Picture 3 is a close-up. Note the cant of the blades. When run forward the blades provide a good mixing action and will handle a fairly large load. When run in reverse the blades provide a squeezing action for mulling. But as the mulling consumes a lot of power load capacity will be reduced. I cast in Petrobond and found that mixing was adequate with a mull around the 10th cycle of sand. If making new petrobond from scratch, you must mull it for around 20 minutes to activate the petrobond.
Picture 4 shows the drive train. The gear box is a 40:1 worm gear.
Picture 7 shows the dump arrangement.
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