northernmainecoal wrote:I've started building a bin that will hold about 3 tons. I have a 4" grain auger located in the bottom of the bin to feed the hopper my EFM feeds from. The grain auger has a 1hp farm duty motor on it, is it going to be able to start turning with that much weight on it?? Or do I need to build some sort of V thing over the top of it to limit the weight?
About your bin;
Is the discharge end secured solid at the head end?
I ask because an uager will want to dig in to the pile.
The other issue is the bin bottom, please fo not take this as a
critisism, but with my experience in mining and bins the issue is
always what is refewrred to as the draw point.
In following EFM's excellent drawings you need to raise the bin up to
make a modified dog house and leave the auger totally exposed in the
pile rather than drawing it down to the base of the inverted pyramid.
As the auger is unguarded it will want to dig and dig and dig rather
than just auger because it has no cage to keep it off the floor as the
auger will want to pull the tube and auger down even with the hole
in the front.
I would raise the bin a foot above the auger and block it up and then
attach the auger tube to the sides with pipe strap to hold it up above
the floor about a foot to reduce any stress on the auger and tube OR
simply raise the auger and the bin in a one foot increment and sacrifice
the coal below it to to simply create a pile below the auger allow it to run
It works with grain and always has worked to convey small granular materials
creating a permanent pile to feed the auger.
As it is the amount of restriction created by the inverted cone at the bottom will
create a lot of grinding as the coal is drawn down.