scholarly journals Experience of graphite-containing dust of metallurgical plants processing

2019 ◽  
Vol 75 (5) ◽  
pp. 632-639
Author(s):  
N. V. Fadeeva ◽  
N. N. Orekhova ◽  
O. E. Gorlova
Keyword(s):  
Carbon Materials ◽  
State Of The Art ◽  
Foam Formation ◽  
Ecological Significance ◽  
State Technical ◽  
Extensive Experience ◽  
Gas Cleaning ◽  
Russian Industry ◽  
Reagent Mode ◽  
Constant Practice

Graphite is a component of graphite-containing dust – one of wastes, formed at metallurgical plants. From the other side, it is a scare resource for the Russian industry. Involvement of graphite-containing wastes into processing can contribute to solving actual problems of resource, economic and ecological significance. Study of the graphite wastes utilization possibility showed an absence of constant practice of their processing at domestic metallurgical plants. The work of graphite department of Magnitogorsk steel-works (MMK) can be one of not numerous examples of the graphite dust processing at the same plant. At the department the processing of graphite-containing dust of accomplished, the dust being collected from 90 kg/h productivity gas cleaning systems of BOF shop. As a result of processing graphite concentrate obtained after flotation and iron powder – after magnetic separation. At the Department “Minerals enrichment” of the Magnitogorsk State Technical University after G.I. Nosov, the theory of graphite flotation is being elaborated under the direction of Professor V.B. Chizhevsky for many years. Besides study of graphite ores washability, which are difficult to be enriched is also carried out. Based on the gained extensive experience on perfection of reagent flotation modes for the graphite ores, it was recommended to use first VKP reagent at the MMK graphite department, and next – RAS foam formation agent, which is a refined sodium alkylartile-sulfonate. At the industrial tests, the RAS foam formation agent consumption was two times as lower comparing with industrial reagent mode, resulting in obtaining higher technological flotation indices. The experience of metallurgical plant graphite-containing dust processing can be used at both the MMK graphite department re-operation and at other plants of the industry for obtaining marketable products of high quality, that can meet requirements not only metallurgical plants, but also used for production of state-of-the-art carbon materials.

Industrial GaN FET technology

2010 ◽  
Vol 2 (1) ◽  
pp. 21-32 ◽  
Author(s):  
Hervé Blanck ◽  
James R. Thorpe ◽  
Reza Behtash ◽  
Jörg Splettstößer ◽  
Peter Brückner ◽  
...  
Keyword(s):  
State Of The Art ◽  
Current Status ◽  
European Research ◽  
Extensive Experience ◽  
Research Institutes ◽  
Covering Material ◽  
Active Observation ◽  
Rf Electronics ◽  
Gan Fet

GaN technology has gained a lot of attention in Europe over the last few years for various domains including RF electronics. After a few years of active observation, United Monolithic Semiconductors (UMS) has taken the decision to introduce a GaN technology family in its portfolio. Based on its extensive experience of III–V technology and the intensive support and collaboration with partners and European research institutes, UMS has developed the capability to produce state-of-the-art GaN devices and circuits. The present paper will summarize the current status achieved and illustrate it with a few representative examples. Aspects covering material, devices, and circuits will be addressed.

scholarly journals STATE OF THE ART GAS CLEANING AND UTILIZATION FOR BOF GASES: OPERATIONAL RESULTS AND BENEFITS

2014 ◽  
Author(s):  
Thomas Germershausen ◽  
Christian Fröhling ◽  
Matthias Meyn ◽  
Volker Trappmann ◽  
Jörg Thomasberger
Keyword(s):  
State Of The Art ◽  
Gas Cleaning

Advanced nanoarchitectures of carbon aerogels for multifunctional environmental applications

2016 ◽  
Vol 5 (1) ◽  
Author(s):  
Peidong Hu ◽  
Beihui Tan ◽  
Mingce Long
Keyword(s):  
Environmental Remediation ◽  
Carbon Materials ◽  
State Of The Art ◽  
Carbon Aerogels ◽  
Formaldehyde Resin ◽  
Capacitive Deionization ◽  
Resorcinol Formaldehyde ◽  
Hierarchical Porosity ◽  
Proper Design ◽  
Application Of Cas

AbstractIn recent decades, carbon aerogels (CAs) have attracted increasing attention. Compared with other carbon materials, CAs are available in macroscopic diverse morphologies with tunable hierarchical porosity and large specific surface area. The interconnected carbonaceous framework also endows CAs with excellent electrical properties. CA can be a promising material for various purposes through proper design and functionalization. In this article, we place an emphasis on CAs based on resorcinol-formaldehyde resin and graphene sheets. We review the state-of-the-art progress on the preparation of functionalized CAs, and the relationships between their advanced nanoarchitectures and performances in environmental remediation, including adsorption, capacitive deionization and catalysis, are discussed. The challenges in design and application of CAs are also proposed.

scholarly journals Applications of Nanostructured Carbon Materials in Constructions: The State of the Art

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
Shu-Nan Lu ◽  
Ning Xie ◽  
Li-Chao Feng ◽  
Jing Zhong
Keyword(s):  
Nanostructured Materials ◽  
High Speed ◽  
Carbon Materials ◽  
State Of The Art ◽  
The State ◽  
Nanostructured Carbon ◽  
Graphene Oxides ◽  
Mechanical Reinforcement ◽  
Self Heating ◽  
Dispersion Condition

The most recent studies on the applications of nanostructured carbon materials, including carbon nanotubes, carbon nanofibers, and graphene oxides, in constructions are presented. First, the preparation of nanostructured carbon/infrastructure material composites is summarized. This part is mainly focused on how the nanostructured carbon materials were mixed with cementitious or asphalt matrix to realize a good dispersion condition. Several methods, including high speed melting mixing, surface treatment, and aqueous solution with surfactants and sonication, were introduced. Second, the applications of the carbon nanostructured materials in constructions such as mechanical reinforcement, self-sensing detectors, self-heating element for deicing, and electromagnetic shielding component were systematically reviewed. This paper not only helps the readers understand the preparation process of the carbon nanostructured materials/infrastructure material composites but also sheds some light on the state-of-the-art applications of carbon nanostructured materials in constructions.

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