scholarly journals Effect of Additives Introduction to Fluxes Manufactured from Ladle Electric Steel Slag

2019 ◽  
Vol 49 (8) ◽  
pp. 504-509
Author(s):  
N. A. Kozyrev ◽  
A. R. Mikhno ◽  
R. E. Kryukov ◽  
A. N. Kalinogorskii ◽  
L. P. Bashchenko
Keyword(s):  
Steel Slag ◽  
Electric Steel ◽  
Effect Of Additives

scholarly journals THE EFFECT OF LONG-TERM STORAGE OF ELECTRIC STEEL SMELTING SLAGS IN DUMPS ON THEIR PROPERTIES

2020 ◽  
pp. 32-39
Author(s):  
Aleksey Pogromskiy ◽  
Tat'yana Anikanova
Keyword(s):  
Raw Materials ◽  
Steel Slag ◽  
Physical And Mechanical Properties ◽  
Road Construction ◽  
Mineral Resources ◽  
Mineralogical Composition ◽  
Electric Steel ◽  
Steel Smelting ◽  
Current Output ◽  
Main Component

construction, repair and reconstruction of roads require high costs of mineral raw materials in the form of sand, gravel, mineral powder. However, its reserves on the territory of our country are distributed unevenly, which causes significant transportation costs for the delivery of mineral resources to construction sites. In addition, mineral resources are inevitably reduced over time, which requires extensive involvement in the construction of roads of non-traditional types of raw materials, as well as industrial waste. The paper presents the results of studies of the properties of electric steel slag, the current output and stored in the dumps for several years. The main component of electric steel-smelting slags, both fresh and dumped, lying in dumps for about 20 years, is shannonite or γ-modification of calcium orthosilicate C2S. It has been established that the mineralogical composition of the Oskol Electrometallurgical Combine's slag is represented by hematite, wuistite, calcite, periclase, and also portlandite, formed during quenching of lime. Analysis of diffractograms of slags of different shelf life shows that in the initial periods of slag storage in the dumps there is a final quenching of lime and its carbonization with the formation of calcite. The results of the determination of the granulometric composition of the slag of different storage periods showed a decrease with time of the number of fine fractions and an increase in large fractions. It is established that when using electric steel-smelting slags in the construction and repair of highways, it is necessary to take into account changes in the physical and mechanical properties of materials. The processes that take place during the maintenance of slags in dumps determine the suitability of the use of slag mineral materials in road construction.

Corrosion Resistance Mechanism of MgO-ZrO2 Brick in RH Degasser Slag

2011 ◽  
Vol 415-417 ◽  
pp. 2048-2052 ◽  
Author(s):  
Song Lin Chen ◽  
Lin Yuan ◽  
Zhong Qi Feng ◽  
Xi Jun Liu ◽  
Jia Lin Sun
Keyword(s):  
Corrosion Resistance ◽  
Steel Slag ◽  
Slag System ◽  
High Ratio ◽  
Slag Viscosity ◽  
Calcium Zirconate ◽  
Electric Steel ◽  
High Concentration ◽  
Slag Corrosion Resistance ◽  
Slag Corrosion

Slag corrosion resistance behavior of MgO-ZrO2 refractory was investigated in this work. The results indicated that in the non-oriented electric steel slag system with a high ratio of calcia to silica, the slag resistance behavior of MgO-ZrO2 composite could be described as follows: the ZrO2 reacts with CaO forming the calcium zirconate compound which is densification encapsulating periclase lay. However, in the oriented electric steel slag system with a high concentration of silica and the low ratio value of calcia to silica, the slag corrosion resistance behavior of MgO-ZrO2 composite is different. The ZrO2 would react with CaO forming the calcium zirconate and simultaneously, one more product C2S as well. C2S has double response of strength and could increase corrosion resistance performance by blinding pore and thickening slag viscosity. Therefore, it is expected to be the major reason for the enhanced corrosion resistance behavior observed for MgO-ZrO2 refractory.

scholarly journals Effect of additives introduction to fluxes manufactured from ladle electric steel slag

2019 ◽  
Vol 62 (8) ◽  
pp. 606-612
Author(s):  
N. A. Kozyrev ◽  
A. R. Mikhno ◽  
R. E. Kryukov ◽  
A. N. Kalinogorskii ◽  
L. P. Bashchenko
Keyword(s):  
Weld Metal ◽  
Rail Steel ◽  
Steel Slag ◽  
Aluminum Production ◽  
Chemical Compositions ◽  
Electric Steel ◽  
Total Oxygen ◽  
Waste Products ◽  
Ladle Slag ◽  
Welding Fluxes

Studies of welding and surfacing fluxes containing ladle slag of electric-steel production of rail steel of JSC “EVRAZ ZSMK” were carried out. Welding under the flux was performed on the samples of sheet steel 09G2S by Sv-08GА wire using the weldingtractor ASAW1250 at exhaust modes. Chemical compositions of welding fluxes and slag crusts were determined. Also chemical composition of the studied welded samples was determined according to GOST 10543 – 98 by x-ray fluorescence method on XRF-1800 spectrometer and by atomic emission method on DFS-71 spectrometer. Metallographic studies were carried out with the use of an optical microscope OLYMPUS GX-51. The content of total oxygen and surface oxygen was studied using the LECO TC–600 analyzer. The possibility of using technogenic waste products of metallurgical production is shown for the production of welding fluxes. The following components were used for production of welding flux: ladle slag of electric steelmaking of rail steel from “EVRAZ ZSMK” JSC; BSK barium-strontium modifier produced under the terms of 1717-001-75073896 – 2005 by “NPK Metallotekhnoprom”; slag of silicomanganese production from “West Siberian steel plant”; electrostatic dust of aluminum production from “RUSAL” (carbonfluor-containing supplement). The studies have shown the suitability of the use of ladle electric steel slag for welding and surfacing of alloyed metal. The introduction of various flux additives reduces the concentration of total oxygen in the weld metal, which in turn increases the toughness. From the point of oxygen concentration in weld metal and impact toughness, it is better to use silica-manganese slag and carbon-fluoride additive as flux additives.

Evaluation of the Fibrin Plate Method for Estimating Plasminogen Activators

1972 ◽  
Vol 28 (01) ◽  
pp. 075-088 ◽  
Author(s):  
N. A Marsh ◽  
C. L Arocha-Pinango
Keyword(s):  
Tranexamic Acid ◽  
Plasminogen Activators ◽  
Heated Plate ◽  
Plasminogen Activation ◽  
Response Curves ◽  
Plate Method ◽  
Single Plate ◽  
Effect Of Additives ◽  
Threefold Increase ◽  
Fibrin Plate

SummaryA study was carried out in order to evaluate the Astrup and Mullertz fibrin plate method for estimating plasminogen activators.Choice of a suitable fibrinogen substrate was found to be the most important factor in setting up a workable assay. Many preparations contained a large proportion of non-clottable protein and plates made from these fibrinogens were usually unreliable. In addition, plasminogen content varied appreciably between preparations so that sensitivity of the method required careful calibration with each new batch of fibrinogen.The effect of additives in the fibrin plate was considered and it was found that calcium chloride alone was sufficient to ensure a stabilised plate which could be stored at 4° C for some time. The addition of tranexamic acid (AMCHA) was found to be a slightly more convenient way of estimating direct proteolytic activity, compared with the traditional heated plate. However neither method distinguished completely between proteolysis and plasminogen activation.In order to improve the precision of the method, the use of an analysis of variance technique has been studied. This technique provides information on the dose-response curves of test and unknown substances, and in addition produces an approximately threefold increase in precision over single plate tests.

Effect of Additives on High Temperature Deformation in Cubic Zirconia (Y-CSZ)

2008 ◽  
Vol 57 (6) ◽  
pp. 543-547
Author(s):  
Takuma WADA ◽  
Takahiro KAKEI ◽  
Hiroyuki HORII ◽  
Takeshi SHIONO ◽  
Yasunori OKAMOTO
Keyword(s):  
High Temperature ◽  
High Temperature Deformation ◽  
Temperature Deformation ◽  
Cubic Zirconia ◽  
Effect Of Additives

Solid State Analysis and Theoretical Explorations on Polymorphic and Hydrate Forms of p-Hydroxybenzaldehyde Isonicotinichydrazone: Effect of Additives on Polymorphic Crystallization

2018 ◽  
Author(s):  
Lincy Tom ◽  
Victoria A. Smolenski ◽  
Jerry P. Jasinski ◽  
M.R. Prathapachandra Kurup
Keyword(s):  
Hirshfeld Surface ◽  
Framework Analysis ◽  
Reaction Conditions ◽  
Space Groups ◽  
Effect Of Additives ◽  
Ft Ir ◽  
Packing Arrangement ◽  
The Stability ◽  
Ir And Raman ◽  
Isonicotinic Hydrazide

The reaction of p-hydroxybenzaldehyde with an equimolar amount of isonicotinic hydrazide afforded two polymorphic and hydrate forms of p-hydroxybenzaldehyde isonicotinichydrazone (HBIH) by varying the experimental reaction conditions. The compounds are fully characterized by means of single crystal and powder diffraction methods, vibrational spectroscopy (FT-IR and Raman), thermal and elemental analysis. The compound crystallizes in three different forms in two different space groups, P21/c (form PA and PB) and Pbca (PC). The Hirshfeld surface analysis shows the differences in the relative contributions of intermolecular interactions to the total Hirshfeld surface area for the HBIH molecules. The calculated pairwise interaction energies (104-116 kJ/mol) can be related to the stability of the crystals. Energy framework analysis identifies the interaction hierarchy and their topology. The geometry and conformation of the three forms are essentially similar which differ only by packing arrangement.

Solid State Analysis and Theoretical Explorations on Polymorphic and Hydrate Forms of p-Hydroxybenzaldehyde Isonicotinichydrazone: Effect of Additives on Polymorphic Crystallization

2018 ◽  
Author(s):  
Lincy Tom ◽  
Victoria A. Smolenski ◽  
Jerry P. Jasinski ◽  
M.R. Prathapachandra Kurup
Keyword(s):  
Hirshfeld Surface ◽  
Framework Analysis ◽  
Reaction Conditions ◽  
Space Groups ◽  
Effect Of Additives ◽  
Ft Ir ◽  
Packing Arrangement ◽  
The Stability ◽  
Ir And Raman ◽  
Isonicotinic Hydrazide

The reaction of p-hydroxybenzaldehyde with an equimolar amount of isonicotinic hydrazide afforded two polymorphic and hydrate forms of p-hydroxybenzaldehyde isonicotinichydrazone (HBIH) by varying the experimental reaction conditions. The compounds are fully characterized by means of single crystal and powder diffraction methods, vibrational spectroscopy (FT-IR and Raman), thermal and elemental analysis. The compound crystallizes in three different forms in two different space groups, P21/c (form PA and PB) and Pbca (PC). The Hirshfeld surface analysis shows the differences in the relative contributions of intermolecular interactions to the total Hirshfeld surface area for the HBIH molecules. The calculated pairwise interaction energies (104-116 kJ/mol) can be related to the stability of the crystals. Energy framework analysis identifies the interaction hierarchy and their topology. The geometry and conformation of the three forms are essentially similar which differ only by packing arrangement.

Properties of nanocomposites based on isotactic polypropylene and high-pressure polyethylene with metal-containing nanofillers

2020 ◽  
pp. 59-64
Author(s):  
N. I. Kurbanova ◽  
◽  
T. M. Gulieva ◽  
N. Ya. Ischenko ◽  
◽  
...  
Keyword(s):  
High Pressure ◽  
Synergistic Effect ◽  
Polymer Matrix ◽  
Isotactic Polypropylene ◽  
Rheological Parameters ◽  
Mechanochemical Method ◽  
X Ray ◽  
Effect Of Additives ◽  
High Pressure Polyethylene ◽  
Properties Of Composites

The effect of additives of nanofillers (NF) containing nanoparticles (NP) of copper oxide, stabilized by a polymer matrix of maleized polyethylene (MPE), obtained by the mechanochemical method, on the properties of composites based on isotactic polypropylene (PP) and high-pressure polyethylene (PE) was studied by X-ray phase (XRD) and thermogravimetric (TGA) analyzes. The enhancement of strength, deformation, and rheological parameters, as well as the thermo-oxidative stability of the obtained nanocomposites was revealed, which, apparently, is due to the synergistic effect of the interaction of copper-containing nanoparticles with anhydride groups of MPE. It is shown that nanocomposites based on PP/PE/NF can be processed both by pressing and injection molding and extrusion, which expands the scope of its application.

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