Influence of Dust Container Design on the Minimum Ignition Temperature of Dust Clouds in a Godbert–Greenwald Furnace

The present study focuses on the experimental evaluation of the minimum ignition temperature (MIT) of dispersed dust in a Godbert–Greenwald furnace. The aim of this article is to assess the influence of dust container design on MIT determination. Two container configurations were evaluated: a standard dust container and a modified conical dust container. Experiments were carried out using various dust types, sample masses, and dispersion air pressures. The results indicate that container geometry has a significant effect on dust cloud homogeneity, combustion stability, and the measured MIT values. Difference between MIT values is up to 30–40 K. The conical container consistently produced lower and less variable MIT values (difference up to 110 K), suggesting a more efficient and reproducible formation of dust cloud. The difference of MIT in standard dust container is up to 220 K. The observed differences are discussed in relation to the dust cloud formation within the furnace.