P D Refractories CZ

Velké Opatovice, Czech Republic

P D Refractories CZ

Velké Opatovice, Czech Republic
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Tvrdik L.,P D Refractories CZ | Bajus S.,R.Ø.S.A. | Sticha T.,R.Ø.S.A. | Lang K.,P D Refractories CZ
InterCeram: International Ceramic Review | Year: 2011

The Claus reactor as a device connected to the process of coal production (coke) and oil production (refinery) is a relatively widespread method of production of sulphur by treatment of exhaled gases. Many such facilities operate in Central Europe, and it is clear that the approaches to the process, both structural and in terms of the use of refractory linings, are varied. This article pays particular attention to various possibilities in terms of the application of refractory materials, power and technological parameters. The theoretical basis is also concerned with the description of the processes that take place in this institution during the production of sulphur. Finally, it describes experiences with different modes of Claus units operating in the Czech and Slovak Republics.


Ptacek P.,Brno University of Technology | Lang K.,P D Refractories CZ | Soukal F.,Brno University of Technology | Opravil T.,Brno University of Technology | And 2 more authors.
Powder Technology | Year: 2014

The effective method for preparation and stabilization of nanostructured ceramic foam from kaolinite is described in this work. The technique is based on the redistribution of particles from original kaolinite aggregates and on the formation of solid framework of aqueous foams stabilized by surfactants. This process is spontaneous and highly effective as the surface energy of the system decreases and provides the driving force for rearrangement of solid phase in foam. The stability of these structures is time-limited, as water flowing from the bubble walls reduces their thickness. Therefore the structure of foam must be stabilized by the materials absorbing water physically or by formation of hydrates. The following high-temperature treatment provides solid foam prepared by sintering and having certain mechanical strength. The foams of bubble walls thickness within the nanometers scale can be prepared by this method hence the thickness of wall is considerably smaller than the median of particle size of original kaolinite. © 2013 Elsevier B.V.


Kovar P.,P D Refractories CZ | Lang K.,P D Refractories CZ | Tvrdik L.,P D Refractories CZ | Nevrivova L.,Brno University of Technology
InterCeram: International Ceramic Review | Year: 2014

Density of refractories significantly affects their properties in terms of both their physical and mechanical properties, and corrosion resistance in general. The increase in utility properties, especially resistance to corrosion, is possible not only through the use of appropriate raw material composition but also by attaining lower porosity and higher density refractory material, which reduces the infiltration of unwanted elements into the structure of the refractory material. Influence density refractory material on their final properties is described by several examples. In the petrochemical industry there is a quality mark A60SLP based on andalusite, in the cement industry for lining of rotary kilns is the material ARS60SLP is used and in the glass industry the quality mark A75MEG is designated.


Ptacek P.,Brno University of Technology | Lang K.,P D Refractories CZ | Soukal F.,Brno University of Technology | Opravil T.,Brno University of Technology | And 2 more authors.
Journal of the European Ceramic Society | Year: 2014

The effective method of preparation, stabilization and high temperature treatment of enstatite ceramic foam is described in this work. The technique is based on foaming of suspension of talc, on the stabilization of foam structure and on final high temperature treatment after drying. The spontaneous delamination of aggregates and the redistribution of talc particles in foam are driven by decreasing surface energy. The changes of phase composition as well as the mechanism and the kinetics of processes which take place during the thermal treatment were described. The treatment within the temperature range from 1150 to 1250 °C provides the ceramic foam via sintering without melted phase, whereas a liquid phase sintering occurs at higher temperatures. The final temperature of sintering is 1300 °C. Increasing amount of melted phase supports the formation of enclosed porosity and formed glass stabilizes the high temperature protoenstatite polymorph in the foam. © 2013 Elsevier Ltd.


Kotoucek M.,P D Refractories CZ | Kovarr P.,P D Refractories CZ | Lang K.,P D Refractories CZ | Nevrrrivova L.,VUT FAST
InterCeram: International Ceramic Review | Year: 2011

Within each furnace aggregate lining, one or more refractory insulation layers can be found. For this reason all refractory materials producers try to provide both dense and lightweight products. The demand for better thermal insulation materials grows, due to the efforts of furnace operators to lower energy consumption of firings. Lower density and better insulating materials are in high demand. This paper deals with thermal insulation silica bricks; it describes their application in the glass and smelting industries. It informs about history, up-to-date products and new developing trends at P-D Refractories CZ a.s.


Dvorak S.,P D REFRACTORIES CZ | Lang K.,P D REFRACTORIES CZ | Vasica L.,P D REFRACTORIES CZ
AISTech - Iron and Steel Technology Conference Proceedings | Year: 2015

Refractory products from silica are irreplaceable in furnace linings for production of coke as well as in many other industrial thermal aggregates.Silica bricks in all these aggregates are subject to intensive thermal and mechanical stress. Therefore, a high quality of used lining materials is a precondition for reliable and long service life of the above-mentioned facilities. That is why all silica manufacturers strive to continually improve qualitative parameters of their products, and they sometimes reach better parameters than it is prescribed by internationally accepted quality standards. This is also the case of P-D Refractories CZ, a.s. The goal of this paper was to present information on one of the result of this development. The result of this effort is a production of high-density silica bricks, which rests on careful selection of initial silica raw material, optimization of usual technological procedures and use of new binding and mineralization agents on the basis of selected calcium salts. In addition to high density, a new product is characterized by high chemical purity and other related characteristics, the level of which considerably exceeds usual requirements for characteristics of silica for linings of coke batteries. It will be shown very soon how potential customers will react in near future to a new product presented. From the lesson learned it can be assumed that silica bricks with higher density structure and better thermo-mechanical properties should be suitable for users. We believe and assume that coke ovens with silica lining produced by an streamlined technology should bring more benefits to their users. AISTech 2015 Proceedings © 2015 by AIST.

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