Abstract: Apparatus is provided for depositing solid particulate material in a frustoconical pile within a space of predetermined dimensions comprising, in combination:(a) a screw conveyor for particulate material arranged substantially horizontally;(b) means for feeding particulate material to the screw conveyor;(c) the screw conveyor having a screw mounted at one end for driven rotation and operatively disposed in the screw conveyor for receiving and transporting particulate material therealong;(d) means for depositing particulate material conveyed by the screw conveyor as a pile below the conveyor up to a maximum height corresponding to the level of the screw;(e) the screw being arranged when maximum pile height is reached to carry particulate material at its level along the top of the pile to an outer edge thereof for deposit there, thereby leveling off the top of the pile and maintaining a frustoconical shape in the pile, while ensuring spreading of the pile of particulate material throughout and within a space of