id	keyword
ajst-13559	temperature
ajst-13559	ash
ajst-13559	fly
ajst-13559	coal
ajst-13559	melting
ajst-13559	insulation
ajst-13559	feldspar
ajst-13559	gangue
ajst-13559	materials
ajst-13559	fly ash
ajst-13559	potassium
ajst-13559	energy
ajst-13559	melting temperature