| Autor: |
Šveda, Mikuláš, Komora, Ladislav |
| Zdroj: |
Waste Forum; 2011, Vol. 2011 Issue 3, p179-184, 6p |
| Abstrakt: |
The chemical industry is a producer of large quantities of waste, which can have negative impact on the environment. The ceramic industry is one of possible fields where this waste can be used as a raw material. In the first half of the nineties of the 20th century within the context of cooperation between Research Institute of Petrochemistry in Prievidza and Department of Material Engineering of the Faculty of Civil Engineering in Bratislava developed a chemical additive based on condensates of aldehydes (polyelectrolytes) which was given a business name VUPPOR 1. The application of this additive into the raw brick matter enabled positive to affect some technological processes and properties. The negative aspect of this additive was not only price, but also that in the drying process at temperatures above 70 °C led to a release of ammonia. For this reason, its application was possible only in the channel or in the tunnel dryer. Based on the requirements of manufacturers of brick products for building external cladding, who necessarily needed to improve the thermal properties of their products, (cooperation as mentioned above between the Research Institute for Petrochemistry in Prievidza and the Department of Material Engineering at the Faculty of Civil Engineering in Bratislava) was developed a new chemical additive - VUPPOR 2. This additive was prepared by modification of secondary raw materials from the chemical industry in order to obtain an additive of similar properties as the original VUPPOR which would also be more cost-effective, environmentally-friendly and applicable in all types of dryers. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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