Vibrating Feeders are used for a wide variety of applications such as metering and transferring of material from bins, hoppers, silos and storage piles to crusher, screens and belt conveyors and protecting other equipment from impact loads.
Nordberg offers different types of feeders to meet varying requirements. Contact Nordberg for a recommendation concerning your particular feeder application.
The following is a brief description of the Nordberg feeder line . Refer to literature for further details.
vibrating feeder SELECTION
Two steps are required in selecting the proper feeder for a specific installation:
1. Obtaining basic application information.
2. Following a selection procedure.
1. Largest size material in feed.
2. Approximate analysis of material size.
3. Desired capacity.
4. Type and description of material.
5. Type of installation.
Step 1. From Chart I, select feeder width factor appropriate to the application. Multiply the factor by the size of the largest piece in the feed to obtain minimum feeder width.
Step 2. Check the minimum width determined in Step 1 with capacity in Chart II. Note required slope angle to produce desired capacity. If necessary, increase feeder width to obtain desired capacity. There may be several combinations of slope and width which will produce the capacity required.
Factors such as headroom, depth of bed, unit cost, width of conveyor or crusher and future capacity requirements should be considered prior o final selection.
Step 3. Feeder lengths should not be shorter than that needed to retain material at its angle of repose on the feeder pan when the feeder is shut down… plus a 6″ to 12″ safety factor to prevent possibility of free flow. Feeder length must be sufficient to convey the required distance.
Step 4. Select slope angle to best suit required capacity from Chart II and length to retain material angle of repose from illustration B. A sketch drawn to scale showing slope and material repose angles will assist in showing relationship between feeder length and slope.
Step 5. When a four-sided hopper is used, refer to Chart I and illustration B to determine minimum hopper throat opening. Simply multiply the largest material lump size by the hopper throat opening factor to obtain this figure.
Step 6. Make final feeder selection. Often, more than one size and type of feeder will satisfy the application requirements.
The final selection will depend on various factors including:
a. Size and type of crusher when feeding directly to crusher.
b. Conveyor width when feeding in line with material travel.
c. Size of material handled and loading on feeder.
d. Hopper capacity required. With a larger feeder there is more hopper capacity.
e. Headroom available. A sloped feeder normally requires more headroom.
f. Amount of grizzly length required to remove fines.
g. Price. A smaller or lighter duty feeder is less expensive.
h. Future requirements. Will a larger crusher or conveyor be installed? Will plant capacity be increased?