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  • 1
    Electronic Resource
    Electronic Resource
    Mineral-forming processes and wear of the refractories in the roof of open-hearth and two-bath furnaces (1975)
    Springer
    Refractories and industrial ceramics 16 (1975), S. 362-367 
    Details
    ISSN: 1573-9139
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Conclusions An investigation was carried out of worn roof refractories from two-bath and open-hearth furnaces operated with oxygen blow to accelerate smelting. The wear of the roof bricks in these furnaces is caused primarily by a reactive metasomatosis of the primary high-refractory minerals by secondary low-melting ferrospinels of varied composition, and takes the form predominantly of sweating. In accelerated smelting the metasomatosis is essentially of a ferrous nature. The interrelation of mineral formation and wear of the roof refractories depends mainly on the conditions of furnace operation, the principal one being the rate of the oxygen blow in the bath.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01286210
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  • 2
    Electronic Resource
    Electronic Resource
    Properties of microgranular mixtures in the tricomponent system periclase-dunite-chromite obtained by combined grinding (1983)
    Springer
    Refractories and industrial ceramics 24 (1983), S. 499-503 
    Details
    ISSN: 1573-9139
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Conclusions A study was made of the properties of combined grist mixtures of materials in the periclase-dunite-chromite system, the thermomechanical properties of the pressed and cast specimens, and their microstructure after firing at 1600°C. The best hardening effects in the above-pressed specimens were obtained with sodium polyphosphate and periclase powder; and the worst — dunite powder; chromite powder with sodium polyphosphate hardly sets at all. The material is not weakened or embrittled at 800°C and is well sintered at 1600°C. Thus, the σcomp value after firing at 1600°C increases by approximately one order. Casting, compared with pressing, impairs the thermomechanical properties of the specimens, but Δl and α remain practically constant. In order to obtain denser specimens from magnesite concretes it is desirable to use combined grinding of microgranular mixtures of periclase powder with additions of 15–25% dunite, and for volume-constant concretes — with additions of 30–60% chromite.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01386524
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  • 3
    Electronic Resource
    Electronic Resource
    Interaction processes in magnesial concretes in water glass under hardening by a stream of CO2 (1982)
    Springer
    Refractories and industrial ceramics 23 (1982), S. 304-308 
    Details
    ISSN: 1573-9139
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Conclusions On the basis of the results from physicochemical, petrographic, and differential thermal analyses of the hardening of magnesial concretes in water glass with CO2 blown through, a system of interactions between the components of the concretes in the 20–1400°C interval is proposed. The mechanism of the interaction between calcium oxide and water glass with a modulus above unity is refined. Practical recommendations are given on the manufacturing technology of the concretes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01387363
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  • 4
    Electronic Resource
    Electronic Resource
    Interaction of titanium-containing metals with magnesia refractory concretes using water glass (1983)
    Springer
    Refractories and industrial ceramics 24 (1983), S. 300-303 
    Details
    ISSN: 1573-9139
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Conclusions In contact with titanium-containing metals alloyed with aluminum under conditions of high temperatures (1730–1750°C) and high vacuum (2.5·10−6–3.0·10−6MPa) all of the constituent oxides of magnesia concretes using water glass are thermodynamically unstable and are reduced to the metallic liquid or gaseous phase with simultaneous formation of titanium monoxide and alumina-magnesia spinel. With an insignificant rate of evacuation through the voids of the casting molds (as the result of the presence, for example, of a large quantity of liquid phase in the voids) the metal vapors may migrate into the surface layers of the casting and cause the appearance of a defective structure. To increase the quality of castings of titanium-containing metals alloyed with aluminum in casting into molds of magnesia composition concretes using water glass it is necessary to have the minimum content in the contact working layer of the molds of oxides of iron, sodium, and silicon with a simultaneous increase in the content of Al2O3 or MgAl2O4 to retard the reaction of spinel formation at the expense of the aluminum contained in the metal being poured.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01387606
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  • 5
    Electronic Resource
    Electronic Resource
    Dolomites of White Rock deposit (1984)
    Springer
    Refractories and industrial ceramics 25 (1984), S. 283-286 
    Details
    ISSN: 1573-9139
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01395837
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  • 6
    Electronic Resource
    Electronic Resource
    Tests of periclase-carbon refractories in an arc steel-melting furnace (1985)
    Springer
    Refractories and industrial ceramics 26 (1985), S. 571-575 
    Details
    ISSN: 1573-9139
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Conclusions An experimental lot of unfired periclase-carbon parts was produced at Magnesite Combine and tested in a DSP-25 arc steel-melting furnace of the Ural Heavy Machinery Plant. The average wear rate of the experimental parts was 30% less than for PKhS parts and with a decrease in the lining thickness from 460 to 230 mm the wear rate dropped by 2–2.5 times. During service a complex infiltration-metasomatic zonality is formed. The metasomatism has an iron-silicate character. In contrast to normal magnesia-spinellide parts (PShS, MKhS, PKhS) after service under similar conditions the periclase-carbon refractories have about a three or four times less total thickness of the working zones. In addition in the periclase-carbon parts there is no transition zone in which in normal parts (PKhS) loosening of the structure and the formation of micro- and macrocracks leading to spalling of the lining occur. The wear of the periclase-carbon parts occurs primarily by fusion of the decarburized subzone of the working zone and of the scorified crust penetrated by silicates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01386470
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  • 7
    Electronic Resource
    Electronic Resource
    Vapor-phase recrystallization (Redeposition) processes in periclase-carbon products (1987)
    Springer
    Refractories and industrial ceramics 28 (1987), S. 306-309 
    Details
    ISSN: 1573-9139
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Conclusions We studied the mechanism of vapor-phase recrystallization of periclase and forsterite in the periclase-carbon products during rapid heating in air up to 1710–1720°. The formation of secondary crystals of periclase and forsterite occurs from the gaseous phase simultaneously with their crystallization in the form of filamentary and dendritic crystals in the developed cavity and with recrystallization of isometric periclase.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01399445
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  • 8
    Electronic Resource
    Electronic Resource
    Use of a silica coating for hot tops in teeming rail steel (1985)
    Springer
    Refractories and industrial ceramics 26 (1985), S. 53-57 
    Details
    ISSN: 1573-9139
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01398617
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  • 9
    Electronic Resource
    Electronic Resource
    Periclase-carbon articles made from production waste obtained from electrotechnical periclase (1988)
    Springer
    Refractories and industrial ceramics 29 (1988), S. 667-671 
    Details
    ISSN: 1573-9139
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Conclusions Waste from the production of electrotechnical periclase consists of high-quality material with a concentration of 98% magnesia, heat processed at different temperatures with Δmcalc of note more than 0.3%. In order to organize the complete waste-free production of electrotechnical periclase its waste should be used for making periclase-carbon concrete articles using the technology developed by the East Institute of Refractorires. Experimental periclase-carbon articles prepared at the Experimental factory of the Institute were tested in the lining of a 100-ton electric steel-melting furnace at OKhMK; they showed the same resistance as fired PKhS articles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01280332
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  • 10
    Electronic Resource
    Electronic Resource
    Mineral composition and microstructure of brucite from the Kul'dursk deposits (1988)
    Springer
    Refractories and industrial ceramics 29 (1988), S. 155-161 
    Details
    ISSN: 1573-9139
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Conclusions A complex investigation was made of the substance composition of commercial brucite raw materials at the Kul'dursk deposits. We established the polymineral composition of the varities of brucite and the assessory (impurity) rocks. It is shown that the predominant mass of the mined raw material corresponds to a mixture of brucite of 2nd and 3rd grades. The macrophysical properties of the brucite and the commonest impurity rocks (calciphyr) on the whole are similar, which excludes the possibility of their effective visual separation. We confirmed the conclusions made by the Geological Services of the Bogdanovich Production Association for the Manufacture of Refractory Materials about the noncorrespondence of the technological sorts of brucites with the natural varieties. In connection with the increase in the concentration of CaO and SiO2, it is necessary to develop highly effective methods of obtaining monomineral brucite concentrate, specifying all-around use of this unique mineral raw material.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01389549
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