Thanks Jason. I though I aught to review some stuff I haven't mentioned in a while. Most people won't go back scores of videos to see what's there. Departing for NY next week. Should be doing some e-waste recycling as well as prospecting. Should be some great videos. Good hunting up there. Say hi to Jen from us.
Great video Keith! One note -- 1/8" screen (0.125" opening) != #8 mesh (US Std. 0.0937" opening) because the wires forming the mesh have thickness. In fact, without specifying the wire thickness, an 8 mesh screen could have openings from just over .100" to under .020" depending on the diameter of the wires and the weave.
You're absolutely right. Sometimes I oversimplify for ease of understanding, sometimes just by accident. Thanks for the input. Looks like I will be prospecting in New York this summer. How's that for an unusual location? :-) Got a viewer with some spots there and he is also recycling e-scrap. Should make some good videos. Also have an invite to Mali, and a possible to Borneo. Life is getting interesting...
@@hardrockuniversity7283 this rejected material will be used in Balling of green balls again.So fresh material along with this recycled material will be feeded to balling disc ,which disturbs the balling shape and balling quality
Stoody 31 hardfacing electrode, stick welding. More wear by far on the moving jaw. I hard face both jaws, but the stationary jaw last three times as long between re-facing.
Yeah Quarts is really savage on the gear ,being around 7 on the Mohs scale for hardness it,gauges into steel real bad , yes hard facing ,is good ,but i wonder ,and iv'e not tried this myself ,but if you heat steel to cherry red and then quench it , it will harden it ,but it might also make it more brittle ,just a thought ,maybe could try on the impact mill tips ,or on the jaw crushers jaws , Great video ,thanks again for sharing ,cheers .
Keith, I’m thinking about building a jaw crusher and an impact mill , I notice your impact mill uses vanes to do the grinding. What do you think of using carbon steel hardened chain? Would they wear better than the vanes? I have some 1/8” AR 500 steel plate to line the inside of the impact mill. One big question on the impact mill is how do they keep the grit out of the shaft bearings? I know the dust will work it’s way through sealed bearings fairly quickly.
I have no experience with chain mills so my info is somewhat theoretical here. My mill is set up to maximize the blower effect of the impactors to create a draft for the air classification system. I do not know how well chains will work for that. In order to get natural draft the input opening has to be near the shaft (therefore on an end) and the discharge on the perimeter top somewhere to allow oversize to drop back for re-grind. If there is not enough natural draft, a shop vac can be used for that purpose. Good industrial bearings designed for dirty environments should have a proper labyrinth seal that will allow long use in the dust, but even then, a draft will pull clean air in at the shaft and keep the area immediately outside relatively dust free. The drive should have some sort of engineered failure point in case of catastrophic failure inside the housing. If a belt drive, it is naturally provided by the belt to pulley 'friction clutch effect'. If not, a shear pin of keyed shaft can protect the expensive motor. Chain impactors cannot be hard faced, but are quick to replace and easy to fabricate. Steel bars instead would provide a hard faceable alternative in high wear environments. Any impactors should have a way of 'giving' in case of a jam. A chain or hammer mill has it naturally. Keith
Have you had any assays done? Have you tried my panning technique for micro fine gold? Unless it is extraordinarily rich, the gold will be very small, but can still be enough to make a profit.
Great information man👍🌟
YeeeeeeeeeeHaaaaaaaaaaa
Thank you. I'n trying. :-)
One more on basic milling theory and then off to New York for some interesting adventures.
@@DAVIDBUCKLE-TASMANIA how's she gannan?
Excellent video. One of your best yet
Thanks Jason. I though I aught to review some stuff I haven't mentioned in a while. Most people won't go back scores of videos to see what's there. Departing for NY next week. Should be doing some e-waste recycling as well as prospecting. Should be some great videos.
Good hunting up there. Say hi to Jen from us.
Great video Keith!
One note -- 1/8" screen (0.125" opening) != #8 mesh (US Std. 0.0937" opening) because the wires forming the mesh have thickness.
In fact, without specifying the wire thickness, an 8 mesh screen could have openings from just over .100" to under .020" depending on the diameter of the wires and the weave.
You're absolutely right. Sometimes I oversimplify for ease of understanding, sometimes just by accident. Thanks for the input.
Looks like I will be prospecting in New York this summer. How's that for an unusual location? :-)
Got a viewer with some spots there and he is also recycling e-scrap. Should make some good videos. Also have an invite to Mali, and a possible to Borneo. Life is getting interesting...
Is there any shredder/fluffer for Iron ore Green ball with moisture 11%
Pellets
Are you trying to crush them? What is the end purpose and the size needed? What is the starting size?
@@hardrockuniversity7283 size will be 9-18mm with moisture 10-11%,It should be disintegrated
@@hardrockuniversity7283 this rejected material will be used in Balling of green balls again.So fresh material along with this recycled material will be feeded to balling disc ,which disturbs the balling shape and balling quality
Thanks for the video.
You're welcome. I hope it was useful.
What welding rods do you use to 'hard face' your jaws? Do you see more wear on the moving jaw or do you hard face both jaws?
Stoody 31 hardfacing electrode, stick welding.
More wear by far on the moving jaw.
I hard face both jaws, but the stationary jaw last three times as long between re-facing.
@@hardrockuniversity7283 Thanks much for the prompt & precise reply.
@@peteraska868 You're welcome. I enjoy helping.
Yeah Quarts is really savage on the gear ,being around 7 on the Mohs scale for hardness it,gauges into steel real bad , yes hard facing ,is good ,but i wonder ,and iv'e not tried this myself ,but if you heat steel to cherry red and then quench it , it will harden it ,but it might also make it more brittle ,just a thought ,maybe could try on the impact mill tips ,or on the jaw crushers jaws , Great video ,thanks again for sharing ,cheers .
The jaws are high alloy and heat treated. They still wear out in a shift with hard quartz.
Keith, I’m thinking about building a jaw crusher and an impact mill , I notice your impact mill uses vanes to do the grinding. What do you think of using carbon steel hardened chain? Would they wear better than the vanes? I have some 1/8” AR 500 steel plate to line the inside of the impact mill.
One big question on the impact mill is how do they keep the grit out of the shaft bearings? I know the dust will work it’s way through sealed bearings fairly quickly.
I have no experience with chain mills so my info is somewhat theoretical here. My mill is set up to maximize the blower effect of the impactors to create a draft for the air classification system. I do not know how well chains will work for that. In order to get natural draft the input opening has to be near the shaft (therefore on an end) and the discharge on the perimeter top somewhere to allow oversize to drop back for re-grind. If there is not enough natural draft, a shop vac can be used for that purpose.
Good industrial bearings designed for dirty environments should have a proper labyrinth seal that will allow long use in the dust, but even then, a draft will pull clean air in at the shaft and keep the area immediately outside relatively dust free.
The drive should have some sort of engineered failure point in case of catastrophic failure inside the housing. If a belt drive, it is naturally provided by the belt to pulley 'friction clutch effect'. If not, a shear pin of keyed shaft can protect the expensive motor.
Chain impactors cannot be hard faced, but are quick to replace and easy to fabricate. Steel bars instead would provide a hard faceable alternative in high wear environments. Any impactors should have a way of 'giving' in case of a jam. A chain or hammer mill has it naturally.
Keith
Crushers, OK I've got those. Still no gold. I probably have sulfide ore. Just my luck.
Have you had any assays done? Have you tried my panning technique for micro fine gold? Unless it is extraordinarily rich, the gold will be very small, but can still be enough to make a profit.
First YeeeeeeeeHaaaaaaaaa
Yeeeeeeeeeeeeeeehaaaaaaaaaaaa