Results 31 to 40 of about 8,830 (171)

Effect of Temperature on Chromite-Based Moulding Sands Bonded with Sodium Silicate

Archives of Foundry Engineering, 2017
In the paper, a research on effects of baking temperature on chromite sand base of moulding sands bonded with sodium silicate is presented. Pure chromite sand and its chromite-based moulding sand prepared with use of sodium silicate were subjected to ...
Stachowicz M., Kamiński M., Granat K., Pałyga Ł.   +3 more
doaj   +1 more source

Emerging Materials and Future Strategies for Solid Oxide Electrochemical Cells

Advanced Energy Materials, EarlyView.
Solid oxide electrochemical cells operate under strongly coupled electrochemical and thermodynamic conditions, where performance is constrained by interactions among crystal structure, defect chemistry, and interfacial evolution. This review, based on a structure‐defect‐property‐durability framework, reveals the roles of lattice symmetry and defect ...
Qiuchun Lu, Yufei Zhang, Han Zhao, Pooi See Lee, Daniel H.C. Chua   +4 more
wiley   +1 more source

Test on Comprehensive Recovery of Chromium from a Foreign Nickel-cobalt Ore

Kuangchan zonghe liyong
A foreign nickel-cobalt ore contains 1.10% nickel and 0.11% cobalt, which mainly exists in cryptocrystalline clay minerals in the form of ion adsorption.
Deyong MENG, Aihui SUN, Jianjian ZOU
doaj   +1 more source

Quality Assessment Method for Chromite Sand to Reduce the Number of Cast Steel Surface Defects [PDF]

Archives of Foundry Engineering
This paper discusses the ability to apply the test method using a scanning electron microscope (SEM) together with EDS (Energy Dispersive Spectroscopy) analysis to assess the quality of fresh chromite sand delivered by various suppliers to Huta Małapanew
T. Wróbel, J. Jezierski, D. Bartocha, E. Feliks, A. Paleń   +4 more
doaj   +1 more source

Role of Lewis centres on ethanol dehydrogenation over the Cu‐Cr/γ‐Al2O3 system

The Canadian Journal of Chemical Engineering, EarlyView.
Cu–Cr interactions on alumina enhance Lewis acid site density, boosting selectivity towards ethanol dehydrogenation products. Soft coke formation on copper and Cu–Cr sites drives deactivation, shifting the reaction towards unwanted dehydration products.
Sakun Preedavijitkul, Wei Tian, Andres Rodriguez‐Marmolejo, Pantita Trongjitraksa, Chaowat Autthanit, Piyasan Praserthdam, Bunjerd Jongsomjit, Jose E. Herrera   +7 more
wiley   +1 more source

Chromite. Processing and Applications

The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science, 2019
In the paper are shown the history, processing and applications of chromite. Chromite is an oxide of iron and chromium with the chemical composition FeO.Cr2O3 and belonging to the spinel group.
Marius VASILESCU, Mircea DOBRESCU
doaj   +1 more source

An investigation into the co-sintering process of limonitic nickel laterite and low-grade chromite via multi-force fields

Journal of Materials Research and Technology, 2021
This study is aimed to obtain better-quality Ni–Cr composite sinter for the production of 300 series stainless steel via the sintering-blast furnace process at lower cost.
Yuxiao Xue, Deqing Zhu, Jian Pan, Zhengqi Guo, Congcong Yang, Hongyu Tian, Qingzhou Huang, Liaoting Pan, Xuezhong Huang   +8 more
doaj   +1 more source

Sequential Reduction of Chromite Pellets Using Hydrogen and Silicon Carbide for Carbon Emission Abatement During Ferrochrome Production

steel research international, EarlyView.
H2 prereduction selectively metallizes Fe in UG2 chromite pellets at 1100°C, while silicon carbide becomes active at 1300°C to convert remaining Cr2O3 to carbides and promote Cr metallization. By separating the roles of H2 and SiC, the sequential route reaches up to 65.7% Cr metallization and suppresses in‐furnace CO generation by ≈75% versus ...
D. Coertzen, M. Tangstad, J. P. Beukes, P. G. van Zyl, D. G. Bessarabov, S. P. du Preez   +5 more
wiley   +1 more source

Studies on genesis of chromite and PGE in Naein ophiolite melange

Journal of Economic Geology, 2012
Nain ophiolite melange is located 140 Km east of Isfahan. Based on the geological studies, this area belongs to Mesozoic ophiolite of Urumieh – Dokhtar zone, west of central Iran. Country rocks are pridotite and serpentinized pridotite.
Reza Shamsipour Dehkordi, Maryan Sadeghi, Zohreh Gholami Fesharaki   +2 more
doaj   +1 more source

Talc‐Tempered Pottery From Bala Hissar, Kabul: An Analytical Study

Archaeometry, EarlyView.
ABSTRACT Potsherds of cooking ware excavated at Bala Hissar archaeological site in Kabul were studied using X‐ray fluorescence (XRF), scanning electron microscope‐energy dispersive X‐ray spectrometry (SEM‐EDS), Raman spectroscopy, X‐ray powder diffraction (XRPD), thermogravimetric analysis (TGA) and optical microscopy.
Parviz Holakooei, Babak Rafiei‐Alavi, Hafizullah Hazim, Hasti Pezeshkanjalili, Lara Maritan   +4 more
wiley   +1 more source