- Q: What’s the best size of biomass fuel pellet? How to choose the hole diameter of ring die? Why the diameter of the pellet fuel on the market is most 6~8mm? Small pellets may be more suitable for small stove or furnace. But is used in large or industrial boiler, isn’t it better to make the pellets a bit bigger, such as 8~12 mm? Dose larger pellet size means lower energy consumption?
A: The diameter of pellets cannot be determined as you like. It is explicitly stipulated in the international Swedish Pellets Standard that the diameter of biomass pellets can be 6mm and 8mm. You can make other size of pellets I you want. And most ring die pellet machines on the market are capable to make pellets with several different diameters. But if you make pellets for selling, especially for export, it is important to know the stipulation about pellet diameter in the place of sale. Pellets not conform to the standard can’t be hot sale anyway. Everything happens for a reason. So if you want your pellets sell like hot cakes, don’t run counter to the international standard! However, if you just want to make small scale fuel pellets at home to your own for heating or cooking, you can make any size of pellets as you like and as it is convenient for you to use.
