scholarly journals Unit Ladle-Furnace: Slag Forming Conditions And Stabilization

2017 ◽  
Vol 2 (2) ◽  
pp. 70 ◽  
Author(s):  
Sheshukov O. Yu. ◽  
Nerkasov I.V. ◽  
Mikheenkov M.A. ◽  
Egiazaryan D.K. ◽  
Sivtsov A.V. ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Crushed Stone ◽  
Ladle Furnace ◽  
Refining Slag ◽  
Almost All ◽  
Furnace Slag

<p>Nowadays almost all smelted steel is processed in "ladle-furnace" (LF), where the steel is processed under refining conditions and brought to the desired temperature and chemical composition. Therefore, large amounts of refining slag are formed. Only in Russia there is about 1.4 million tons of slag exported to dumps annually. This slag cannot be processed by the schemes implemented in the industry, since the slag quickly turns into the tiniest dust during solidification and cooling. Such dust is easily aerated and carried by the wind for long distances; it pollutes soils, dissolves in ground, sedimentary and sewage waters. It also pollutes slag dumps that are suitable for processing for crushed stone.</p>

scholarly journals Fundamental Research on Fluorine-Free Ladle Furnace Slag for Axle Steel of Electric Multiple Unit Vehicles

Metals ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1973
Author(s):  
Qing Zhao ◽  
Xiaohui Mei ◽  
Lei Gao ◽  
Jinwen Zhang ◽  
Zhixiang Wang ◽  
...  
Keyword(s):  
Laboratory Tests ◽  
Composition Range ◽  
Ladle Furnace ◽  
Test Results ◽  
Refining Slag ◽  
Fundamental Research ◽  
Multiple Unit ◽  
Scale Test ◽  
Main Components ◽  
Furnace Slag

Fluorine-bearing refining slag (FBS) is used to produce axle steel for electric multiple unit vehicles. To avoid environmental pollution caused by fluorine, a fluorine-free ladle furnace slag (FFS) was designed based on an industrial FBS. The effects of main components on the physical and metallurgical properties of slag were investigated via theoretical analysis and laboratory tests. The composition range of components of the designed FFS are w(CaO) = 40–55 wt.%, w(SiO2) = 2–6 wt.%, w(Al2O3) = 30–40 wt.%, w(MgO) = 6–8 wt.%, and w(CaO)/w(Al2O3) = 1.25–1.50. Industrial-scale test results indicate that the FFS has similar deoxidation and desulfurization capabilities to industrial FBS.

scholarly journals Chemical Stabilization Features Of Ladle Furnace Slag In Ferrous Metallurgy

2017 ◽  
Vol 2 (2) ◽  
pp. 59 ◽  
Author(s):  
Sheshukov O. Yu. ◽  
Mikheenkov M.A. ◽  
Egiazaryan D.K. ◽  
Ovchinnikova L.A. ◽  
Lobanov D.A.
Keyword(s):  
Ferrous Metallurgy ◽  
Chemical Stabilization ◽  
Ladle Furnace ◽  
Refining Slag ◽  
Processing Methods ◽  
High Calcium ◽  
Steel Processing ◽  
High Degree ◽  
Furnace Slag

<p class="TNR">Nowadays due to the application expansion of secondary steel processing methods, which provide high-degree metal desulfurization, a problem of the ladle furnace slag (or high-calcium refining slag) stabilization arose in the ferrous metallurgy. This slag cannot be stabilized because of its self-disintegrating properties.</p>

scholarly journals Formulation, Mechanical Properties and Phase Analysis of Fly Ash Geopolymer with Ladle Furnace Slag Replacement

2021 ◽  
Author(s):  
Ng Hui-Teng ◽  
Heah Cheng-Yong ◽  
Liew Yun-Ming ◽  
Mohd Mustafa Al Bakri Abdullah ◽  
Kong Ern Hun ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Fly Ash ◽  
Phase Analysis ◽  
Ladle Furnace ◽  
Furnace Slag

Ladle furnace slag as a partial replacement of Portland cement

2021 ◽  
Vol 289 ◽  
pp. 123106
Author(s):  
Paulo Araos Henríquez ◽  
Diego Aponte ◽  
Jordi Ibáñez-Insa ◽  
Marilda Barra Bizinotto
Keyword(s):  
Portland Cement ◽  
Partial Replacement ◽  
Ladle Furnace ◽  
Furnace Slag

scholarly journals Research Regarding the Quality of Lambs Carcass Resulted from Tsigaia Purebred Compared with Hybrids of Tsigaia Ewes Crossed with Blanc du Massif Central Rams

2017 ◽  
Vol 74 (1) ◽  
pp. 7
Author(s):  
Mihai Marian BORZAN ◽  
Dana PUSTA ◽  
Liviu BOGDAN ◽  
Alexandra TABARAN ◽  
Attila MATE ◽  
...  
Keyword(s):  
Body Weight ◽  
Chemical Composition ◽  
Massif Central ◽  
Live Body Weight ◽  
Almost All ◽  
Qualitative Characteristics

Abstract: The research aims to compare some qualitative characteristics of purebred Tsigaia lambs and Tsigaia crossed with Blanc du Massif Central lambs. The criteria assessed were: chemical composition of purebred and Tsigaia crossed meat, the live body weight, the slaughtering performance, the weight of different carcass cut. For almost all criteria chosen the crossed individuals registered better results.

scholarly journals Evaluation of Flexural Properties and Characterisation of 10-mm Thin Geopolymer based on Fly Ash and Ladle Furnace Slag

2021 ◽  
Author(s):  
Yong-Sing Ng ◽  
Yun-Ming Liew ◽  
Cheng-Yong Heah ◽  
Mohd Mustafa Al Bakri Abdullah ◽  
Lynette Wei Ling Chan ◽  
...  
Keyword(s):  
Fly Ash ◽  
Flexural Properties ◽  
Ladle Furnace ◽  
Furnace Slag

Epicuticular waxes of the genus Hordeum: a survey of their chemical composition and ultrastructure

1989 ◽  
Vol 67 (11) ◽  
pp. 3219-3226 ◽  
Author(s):  
Bernard R. Baum ◽  
A. Pat Tulloch ◽  
L. Grant Bailey
Keyword(s):  
Chemical Composition ◽  
Discriminant Analysis ◽  
Alcohol Content ◽  
Total Absence ◽  
Average Alcohol ◽  
The Common ◽  
Group 2 ◽  
Whole Plants ◽  
Almost All ◽  
Group 1

This study was based on 148 accessions representing 39 species of Hordeum. SEM ultrastructural morphology of waxes was based on individual spikelets, whereas waxes' chemical composition was assessed from whole plants. When all the data, in the form of individual accessions, were subjected to various cluster analyses methods, no groupings were revealed. But when the data were first summarized by species and then subjected to clustering, two polythetic groups of species were detected. Group 1 is characterized by species with 40–60% average alcohol content and by the common presence of diketones, whereas group 2 is characterized by species with 61 – 80% average alcohol content, by the total absence of hydroxy-β-diketone, and almost all species without β-diketone. The chemical data were then subjected to classificatory discriminant analysis to assess if a single previously unclassified accession could be identified into one of the two groupings. The nature of the differences between the two groupings was described by means of a canonical discriminant analysis. Mostly only plates and filaments were detected, and in many accessions the filaments were widened, appeared platelike, and were characteristic for one group. Presence of β-diketone varied within species. Hordeum violaceum was found to be unique in chemical composition.

Hydration in Mortars Manufactured with Ladle Furnace Slag (LFS) and the Latest Generation of Polymeric Emulsion Admixtures

2018 ◽  
pp. 485-490
Author(s):  
Ángel Rodríguez ◽  
Sara Gutiérrez-González ◽  
Isabel Santamaría-Vicario ◽  
Veronica Calderón ◽  
Carlos Junco ◽  
...  
Keyword(s):  
Ladle Furnace ◽  
Furnace Slag

Modeling of Alteration Behavior on Blended Cementitious Materials

2011 ◽  
Author(s):  
Hitoshi Owada ◽  
Tomoko Ishii ◽  
Mayumi Takazawa ◽  
Hiroyasu Kato ◽  
Hiroyuki Sakamoto ◽  
...  
Keyword(s):  
Blast Furnace ◽  
Fly Ash ◽  
Chemical Composition ◽  
Mineral Composition ◽  
Blast Furnace Slag ◽  
Fine Powder ◽  
Cementitious Materials ◽  
Leaching Tests ◽  
Measured Concentration ◽  
Furnace Slag

A “realistic alteration model” is needed for various cementitious materials. Hypothetical settings of mineral composition calculated based on the chemical composition of cement, such as Atkins’s model, have been used to estimate the alteration of cementitious material. However, model estimates for the concentration of certain elements such as Al and S in leachate have been different from experimental values. In a previous study, we created settings for a mineralogical alteration model by taking the initial chemical composition of cementitious materials from analysis results in experiments and applying their ratios to certain hydrated cement minerals, then added settings for secondary generated minerals in order to account for Ca leaching. This study of alteration estimates for ordinary portland cement (OPC) in groundwater showed that the change in Al and S concentrations in simulated leachate approached values for actual leachate[1]. In the present study, we develop an appropriate mineral alteration model for blended cementitious materials and conduct batch-type leaching experiments that use crushed samples of blast furnace slag cement (BFSC), silica cement (SC), and fly ash cement (FAC). The cement blends in these experiments used OPC blended with blast furnace slag of 70 wt.%, silica cement consisting of an amorphous silica fine powder of 20 wt.%, and fly ash of 30 wt.%. De-ionized water was used as the leaching solution. The solid-liquid ratios in the leaching tests were varied in order to simulate the alteration process of cement hydrates. The compositions of leachate and minerals obtained from leaching tests were compared with those obtained from models using hypothetical settings of mineral composition. We also consider an alteration model that corresponds to the diversity of these materials. As a result of applying the conventional OPC model to blended cementitious materials, the estimated Al concentration in the aqueous solution was significantly different from the measured concentration. We therefore propose an improved model that takes better account of Al behavior by using a more reliable initial mineral model for Al concentration in the solution.

scholarly journals Influences of Bath Chemistry and Plating Variables on Characteristics of Electroless Ni–P Films on Si Wafers from Alkaline Citrate Solutions

2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
Naiming Miao ◽  
Jinjin Jiang ◽  
Wangping Wu
Keyword(s):  
Thermal Stability ◽  
Chemical Composition ◽  
Deposition Rate ◽  
Electroless Nickel ◽  
Monocrystalline Silicon ◽  
P Content ◽  
Almost All ◽  
P Type ◽  
Electroless Ni ◽  
Thermal Stability Of

Electroless nickel–phosphorus (Ni–P) films were produced on the surface of p-type monocrystalline silicon in the alkaline citrate solutions. The influences of bath chemistry and plating variables on the chemical composition, deposition rate, morphology, and thermal stability of electroless Ni–P films on silicon wafers were studied. The as-deposited Ni–P films were almost all medium- and high-P deposits. The concentrations of Ni2+ and citric ions influenced the deposition rate of the films but did not affect P content in the deposits. With increasing H2PO2− content, the P content and deposition rate were steadily increased. The pH and plating temperature had a significant effect on the chemical composition and the deposition rate of the films. The thermal stability of the medium-P film was better than that of the high-P deposit. At the same time, the proposed mechanism of Ni–P films on monocrystalline silicon substrates in the alkaline bath solution was discussed and addressed.

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