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Influence Researches of Fused Calcium Hexaluminate Amount on Metal Corrosion Resistance of Alumina Refractories

China's Refractories 2016年第1期25卷 1-6页

作者： Vladimir V. PRIMACHENKO Valeriy V. MARTYNENKO irin. g. shulik Lyudmila N. ZOLOTUKHINA Andrey B. KOVALYOV PJSC "The Ukrainian Research Institute of Refractories named after A.S. Berezhnoy" Kharkiv 61024 Ukraine

Calcium hexaluminate is one from such perspective materials. It is characterized by hig. refractoriness （ above 1 830 ~C ） , as well as properties stability in reducing.atmosphere, hig. alkali- and slag.resistance, low thermal conductivity and wettability by molten metals. In this work influence researches of fused calcium hexaluminate material additive in amount of 5%, 15% amt 25% on the main properties of alumina refractories were carried out. It is established that, the refractories containing.the additive of 25% calcium hexaluminate material are characterized by the hig.est properties, slig.tly impreg.ated with metal melt and the hig.est metal corrosion resistance. The alumina purg.ng.plug. fi）r blowing.of metal with calcium hexaluminate material additive are produced and intended to one metallurg.cal plant of Ukraine for carrying.out tests.

关键词： calcium hexaluminate alumina refracto-ries metal resistance purg.ng.plug.

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Effects of a Combined Silica-containing.Additive on Structural and Rheolog.cal Properties of a Low-cement Silicon Carbide Castable

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China's Refractories 2022年第2期31卷 1-6页

作者： Valeriy V.MARTYNENKO Vladimir V.PRIMACHENKO Pavlo O.KUSHCHENKO Iri na g.shulik Ludmyla K.SAVINA The Ukrainian Research Institute of Refractories named after A.S.Berezhnoy Kharkiv 61024Ukraine

The use of a combined additive consisting.of silica-containing.additives“F”(thinning.and“S”(accelerating.castable hardening.instead of the previously used silica-containing.additive“A”and a mixture of dispersing.additives based on polyethylene g.ycol in low-cement silicon carbide castable allows to improve the castable workability by increasing.in 5.4 times)the flowability of a freshly prepared castable,and increase by 1.2 and 1.1 times the cold crushing.streng.h of heat-treated at temperatures of 110 and 1580°C,respectively,castable samples from low-cement silicon carbide castable with practically equal values of open porosity(15.8%and 16.0%).The petrog.aphic studies of the castable sample microstructure after firin. at a temperature of 1580°C showed that the investig.ted silica-containing.additives“F”and“S”contribute to the denser and more uniform structure *** a result of the carried out research,the manufacturing.technolog. of a low-cement silicon carbide castable was improved,of which the production was mastered at JSC“URIR named after ***”.

关键词： low-cement silicon carbide castable additives flowability structure streng.h

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Advanced Ramming.Mix Based on Fused Zirconia Stabilized by Com-bined Additives of CaO and Mg. for Lining.of Carbon Black Production Reactor

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China's Refractories 2017年第3期26卷 1-7页

作者： Valeriy V.MARTYNENKO Vladimir V.PRIMACHENKO irin. g.shulik Dmitriy A.SHISHKOVSKIY Eleonora L.KARYAKINA Vladimir V.VARg.NOV PJSC "The Ukrainian Research Institute of Refractories named after A.S.Berezhnoy"

Fused materials from ZrO2 stabilized by CaO or Mg., or the combined additive consisting.of CaO and Mg. are made. With using.chemical, petrog.aphic, X-ray phase and electron microscopic researches the main characteristics of these materials are determined. It is shown that, the materials of all compositions have low water absorption; they are characterized by equal struc-ture. The materials stabilized by the combined additive consisting.of CaO and Mg. are presented by g.nerally the cubic phase and a small amount of tetrag.nal and monoclinic ZrO2 phases. Depending.on CaO： Mg. ratio in the materials the tetrag.nal ZrO2 phase settles down in a cubic matrix in the form of separate g.ains, and sites of net like structure in the form of a ＂woven＂ interlacing.（2.9% of CaO and 2. 6% of Mg. ）. An influence of the above mentioned fused stabilized ZrO2 materials and quantity of monoclinic zirconia, on the forming.of zirconia mix on a phosphate bond and properties of＂ .fired samples is studied. The samples from mix based on ZrO2 stabilized by the combined additive consisting.of 2.9% CaO and 2.6% Mg. with 20% of monoclinic Zr02 are characterized by the hig.est properties： after .firin. at 1 580 ~C open porosity of 14. 3% - 14. 8%, apparent density of 4. 67 -4. 69 g.· cm^-5, cold crushing.streng.h of 62 - 68 MPa, thermal shock resistance （ 1 300℃←→air） of 15 thermal cycles, linear g.owth of 0. 2%. The manufacturing.technolog. of powders mix-ture for ramming.mix based on the new fused material .from ZrO2 stabilized by the combined additive is developed and its production is mastered. From this mixture the larg.-size, shaped products on the phosphate bond are made at one carbon black production plant, which are installed in the combustion chamber of the carbon black production reactor.

关键词： fused stabilized zirconia combined additives calcia and mag.esia ramming.mix carbon black production reactor

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