Sintering is the process by which ash particles bond together to form deposits on fireside surfaces in coal, biomass, and petroleum coke-fired combustion or gasification systems.
Using our high-temperature furnace systems (such as our Deltec furnace or syngas fouling simulator), we now conduct sintering tests as a function of temperature under selected atmospheres and pressures.
To do this, small pellets of ash are prepared, placed in a controlled-atmosphere furnace system, and heated to selected temperatures, in order to observe sintering taking place. The density and strength of the sintered pellet are measured at sleected temperatures that range from the initial sintering to flow of the slag for the baseline ash materials.
These tests can be used to examine low-temperature gas-solid phase-based sintering. An example of a plot of sintered strength versus temperature for three ash types is illustrated in the figure below.