Flow behaviour of crystallising coal ash slags: Shear viscosity, non-Newtonian flow and temperature of critical viscosity
| Autor: | Alexander Y. Ilyushechkin, A. Kondratiev |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Wood gas generator 020209 energy General Chemical Engineering Organic Chemistry Metallurgy Boiler (power generation) Energy Engineering and Power Technology Slag Coal combustion products 02 engineering and technology Combustion law.invention Fuel Technology law Fly ash visual_art 0202 electrical engineering electronic engineering information engineering visual_art.visual_art_medium Newtonian fluid Crystallization |
| Zdroj: | Fuel. 224:783-800 |
| ISSN: | 0016-2361 |
| Popis: | The crystallisation in coal ash slags plays a critical role in coal combustion and gasification. The stable operation of a boiler or entrained-flow gasifier is vitally dependent on the easy, continuous removal of combustion by-products in the form of coal ash slags. Of the factors that govern the flow of a coal ash slag in a reactor, slag viscosity is the most important. Crystallisation affects overall slag behaviour and properties, but its most pronounced effect is on slag flow characteristics. It increases slag viscosity, causes Newtonian slag flow to transition to non-Newtonian, and yields the temperature of critical viscosity. In this paper, we systematically review and analyse the complex effect of crystallisation on these three factors. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect