How does the stepped metal sorting machine work?
The basic principle of each stage of the stepped metal sorting machine is that long materials can pass through the gaps and joints of the separator, while granular materials of the same diameter cannot pass through the gap. These devices are placed on a traditional vibratory mining machine to form a single-layer separator.
The wire moves along the top layer of the sorting machine, while the granular material passes through the "fingerboard", falls into the gap, and then enters the next layer. The fingerboard is located above the gap in a parallel direction to prevent metal wires in different directions from falling into the gap. The sorting machine can be used to sort thousands of wet materials, but the sticky particles in the wet materials will have a negative impact on the sorting of wet materials, so it will reduce the processing capacity of the sorting machine and metal grade products.
Single-layer sorting is sufficient for sorting longer metal wires than granular particles, but its processing capacity is not high. With the high output of the metal sorting machine, the granular material will form multiple layers, which may pass through the gap, and the short metal wires will occasionally fall into the gap. Therefore, setting up multi-layer gaps in the step-by-step sorting system is a solution to increase the processing capacity of the sorter and improve the precision of sorting metals. This design is shown in Figure 2. The size and number of layers of the sorter can be determined according to the actual application. When processing granular materials with low metal wire content with high throughput, multiple gaps are required in the horizontal direction. When sorting short wires and requiring high recovery rates, multiple separation layers are required in the vertical direction. .
The biggest feature of the single-layer metal sorter is that the sorting efficiency of a given length of metal wire is not high. One way to optimize the recovery probability curve is to use a step-by-step classification system. As the conveying speed of the metal wire increases (when the feeder has a large amplitude or a large frequency), the probability of the metal passing through the gap increases. The shape of the recovery probability curve depends on two factors: the critical length of the wire (the length is a function of the feed speed) and the structure of the trapezoidal sorting system. These parameters determine the position and slope of the curve.