نتایج جستجو برای: metallurgical industries

تعداد نتایج: 49995  

2010

Original scientific paper The properties of metallurgical cokes obtained in a laboratory from pure coal and with additives (light atmospheric residue of oil distillation and coal tar pitch) after heat treatment to 1600 °C were investigated. Changes in the basic characteristics (density, moisture, ash, metal and sulphur contents) were examined. Crystallographic parameters (crystallite size, Lc a...

2012
B. GAJDZIK

B. Gajdzik, The Silesian University of Technology, Faculty of Materials Science and Metallurgy, Katowice, Poland In the theoretical part of the publication an overview of the defi nitions of employee engagement was conducted together with the analysis of the methods and techniques which infl uence the professional activity of the employees in the metallurgical enterprise. The practical part dis...

Journal: :Environmental pollution 2010
Lin-Chi Wang Wen-Jhy Lee Wei-Shan Lee Guo-Ping Chang-Chien

Here we show that combustion sources, including waste incinerators, metallurgical processes, power-heating systems and so on, are also important emitters of polybrominated diphenyl ethers (PBDEs) to the atmosphere. Geometric mean PBDE concentrations in the stack flue gases of the combustion sources ranged from 8.07 to 469 ng/Nm3. The sinter plants (24.7 mg/h), electric arc furnaces (EAFs) (11.3...

Journal: :Metals 2023

Elemental sulfur is an important non-metallic material that widely used in various fields including chemical, metallurgical and sulfuric acid industries. Polymetallic slag (PSS) secondary resource for the recovery of sulfur. However, separation from PSS difficult due to tight binding some thiophilic metals Herein, we proposed a recrystallization method effective by using organic solvents contro...

Journal: : 2022

A classification of heat exchangers with fluidization bulk material for use in enterprises the chemical, mining, construction, food, metallurgical and processing industries has been developed. critical review most characteristic designs a fluidized bed, proposed by scientists, designers inventors leading countries world, carried out. The are analyzed depending on method fluidization, role excha...

Journal: :Materials & Design 2021

Joining of dissimilar metals is required for numerous applications in industries such as chemical, energy and automotive. It challenging due to differences melting point, density, thermal expansion the being joined. Common welding techniques involve limiting solidification a narrow area leading high stresses potentially brittle intermetallic phases. Furthermore, geometric complexity these welde...

Journal: :Asian Archaeology 2023

Abstract This article presents the oldest iron smelting furnaces of Xiongnu Empire period in central Mongolia and argues that a significant center existed at site Baga Nariĭn Am. Five four installations were excavated, with total 26 further identified through SQUID magnetometry. In combination review data on production contemporary Mongolia, Transbaikal region, Tuva, Minusinsk Basin Altai, we a...

Journal: :Fracture and Structural Integrity 2022

High Entropy Alloys (HEAs) is a unique class of materials that combine particular properties in large-scale temperatures, able to guarantee new unexplored and alloys with several potentially engineering applications (i.e. space aerospace industries). As promising structural materials, HEAs consist five or more principal elements. consequence the monophasic microstructure which usually character...

Journal: :Journal of rehabilitation research and development 1986
S D Cook M A Kester A F Harding T D Brown P M Sandborn

The clinical and metallurigical characteristics of five cast cobalt-chromium-molybdenum alloy femoral hip prostheses which failed in vivo were evaluated. The devices included: two of the Howmedica Muller-Charnley design, two of the Howmedica Charnley design, and one of the Zimmer Aufranc-Turner design. Fractographic analyses demonstrated that the five devices had failed by fatigue which origina...

2006
M. Zergoug

Abstract: A lot of progress is made in the last decade concerning the theoretical and practical aspects of eddy current testing. In addition to the defect characterization, actual studies deal with the metallurgical evaluation of materials. Surface examination allows the prediction of the material strength and consequently its life time. In order to obtain various microstructures and to modify ...

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