Wyniki wyszukiwania - BazTech

Ograniczanie wyników

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: ash sintering

Sortuj według:

Ogranicz wyniki do:

Dielectric properties of coal ash

González Valdes Laura, Friis Aage Valentin, Nowak-Woźny Dorota

Zeszyty Energetyczne

2018

T. 5

51--60

Mineral matter of coal causes serious operational problems related to ash de- position in coal fired power plants such slagging and fouling, and so it has become the main subject of study in terms of current utilization. Moreover, the standardized tests currently used as the preferred predictive tools for slagging properties of coal sources have been lately reproved in the literature and un- certainties arrive due to the poor repeatability and reproducibility. That is why, methods for determining the sintering temperatures are being extensively investigated across the industry. This study focuses on the electrical properties of coal ash and its relation to the ash sintering process, where physical and chemical processes take part inside the material. The following methodology is based upon the continuous registration of the changes of resistance measured as an AC and DC property. The proposed laboratory stand allows measuring ‘in situ’ a coal ash sample being heated to analyse its electrical properties. It was found that the values measured are temperature dependent and could reflect the chemico-physical changes in the material, which may directly suggest the transformation of the intrinsic properties, giving insight into the sintering process.

Efektywnie zastosowanie popiołów lotnych do produkcji ceramiki budowlanej

Wons W.

Ceramika Budowlana

2011

nr 3

4-9

Popiół lotny wychwytywany jest w elektrociepłowniach ze strumienia gazów przez trzy a czasami cztery strefy elektrofiltrów. Popioły z poszczególnych stref wykazują duże zróżnicowanie fizykochemiczne. Stwierdzono, że popiół wychwytywany w strefie pierwszej (najbliżej kotła) można zastosować jako surowiec do wyrobu ceramiki budowlanej o czerepie porowatym. Natomiast popioły z pozostałych stref, zwłaszcza z trzeciej strefy są potencjalnie dobrymi surowcami do produkcji ceramiki budowlanej o czerepie spieczonym.

Fly ashes are catch at power plants from gases stream by three and sometimes four zones electro-static precipitator. The ashes from different zones exhibit large variations physicochemical. It turns out that the ashes of the first zone can be used as raw material for porous product of ceramics building. While the ashes of the other zones, especially from the third zone are potentially good raw materials for the production of solid product of ceramics building.