Abstract: The invention relates to a bulkhead door arrangement for sealingly closing an opening which is located between two mutually adjacent spaces and through which a conveyor belt extends. The arrangement includes a vertically moveable door part provided with a sealing strip on the side thereof facing towards the conveyor belt. When the door arrangement is in its closed position, the door part presses the conveyor belt into abutment with a sealing strip provided in the bottom of the opening, and separate sealing devices abut the side edges of the conveyor belt.

Abstract: A hopper assembly for crushed material such as ore and limestone is provided, comprising a downwardly narrowing hopper having an outlet located at its lower end defined by facing lateral arcuate edges and a discharge chute, the discharge chute including at one end an arcuate portion conforming to the lateral arcuate edges and at another end a straight portion which guides the material discharged from the hopper, the chute including at each lateral edge thereof a deflector plate extending upwardly from the discharge chute positioned at the junction between the straight and arcuate portions, the deflector plates including an upper arcuate edge portion which lies in the same vertical plane as the facing lateral arcuate edges of the hopper and is adjacent thereto, the plate serving to prevent material discharge from the hopper from jamming between the facing lateral arcuate edges of the hopper and the discharge chute.