OOO NVF Kerambet Ogneupor

Saint Petersburg, Russia

OOO NVF Kerambet Ogneupor

Saint Petersburg, Russia

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The effect of nonisothermal heating in a high-temperature dilatometer and isothermal heating in the range 900 – 1600°C on sintering and secondary mullite formation for specimens based on composite composition HCBS, including with refractory clay additions, is studied. Maximum shrinkage values of 0.4 – 1.3% depending on composition are noted with nonisothermal heating up to 1200 – 1250°C or after isothermal firing at 1100 – 1200°C. Specimen growth index (up to 2.0 – 2.5%) after high-temperature firing depends on SiO2 content that indicates the volume of secondary mullite formed. © 2017 Springer Science+Business Media New York


Pivinskii Y.E.,OOO NVF Kerambet Ogneupor | Dyakin P.V.,Saint Petersburg State University
Refractories and Industrial Ceramics | Year: 2015

The effect of firing temperature in the range 1000-1350°C on indices for shrinkage, porosity, density, and strength of specimens based both fuzed quartz HCBS with different fineness, and cast system with a granular filler based upon them, is studied. Maximum indices for ultimate strength in bending are achieved after firing in the range 1200-1250°C. Strength values for different materials are within the limits of 6-9%. With a further increase in firing temperature in spite of an increase in density material strength is reduced as a result of cristobalite formation. It is shown that a fundamental factor governing sintering kinetics is starting fuzed quartz viscosity in the corresponding temperature range. © 2015 Springer Science+Business Media New York.


Pivinskii Y.E.,OOO NVF Kerambet Ogneupor | Dyakin P.V.,Saint Petersburg State University | Perepelitsyn V.A.,OAO Pervoural'sk Dinas Plant
Refractories and Industrial Ceramics | Year: 2015

Chemical composition, physicomechanical properties, mineral composition, and crystallographic properties are specified for high-alumina bauxites (predominantly Chinese) applied to refractory manufacture, prepared by HCBS-technology. Technology is developed for HCBS preparation of composite composition (bauxite + very fine quartz glass, i.e., HCBS) and refractories based on them with improved thermomechanical properties. © 2015 Springer Science+Business Media New York.


Pivinskii Yu.E.,OOO NVF Kerambet Ogneupor | Dyakin P.V.,Saint Petersburg State University
Refractories and Industrial Ceramics | Year: 2010

A mixed highly concentrated suspension with improved rheological properties in the system corundum (89%) - quartz glass (11%) is prepared by combined wet grinding. A semifinished product with a porosity up to 17.5% with an ultimate strength in bending up to 5 MPa is prepared on the basis of it. The effect of heat treatment temperature on material properties is studied. The HCBS composition obtained as a matrix system combined with corundum or high-alumina fillers is promising for the preparation of ceramic concretes. © 2010 Springer Science+Business Media, Inc.


Pivinskii Y.E.,OOO NVF Kerambet Ogneupor
Refractories and Industrial Ceramics | Year: 2015

Chronology is considered for development of research and introductory work in the field of centrifugal casting, implemented in the production of quartz steel-pouring refractories. Large scale application of centrifugal casting is used for the first time in domestic and overseas practice for ceramic and refractory production. The main requirements are considered for original casting systems and regimes making it possible to obtain high density semifinished product. Prospects are shown in a number of examples of using the method in casting objects based on HCBS of other materials. © 2015 Springer Science+Business Media New York


Pivinskii Y.E.,OOO NVF Kerambet Ogneupor
Refractories and Industrial Ceramics | Year: 2015

Comparative evaluation is given for production and application of contemporary quartz steel-pouring ladle refractories for OAO Dinur CBCM production with similar corundum-graphite refractories produced in the Russian Federation by overseas technology using imported equipment. In spite of numerous predictions the actual 45-year practice of continuous improvement of quartz refractories demonstrates their good viability. Good technical and economic efficiency of their production and application is achieved by implementation of HCBS- and ceramic concrete technology with application of unique centrifugal molding used for the first time on an extensive industrial scale. © 2015 Springer Science+Business Media New York


Pivinskii Yu.E.,OOO NVF Kerambet Ogneupor
Refractories and Industrial Ceramics | Year: 2011

In the technology of a number of ceramic and refractory materials, prepared on the basis of highly concentrated ceramic binder suspensions (HCBS), elements of effective nanotechnology were realized even before the present "nanoboom." The concept has been formulated of an advance in materials technology based on HCBS both in traditional fields of their application, and in the field of structural materials science, within which for industrial introduction of existing developments it is necessary to create contemporary equipment formulation for production processes. © 2011 Springer Science+Business Media, Inc.


Pivinskii Yu.E.,OOO NVF Kerambet Ogneupor
Refractories and Industrial Ceramics | Year: 2012

The efficiency of using thinning (deflocculating), plastifying, and strengthening additions in HCBS technology, ceramic concretes, and new unmolded refractories, is demonstrated. Quantitative criteria are proposed for evaluating addition efficiency. In the field of preparing the materials in question the practice of using composite (combined) modifying (deflocculating) additions that have a high synergetic effect predominates. They are distinguished by an electrosteric stabilization mechanism. Solutions or powders, used in the preparation of unfired materials, strengthened by a UKhAKS-mechanism (strengthening by chemical activation of contact bonds), are a special group of additions. © 2012 Springer Science+Business Media, Inc.


Pivinskii Y.E.,OOO NVF Kerambet Ogneupor
Refractories and Industrial Ceramics | Year: 2012

The efficiency of using thinning (deflocculating), plastifying, and strengthening additives in HCBS technology, ceramic concretes, and new unmolded refractories, is demonstrated. Quantitative criteria are proposed for evaluating additive efficiency. In the field of preparing the materials in question the practice of using composite (combined) modifying (deflocculating) additives that have a high synergetic effect predominates. They are distinguished by an electrosteric stabilization mechanism. Solutions or powders, used in the preparation of unfired materials, strengthened by a UKhAKS-mechanism (strengthening by chemical activation of contact bonds), are a special group of additives. © 2012 Springer Science+Business Media, Inc.


Comparative evaluation is given for production and application of contemporary quartz steel-pouring ladle refractories for OAO Dinur CBCM production with similar corundum-graphite refractories produced in the Russian Federation by overseas technology using imported equipment. In spite of numerous predictions the actual 45-year practice of continuous improvement of quartz refractories demonstrates their good viability. Good technical and economic efficiency of their production and application is achieved by implementation of HCBS-and ceramic concrete technology with application of unique centrifugal molding used for the first time on an extensive industrial scale. © 2015 Springer Science+Business Media New York.

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