◽  
Phase Reduction ◽  
Ultrafine Nickel

scholarly journals Influence of Cu on the Improvement of Magnetic Properties and Structure of L10 FePt Nanoparticles

Nanomaterials ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 1097
Author(s):  
Luran Zhang ◽  
Xinchen Du ◽  
Hongjie Lu ◽  
Dandan Gao ◽  
Huan Liu ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Annealing Temperature ◽  
Reduction Method ◽  
Solid Phase ◽  
Average Particle Size ◽  
Fept Nanoparticles ◽  
Average Particle ◽  
Phase Reduction ◽  
Different Temperatures ◽  
One Step

L10 ordered FePt and FePtCu nanoparticles (NPs) with a good dispersion were successfully fabricated by a simple, green, one-step solid-phase reduction method. Fe (acac)3, Pt (acac)2, and CuO as the precursors were dispersed in NaCl and annealed at different temperatures with an H2-containing atmosphere. As the annealing temperature increased, the chemical order parameter (S), average particle size (D), coercivity (Hc), and saturation magnetization (Ms) of FePt and FePtCu NPs increased and the size distribution range of the particles became wider. The ordered degree, D, Hc, and Ms of FePt NPs were greatly improved by adding 5% Cu. The highest S, D, Hc, and Ms were obtained when FePtCu NPs annealed at 750 °C, which were 0.91, 4.87 nm, 12,200 Oe, and 23.38 emu/g, respectively. The structure and magnetic properties of FePt and FePtCu NPs at different annealing temperatures were investigated and the formation mechanism of FePt and FePtCu NPs were discussed in detail.

The Metallurgical Characterization of Iron-Containing Concentrate

2020 ◽  
Vol 989 ◽  
pp. 428-433
Author(s):  
B.M. Myrzaliev ◽  
Kulgamal A. Nogaeva ◽  
E.B. Kolmachikhina
Keyword(s):  
Solid Phase ◽  
Metallic Copper ◽  
Iron Alloys ◽  
Metallic Phase ◽  
Phase Reduction ◽  
Slag Copper ◽  
Metallurgical Characterization ◽  
Two Phases ◽  
Metallization Process

The expediency of processing iron-containing concentrate with low iron content, increased content of manganese and copper is considered in the article. To process such a concentrate, a metallization process is proposed to produce sponge iron with a reducing agent - carbon. It was found that in solid-phase reduction at 1150 °C iron is reduced to a greater extent, as well as small particles with a copper content of about 95%, manganese is not recovered. The simulation process of metallization with carbon at a temperature of 1250 °C shows that iron is mainly distributed in the metallic phase, to a lesser extent in slag phases, manganese is distributed in two phases - metal and slag, copper is presented as a separate phase of metallic copper in the composition with iron alloys, and also composes a part of iron alloys. The reduction degree from concentrate to the metallic part is 80 - 91% for iron and 95 - 98% for copper. The presence of metallized particles of various sizes, representing phases of iron with manganese and copper was found in the slags.

Solid-phase reduction of waste products from steelmaking

Metallurgist ◽  
2012 ◽  
Vol 56 (1-2) ◽  
pp. 91-96 ◽  
Author(s):  
A. N. Dildin ◽  
V. I. Chumanov ◽  
I. V. Chumanov ◽  
V. E. Eremyashev
Keyword(s):  
Solid Phase ◽  
Waste Products ◽  
Phase Reduction

Zonal separation in the sintering of an ultrafine nickel powder

1985 ◽  
Vol 24 (7) ◽  
pp. 536-539 ◽  
Author(s):  
R. A. Andrievskii ◽  
S. �. Zeer
Keyword(s):  
Nickel Powder ◽  
Zonal Separation ◽  
Ultrafine Nickel

scholarly journals Correction to: “Advanced Method for Recycling Red Mud by Carbothermal Solid-Phase Reduction Using Sodium Sulfate”

Metallurgist ◽  
2020 ◽  
Vol 63 (11-12) ◽  
pp. 1345-1345 ◽  
Author(s):  
P. I. Grudinskii ◽  
D. V. Zinoveev ◽  
A. F. Semenov ◽  
A. S. Zakunov ◽  
V. G. Dyubanov ◽  
...  
Keyword(s):  
Red Mud ◽  
Sodium Sulfate ◽  
Solid Phase ◽  
Advanced Method ◽  
Phase Reduction

Solid-Phase Reduction of Iron from Suroyam Titanomagnetite Ore during Metallization in Rotary Kiln

2019 ◽  
Vol 946 ◽  
pp. 512-516
Author(s):  
K.I. Smirnov ◽  
S.P. Salikhov ◽  
V.E. Roshchin
Keyword(s):  
Electron Microscope ◽  
Melting Point ◽  
Rotary Kiln ◽  
Solid Phase ◽  
Reduction Process ◽  
Reducing Agent ◽  
Continuous Processing ◽  
Phase Reduction ◽  
Reduction Of Iron ◽  
Electron Microscope Analysis

In this work the solid-phase reduction of iron from the Suroyam titanomagnetite ore was studied during metallization in a rotary kiln. The technique of preparation of the ore and reducing agent for metallization and the process of continuous processing of materials in a rotary kiln were described in detail. For metallization the temperature was chosen 1150°C, due to low melting point of apatite from one of the components. The results of the electron microscope analysis of the initial ore and samples subjected to metallization for 1-hour reduction time were presented. The reduction of iron occurred despite absence of pores and contact with a reducing agent in the grains of titanomagnetite. Iron in the grains of titanomagnetite surrounded by apatite was reduced to wustite; whereas, iron surrounded by clinopyroxene was reduced to metallic iron. This indicated the effect of composition of the gangue materials on the reduction process.

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