Showing papers on "Material flow published in 1975"

Analytical Solution for Real Cascade Equation in Steady State

Abstract: Steady state real cascades are analyzed. The method adopted is based on two difference equation representing the conservation of the total flow and the desired material flow, respectively. Introducing what is termed the “desired material flow cut” as a stage parameter corresponding to the “total flow cut” or “cut”, the flow relations of the desired material flow are reduced to the same form as that of the total flow rate. The flow rate is not subject to any restrictive assumption except the conservation of mass flow, so that the method can be applied to almost any type of real cascade with side flows and losses. Adoption of a suitable iterative calculation will permit this treatment to deal with cascades constituted of separators with large values of separation factor without resorting to approximation, because the “desired material flow cut” of each stage is described exactly by the separation factors of each stage. The difference equations are solved analytically, for which the determinants B(i,j) and D...

Bag packing apparatus

Abstract: A bag packing apparatus is described having an operating cycle which includes a fill mode of operation and a dwell mode of operation. A powdered or finely granulated material which is to be bagged is contained in a storage means and an elongated material outlet spout communicates with the storage means. Means are provided for conveying the material from the storage means to the spout and for causing the material to flow from the spout. The apparatus further includes a means for supplying and positioning an empty bag about the spout and for discharging a filled bag from the spout during a dwell mode of operation. A first material flow control means cyclically enables the discharge of material from the spout into the bag during the fill mode and disables the flow of material from the spout during the dwell mode. A second material flow control means is also provided including a switch which is positioned at the spout and is adapted for engagement by a bag which is positioned at the spout. The second material control means is arranged for disabling the flow of material after the initiation of the fill mode when a bag becomes disengaged from the switch.

Linear filtering applied to safeguards of nuclear material

Abstract: In regard to the problem of nuclear materials theft or diversion in the fuel cycle, a method is needed to detect continual thefts of relatively small amounts of material. It is suggested that Kalman filtering techniques be used. A hypothetical material flow situation is used to illustrate the technique; losses could be detected in as few as 5 months. (DLC)

Bulk material flow distribution system - point material forms cone shaped pile in free fall onto flat circular distributor

Abstract: Flow distribution system for bulk materials capable of running in conveyor guided installations, with a defined angle of slope The delivery edge of the horizontal floor of the distribution system has a circular shape and the striking point of the material flow on the formed pile of material is located at such a distance from the centre of the circle of the circular delivery edge that the connection of the centre point with both end points of the material flow striking point on the pile forms a circular segment at the striking point results in the desired widening of the material flow on the receiving apparatus