Metall. Res. Technol.
Volume 114, Number 5, 2017
|Number of page(s)||5|
|Published online||30 August 2017|
Effects of mill scales on the combustion characteristics of pulverized coals
School of Metallurgical Engineering, Anhui University of Technology,
Ma'anshan, PR China
2 Key Laboratory of Metallurgical Emission Reduction & Resources Recycling, Ministry of Education, Anhui University of Technology, 243002 Ma'anshan, PR China
Received in final form: 21 February 2017
Accepted: 5 July 2017
The effects of mill scales on the combustion characteristics of pulverized coals, bituminous coal and anthracite are investigated by combustion experiments in a horizontal electric resistance furnace at 900 °C and by thermogravimetric analysis method. The performance of the process is estimated based on combustion rate, ignition temperature and burnout index. It is found that the combustion of pulverized coal can be enhanced by adding mill scales and the optimal addition content for bituminous coal and anthracite are 1% and 1.5%, respectively. With the mill scales addition, the combustion rates of bituminous coal and anthracite are increased by 21.31% and 7.53%, respectively. The results also show that the combustion reactivity of pulverized coals is also improved by mill scales addition. The ignition temperature and burnout index are decreased by 10 °C and increased by 8.03%, respectively, for the combustion of bituminous coal with 1% mill scales addition, and that are decreased by 3 °C and increased by 1.74% for the combustion of anthracite with 1.5% mill scales addition.
Key words: accelerating combustion / mill scales / bituminous coal / anthracite / TGA
© EDP Sciences, 2017
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.