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Tytuł:
Study of solidification behaviour and mechanical properties of arc stud welded AISI 316L stainless steel
Autorzy:
Abass, M. H.
Alali, M. S.
Abbas, W. S.
Shehab, A. A.
Powiązania:
https://bibliotekanauki.pl/articles/367964.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
arc stud welding
AISI 316L stainless steel
solidification mode
solidification cracking
second phase
spawanie łukowe
stal nierdzewna AISI 316L
model krzepnięcia
druga faza
Opis:
Purpose: This paper aims to investigate the impact of arc stud welding (ASW) process parameters on the microstructure and mechanical properties of AISI 316L stainless steel stud/plate joint. Design/methodology/approach: The weld performed using ASW machine. The influence of welding current and time on solidification mode and microstructure of the fusion zone (FZ) was investigated using optical microscope and scanning electron microscope (SEM). Microhardness and torque strength tests were utilised to evaluate the mechanical properties of the welding joint. Findings: The results showed that different solidification modes and microstructure were developed in the FZ. At 400 and 600 A welding currents with 0.2 s welding time, FZ microstructure characterised with single phase austenite or austenite as a primary phase. While with 800 A and 0.2 s, the microstructure consisted of ferrite as a primary phase. Highest hardness and maximum torque strength were recorded with 800 A. Solidification cracking was detected in the FZ at fully austenitic microstructure region. Research limitations/implications: The main challenge in this work was how to avoid the arc blow phenomenon, which is necessary to generate above 300 A. The formation of arc blow can affect negatively on mechanical and metallurgical properties of the weld. Practical implications: ASW of austenitic stainless steel are used in multiple industrial sectors such as heat exchangers, boilers, furnace, exhaust of nuclear power plant. Thus, controlling of solidification modes plays an important role in enhancing weld properties. Originality/value: Study the influence of welding current and time of ASW process on solidification modes, microstructure and mechanical properties of AISI 316 austenitic stainless steel stud/plate joint.
Źródło:
Journal of Achievements in Materials and Manufacturing Engineering; 2019, 97, 1; 5-14
1734-8412
Pojawia się w:
Journal of Achievements in Materials and Manufacturing Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structure of X5CrNi18-10 and S355NL steels after remelting with the electric arc
Autorzy:
Adamiak, S.
Powiązania:
https://bibliotekanauki.pl/articles/947417.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
stal konstrukcyjna
przetapianie
warstwa powierzchniowa
plazma
łuk elektryczny
badanie strukturalne
construction steel
remelting
surface layer
plasma
electric arc
structure research
Opis:
The work presents the results of the research and tests of the surface machining of the S355NL and X5CrNi18-10 steels with the concentraded stream of heat with the usage of the GTAW method. The surface layers of the tested steels were remelted with the electric arc using the current of the electric arc 50, 100, 150 and 200A.The machining was done in the atmosphere of argon with the constant speed of the welding head. A microscope examination was performed of the obtained structure and measurements of depth, width and hardness of the received surface layer were performed. Moreover the relation between the current of the electric arc and geometry of the remelted layers with their microhardeness was examined.
Źródło:
Archives of Foundry Engineering; 2012, 12, 2; 139-142
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cretaceous magmatic evolution in the Deylaman igneous complex, Alborz zone, Iran : change from extensional to compressional regime
Autorzy:
Akmali, Sheida
Asiabanha, Abbas
Haghnazar, Shahrooz
Powiązania:
https://bibliotekanauki.pl/articles/2058637.pdf
Data publikacji:
2019
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
back-arc magmatism
Cretaceous
Neotethys
Alborz
Iran
Opis:
The Deylaman igneous complex, as a part of the Late Cretaceous rock unit that lies behind the Paleogene Alborz magmatic arc, in the northern Alborz zone, is composed of basaltic sheet lavas alternating with the pelagic calcareous sediments, basaltic pillow lavas, felsic lavas and gabbroic-monzodioritic intrusions. The pelagic calcareous deposits contain microfossils representing the Santonian-Maastrichtian ages. Furthermore, petrographic textures such as the hyalomicrolitic texture and swallow-tail plagioclase crystals in the pillow lavas, and also segregation vesicles in the basaltic sheet lavas, imply high external (hydrostatic) pressures as the magma was extruded in a deep-water environment. The rock samples show both compositional bimodality and characteristic trends in the variation diagrams. Also, some geochemical characteristics imply that the basaltic lavas originated from the partial melting of an undepleted deep mantle source containing spinel lherzolite: the enrichment patterns of LREE/HREE ratios of the samples [(La/Yb)n = 3.93-4.16 for basaltic lavas and 10.92 for felsic lavas] lying between those characteristic of OIBs [(La/Yb)n = 12.92] and EMORBs [(La/Yb)n = 1.91]; similarities between the patterns of multi-element spider-diagrams; LILE bulges in the basaltic samples compared with those of OIBs. Moreover, the samples show influence from two geotectonic environments: supra-subduction zone (SSZ) settings and plume-type within-plate magmas. Therefore, because of the deep submarine environment inferred for the effusive volcanic eruptions in Santonian-Maastrichtian time, it seems that the Deylaman igneous complex evolved through two stages: first, a tensional regime in a supra-subduction zone (farther from the Mesozoic magmatic arc) and formation of an embryonic rift-related oceanic basin in the Late Jurassic-Early Cretaceous; secondly, a compressive regime in the Late Cretaceous-Early Paleocene and inland migration of the magmatic arc. Consequently, the Cretaceous magmatism can be interpreted as a prelude to the Eocene magmatic flare-up in the magmatic arcs of Iran.
Źródło:
Geological Quarterly; 2019, 63, 4; 757--770
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Arc-transitive and s-regular Cayley graphs of valency five on Abelian groups
Autorzy:
Alaeiyan, Mehdi
Powiązania:
https://bibliotekanauki.pl/articles/744001.pdf
Data publikacji:
2006
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
Cayley graph
normal Cayley graph
arc-transitive
s-regular Cayley graph
Opis:
Let G be a finite group, and let $1_G ∉ S ⊆ G$. A Cayley di-graph Γ = Cay(G,S) of G relative to S is a di-graph with a vertex set G such that, for x,y ∈ G, the pair (x,y) is an arc if and only if $yx^{-1} ∈ S$. Further, if $S = S^{-1}:= {s^{-1}|s ∈ S}$, then Γ is undirected. Γ is conected if and only if G = ⟨s⟩. A Cayley (di)graph Γ = Cay(G,S) is called normal if the right regular representation of G is a normal subgroup of the automorphism group of Γ. A graph Γ is said to be arc-transitive, if Aut(Γ) is transitive on an arc set. Also, a graph Γ is s-regular if Aut(Γ) acts regularly on the set of s-arcs. In this paper, we first give a complete classification for arc-transitive Cayley graphs of valency five on finite Abelian groups. Moreover, we classify s-regular Cayley graph with valency five on an abelian group for each s ≥ 1.
Źródło:
Discussiones Mathematicae Graph Theory; 2006, 26, 3; 359-368
2083-5892
Pojawia się w:
Discussiones Mathematicae Graph Theory
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rainbow Connectivity of Cacti and of Some Infinite Digraphs
Autorzy:
Alva-Samos, Jesús
Montellano-Ballesteros, Juan José
Powiązania:
https://bibliotekanauki.pl/articles/31341981.pdf
Data publikacji:
2017-05-01
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
rainbow connectivity
cactus
arc colouring
Opis:
An arc-coloured digraph D = (V,A) is said to be rainbow connected if for every pair {u, v} ⊆ V there is a directed uv-path all whose arcs have different colours and a directed vu-path all whose arcs have different colours. The minimum number of colours required to make the digraph D rainbow connected is called the rainbow connection number of D, denoted rc⃗ (D). A cactus is a digraph where each arc belongs to exactly one directed cycle. In this paper we give sharp upper and lower bounds for the rainbow connection number of a cactus and characterize those cacti whose rainbow connection number is equal to any of those bounds. Also, we calculate the rainbow con- nection numbers of some infinite digraphs and graphs, and present, for each n ≥ 6, a tournament of order n and rainbow connection number equal to 2.
Źródło:
Discussiones Mathematicae Graph Theory; 2017, 37, 2; 301-313
2083-5892
Pojawia się w:
Discussiones Mathematicae Graph Theory
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Transient finite element simulation and microstructure evolution of AA2219 weld joint using gas tungsten arc welding process
Autorzy:
Arunkumar, S.
Shrikrishna, A. K.
Paulraj, S.
Devakumaran, K.
Kumar, S. R.
Powiązania:
https://bibliotekanauki.pl/articles/101882.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
AA2219 aluminium alloy
gas tungsten arc welding
finite element simulation
metallurgical characterization
Opis:
In this study we focus on finite element simulation of gas tungsten arc welding (GTAW) of AA2219 aluminum alloy and the behavioral of the microstructure before and after weld. The simulations were performed using commercial COMSOL Multiphysics software. The thermal history of the weld region was studied by initially developed mathematical model. A sweep type meshing was used and transient analysis was performed for one welding cycle. The highest temperature noted was 3568 °C during welding. The welding operation was performed on 200×100×25 mm plates. Through metallurgical characterization, it was observed that a fair copper rich cellular (CRC) network existed in the weld region. A small amount of intermetallic compounds like Al2Cu is observed through the XRD pattern.
Źródło:
Advances in Science and Technology. Research Journal; 2016, 10, 31; 64-73
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On signed arc total domination in digraphs
Autorzy:
Asgharsharghi, L.
Khodkar, A.
Sheikholeslami, S. M.
Powiązania:
https://bibliotekanauki.pl/articles/254811.pdf
Data publikacji:
2018
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
signed arc total dominating function signed arc total domination number domination in digraphs
Opis:
Let D = (V, A) be a finite simple digraph and N(uv) = {u'v' ≠ uv | u = u' or v = v'} be the open neighbourhood of uv in D. A function ƒ : A → { — 1, +1} is said to be a signed arc total dominating function (SATDF) of D if [formula] holds for every arc uv ∈ A. The signed arc total domination number [formula] is defined as [formula]. In this paper we initiate the study of the signed arc total domination in digraphs and present some lower bounds for this parameter.
Źródło:
Opuscula Mathematica; 2018, 38, 6; 779-794
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Petrological studies of Neoproterozoic serpentinized ultramafics of the Nubian Shield: spinel compositions as evidence of the tectonic evolution of Egyptian ophiolites
Autorzy:
Azer, M. K.
Powiązania:
https://bibliotekanauki.pl/articles/139397.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Neoproterozoic
Serpentinite
Arabian-Nubian Shield
chromian spinel
fore-arc
neoproterozoik
serpentynit
spinel
Opis:
The mafic-ultramafic rocks of the Gabal El-Degheimi area, Central Eastern Desert of Egypt, are parts of an ophiolitic section. The ophiolitic rocks are dismembered and tectonically enclosed within, or thrust over, island arc assemblages. Serpentinites, altered slices of the upper mantle, represent a distinctive lithology of the dismembered ophiolites. Some portions of the serpentinized rocks contain fresh relicts of primary minerals such as chromian spinel and olivine. The abundance of bastite and mesh textures suggests harzburgite and dunite protoliths, respectively, for these serpentinites. Some fresh cores of chromian spinel are rimmed by ferritchromite and Cr-magnetite. The development of alteration rims around chromian spinel cores indicates their formation during prograde alteration and under oxidizing conditions during lower amphibolite facies metamorphism. Fresh chromian spinels are characterized by high contents of Cr2O3 (48.92–56.74 wt. %), Al2O3 (10.29–20.08wt. %), FeO (16.24–28.46 wt. %) and MgO (4.89–14.02 wt. %), and very low TiO2 contents (<0.16 wt. %). The analyzed fresh chromian spinels have high Cr# (0.62–0.79) characteristic of spinels in mantle peridotite that has undergone some degree of partial melting. The data presented here suggest that the mantle peridotites of the Gabal El-Degheimi area are similar to forearc peridotites of suprasubduction zone environments.
Źródło:
Acta Geologica Polonica; 2014, 64, 1; 113-127
0001-5709
Pojawia się w:
Acta Geologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ azotowania jarzeniowego na właściwości powłok stalowych natryskiwanych cieplnie
The influence of glow-discharge nitriding on the properties of thermally sprayed steel coatings
Autorzy:
Babul, T.
Olbrycht, A.
Pawlik, S.
Trojanowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/115117.pdf
Data publikacji:
2018
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
natryskiwanie cieplne
natryskiwanie łukowe
azotowanie jarzeniowe
powłoka X46Cr13
powłoka X2CrNi18-9
twardość Vickersa
odporność na zużycie
metoda Amslera
thermal spraying
arc spraying
glow-discharge nitriding
X46Cr13 coating
X2CrNi18-9 coating
Vickers hardness
wear resistance
Amsler method
Opis:
Technologie hybrydowe to jeden z kierunków rozwoju inżynierii materiałowej. Wpisują się w tę tematykę badania nad poprawą właściwości użytkowych powłok stalowych natryskiwanych cieplnie poprzez obróbkę cieplno-chemiczną. W pracy przedstawiono wyniki badań powłok natryskiwanych łukowo ze stali odpornych na korozję X46Cr13 i X2Cr-Ni18-9 i następnie azotowanych jarzeniowo. Azotowanie jarzeniowe wykonano na potencjale katody przy następujących parametrach: w temperaturze 450 °C przez 6 h i w temperaturze 530 °C przez 4 h. Opisano oraz przedstawiono wyniki następujących badań: badań metalograficznych, analizy punktowej jakościowej i ilościowej EDS, pomiaru twardości HV, rozkładu twardości, pomiaru parametrów chropowatości, badań odporności na zużycie metodą Amslera. W wyniku badań stwierdzono, że azotowanie jarzeniowe powoduje wzrost twardości oraz odporności na zużycie przez tarcie powłok natryskiwanych cieplnie ze stali odpornych na korozję X46Cr13 i X2CrNi18-9. Technologia hybrydowa łącząca natryskiwanie cieplne stali odpornej na korozję martenzytycznej X46Cr13 i azotowanie jarzeniowe w temperaturze 530 °C przez 4 h zapewnia wytworzenie powłoki o najwyższej twardości i odporności na zużycie ze wszystkich badanych powłok. Powłoka taka może zostać zastosowana do regeneracji części maszyn, od których wymaga się szczególnie wysokich właściwości użytkowych.
Hybrid technologies are one of the directions of materials engineering development. They contribute to the subject of research on improving the performance of thermally sprayed steel coatings by thermo-chemical treatment. The paper presents the test results of arc spraying stainless steel coatings and then glow-discharge nitrided. The glow-discharge nitriding was performed with the following parameters: at 450 °C for 6 hours and at 530 °C for 4 hours. The results of the following tests are described and presented: metallographic (SEM), qualitative and quantitative analysis point EDS, measurement of hardness HV, hardness distribution, measurement of roughness parameters (Ra, Rz), wear resistance by the Amsler method. The results showed that the glow-discharge nitriding increases the hardness and the frictional wear resistance of thermal sprayed stainless steel X46Cr13 and X2CrNi18-9 coatings. The hybrid technology, combining thermal spraying of martensitic stainless steel X46Cr13 and glow-discharge nitriding at 530 °C for 4 hours, provides formation of a coating with the highest hardness and wear resistance of all the tested coatings. This coating can be applied to the regeneration of machine parts, which are required to have particularly high useful properties.
Źródło:
Welding Technology Review; 2018, 90, 9; 13-18
0033-2364
2449-7959
Pojawia się w:
Welding Technology Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Monitorowanie częstotliwości pieca łukowego wykorzystujące technikę fazorową
Monitoring of electric arc furnace frequency using phasor analysis
Autorzy:
Barczentewicz, Szymon
Duda, Krzysztof
Bień, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/266497.pdf
Data publikacji:
2019
Wydawca:
Politechnika Gdańska. Wydział Elektrotechniki i Automatyki
Tematy:
piec łukowy
analiza częstotliwości
synchrofazor
electric arc furnace
frequency analysis
phasor analysis
Opis:
Artykuł prezentuje wyniki eksperymentu wykonanego w hucie stali. System pomiarowy wykorzystany do przeprowadzenia pomiarów jest oparty na systemie czasu rzeczywistego z układem FPGA, który pozwala na wykonanie pomiarów sygnałów analogowych. Trzy fazy napięcia i prądu zostały zmierzone w trzech wybranych punktach sieci zasilającej. Analiza częstotliwości ujawniła ciekawe zjawisko, w którym po wyłączeniu pieca łukowego częstotliwości napięcia i prądu w wewnętrznej części huty zmniejszyła się zamiast zwiększyć, jak można by się spodziewać. To nieoczekiwane zjawisko zostało zarejestrowane z pomocą PMU i potwierdzone przez analizę MatrixPencil. Przeprowadzone pomiary potwierdziły zasadność monitorowania częstotliwości napięcia zasilania pieców łukowych za pomocą analizy fazora.
This paper presents the results of measurement experiment conducted in the operating steel plant. The measurement system was built with real time system with FPGA module, capable of measuring analog signals. Three phase voltages and currents were acquired in three selected points of supplying power network. Frequency analysis of measured signals revealed an interesting phenomenon, as it happened that after switching off the electric arc furnace, the frequency of the supplying voltage and current increased slightly instead of decreasing, as we would normally expect. This abnormal frequency behavior was identified by phasor analysis and also confirmed by DTFT (Discrete Time Fourier Transform) analysis, and MatrixPencil analysis. Performed measurements proved phasor analysis to be a useful application for electric arc furnace frequency monitoring.
Źródło:
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej; 2019, 67; 115-118
1425-5766
2353-1290
Pojawia się w:
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparative fatigue testing of gears with involute and convexoconcave teeth profiles
Porównawcze badania zmęczeniowe przekładni zębatych o ewolwentowym i wklęsło-wypukłym zarysie zębów
Autorzy:
Batsch, M.
Powiązania:
https://bibliotekanauki.pl/articles/175962.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
fatigue testing
Novikov gears
circular-arc gear
convexo-concave tooth profile
badania zmęczeniowe
przekładnie Nowikowa
przekładnie kołowo-łukowe
wklęsło-wypukły zarys zębów
Opis:
Paper presents preliminary comparative fatigue test methodology of convexo-concave Novikov and involute gears. Closed loop power circulation test stand used for experiment was introduced. Moreover the experiment process and adopted criteria of fatigue wear were described. The analysis of results for Novikov and involute gear pair were given.
W pracy przedstawiono metodykę prowadzenia wstępnych badań zmęczeniowych przekładni zębatych o uzębieniu typu Nowikowa i ewolwentowym. Opisano stanowisko mocy krążącej, którą badano. Przyjęto kryterium oceny zużycia zębów oraz scharakteryzowano przebieg eksperymentu. Przeprowadzono analizę wyników badań dla przekładni o zarysie Nowikowa i ewolwentowym.
Źródło:
Advances in Manufacturing Science and Technology; 2016, 40, 2; 5-25
0137-4478
Pojawia się w:
Advances in Manufacturing Science and Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An Oriented Version of the 1-2-3 Conjecture
Autorzy:
Baudon, Olivier
Bensmail, Julien
Sopena, Éric
Powiązania:
https://bibliotekanauki.pl/articles/31339138.pdf
Data publikacji:
2015-02-01
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
oriented graph
neighbour-sum-distinguishing arc-weighting
complexity
1-2-3 Conjecture
Opis:
The well-known 1-2-3 Conjecture addressed by Karoński, Luczak and Thomason asks whether the edges of every undirected graph $G$ with no isolated edge can be assigned weights from {1, 2, 3} so that the sum of incident weights at each vertex yields a proper vertex-colouring of $G$. In this work, we consider a similar problem for oriented graphs. We show that the arcs of every oriented graph \(\overrightarrow{G}\) can be assigned weights from {1, 2, 3} so that every two adjacent vertices of \(\overrightarrow{G}\) receive distinct sums of outgoing weights. This result is tight in the sense that some oriented graphs do not admit such an assignment using the weights from {1, 2} only. We finally prove that deciding whether two weights are sufficient for a given oriented graph is an $\mathsf{NP}$-complete problem. These results also hold for product or list versions of this problem.
Źródło:
Discussiones Mathematicae Graph Theory; 2015, 35, 1; 141-156
2083-5892
Pojawia się w:
Discussiones Mathematicae Graph Theory
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stabilization and solidification of electric arc furnace dust originating from steel industry by using low grade MgO
Autorzy:
Bayraktar, A. C.
Avşar, E.
Toröz, I.
Alp, K.
Hanedar, A.
Powiązania:
https://bibliotekanauki.pl/articles/204760.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
stabilization
solidification
electric arc furnace dust
TCLP
toxicity characteristic leaching procedure
LG MgO
low grade MgO
Opis:
In this study, solidification/stabilization (S/S) of electric arc furnace dust (EAFD) which is generated during the production of steel from scrap metals and classified as hazardous waste were investigated by using different ratios of cement and low grade MgO (LG MgO) as binding agents. Type I PC 42.5 R portland cement and LG MgO which contains 70–80% MgO were used. S/S blocks that contain different ratios of binding agents which have 1/0.5 – 1/1 – 1/2 – 1/3 – 1/4 – 1/5 cement/LG MgO ratio and S/S blocks which contain only cement and no LG MgO agents were prepared. These blocks, which contain 3 different waste ratios according to weight, 20%, 30% and 40% respectively, were produced and exposed to 28-day water purification. At the end of the purification process, S/S blocks were extracted using TCLP (Toxicity Characteristic Leaching Procedure) tests in order to determine the leaching behavior of Zn, Pb, and Cd in S/S blocks. By the end of this study, it was concluded that the recovery of EAFD is possible and applicable by immobilization. The findings of the study concluded that environmental performances or structural properties of blocks contain 30% waste by weight are suitable. This method is a proper one for recovering and treatment of EAFD with mixture of cement and LG MgO.
Źródło:
Archives of Environmental Protection; 2015, 41, 4; 62-66
2083-4772
2083-4810
Pojawia się w:
Archives of Environmental Protection
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Advantages of changing 3-phase ARC furnaces asymmetry estimation criteria in international and european standards
Autorzy:
Białek, J.
Wąsowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/262689.pdf
Data publikacji:
2005
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Tematy:
arc furnaces
current unbalance
impedance asymmetry
power asymmetry
Opis:
The criteria for estimating the asymmetry of arc furnace circuit impedances, referring to the theory of symmetrical components, have been presented. In contrast to the criteria recommended as yet by IEC and CENELEC, they give homogeneous estimation of asymmetry of circuit impedances, heating powers and unbalance of arc currents. Moreover they make it possible to take into account functional dependences among them and, consequently, to improve the analysis of unbalanced operation states of EAF, as well as their balancing.
Źródło:
Electrical Power Quality and Utilisation. Journal; 2005, 11, 1; 93-96
1896-4672
Pojawia się w:
Electrical Power Quality and Utilisation. Journal
Dostawca treści:
Biblioteka Nauki
Artykuł

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