L.E.M.
Posted 4/21/ 10:53 (#)
Subject: Rock crushers
SC PA
Does anybody know anything about rock crushers? We have a lot of limestone in the area. Around here farmers will dig a hole, use the dirt to cover the rocks and bury the big ones in the hole. I'm thinking why not crush the rocks and use them for a driveway, fill for a new building, etc?
What does one of these rigs cost? What is the maintenance, up-keep, running cost? Any idea on what is charged for renting a unit like this?
(Jaw Rock Crusher.JPG)
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Jaw Rock Crusher.JPG (59KB - 402 downloads) easymoney
Posted 4/21/ 11:19 (# - in reply to #)
Subject: Re: Rock crushers
ecmn
with that style flywheel that one makes me think it might be a jaw type crusher, they are forgiving if you get a hard rock in there. but be careful its not uncommon to see a large field stone fly straight up in the air out of them and then come straight down. saw a guy get his foot smashed, luckily it didnt land on his head. it was a foot ball sized stone that got sqweezed just right in the jaw and shot up and out of there.
worked on a crusher site for a little while, we had an old jaw crusher and a newer hazmag. the newer one was not built for hard rock, but concrete and asphalt it had an appitite!! i dont consider lime stone a hard rock so i bet a rotor machine would eat it very fast, and for simply getting rid of big rock i would run it at 3" minus and call it good. makes for nice fill for making roads or floors in the machine sheds, field driveways.
for maintenance on them it wasnt to bad, on the rotor you simply flipped or replaced paddles, on the jaw crusher you made sure the distance was correct and did some welding up on them now and again.
the high maintenance part was the screen, we did a lot of 1" minus so you had 2 layers of screens, the top one was a 3" minus if it was big it went around back to the jaw crusher, if it was smaller than 3 but bigger than 1" it went to a roller crusher then back over the screens, at 1" or smaller it went out to the pile.
at the time for us to crush we had a crew of 4 guys, skid steer, 1 large pay loader, an excavator with a jaw to pre process curbs and metal, the generator trailer and the crusher itself. i thought it was about a grand an hour for that crew to run. but in good asphalt and concrete that was clean of trash, we could easily push 300 tons per hour. in that limestone going 3" minus i couldnt see a cat 980 pay loader being able to keep up in feeding the crusher. to make a - ton cone of materail at the end of the day running that product would not be a problem.
Edited by easymoney 4/21/ 11:21
iseedit
Posted 4/21/ 12:54 (# - in reply to #)
Subject: RE: Rock crushers
central - east central Minnesota -central - east central Minnesota -
I think the last I heard of crushers custom rates, right around $1.00 - $1.50 per yard. Of course you need to make a pile to have them come out . . . . Not going to move all that equipment and set up / tear down time for a day job . . . . . . .
Elmfarms
Posted 4/21/ 13:17 (# - in reply to #)
Subject: RE: Rock crushers
Why don't you leave them in the field?
http://www.youtube.com/watch?v=NInDenQl7W4 L.E.M.
Posted 4/21/ 13:32 (# - in reply to #)
Subject: Re: Rock crushers
SC PA
That picture is a jaw crusher. I pulled it off a website. I used that picture to show that I was interested in something portable.
How big of material can you feed into a rotor machine? If we dig it out with a rock breaker on an excavator they could be up to 2'. Ben D, N CA
Posted 4/21/ 16:17 (# - in reply to #)
Subject: RE: Rock crushers
Whiskey, Tango, FoxtrotWhiskey, Tango, Foxtrot
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I used to work on portable crusher plants. Any portable type rock crusher worth having is going to be very expensive. Like you could probably rock ever road on your farm expensive. Any crusher that looks like a real 'deal' is priced so, probably because it is about to need $50,000 worth of wear parts. Sure, it might last you a long time, and it might puke on the first load.
Most stuff is pretty durable and lasts for 10,000 of tons, but when and if it breaks, it is very expensive if your not running it in a production type system. To tell you the truth, I've always been surprised at how affordable good crushed rock is. I'd let someone else worry about buying and maintaining a crusher for what it costs. Pofarmer
Posted 4/21/ 16:23 (# - in reply to #)
Subject: Re: Rock crushers
It is going to take a very big, expensive crusher to take a 2' rock. Hay Hud Ohio
Posted 4/21/ 16:39 (# - in reply to #)
Subject: RE: Rock crushers
SW OhioSW Ohio
Company Bro works for just bought another portable crusher, used, for about 2 million
(with conveyors
) and will probably put another mil in it to get it to work right, but over tons per hour. JohnW
Posted 4/21/ 17:00 (# - in reply to #)
Subject: RE: Rock crushers
NW Washington
There are some tractor mounted rigs like a heavy duty rotary tiller that will crush smaller rocks.
http://www.youtube.com/watch?v=vaEiMs4Jp1E OHKen
Posted 4/21/ 17:08 (# - in reply to #)
Subject: Re: Rock crushers
Ohio
Worked in a plant that builds crushing plants like this. Heavy to move and with that comes all the permits, did I mention expensive ? If the rock can get in the mouth , yes it will crush it , 2' not a problem. Works really well where contractors have to pay to properly dispose of concrete/asphalt debris. And then need to turn around and buy compactable fill. They also work really well down in the pit of quarries. L.E.M.
Posted 4/21/ 18:34 (# - in reply to #)
Subject: RE: Rock crushers
SC PA
Well now you burst my bubble. LOL
I was looking at a website that had them priced from $12,000 on up to over $500,000. I just was thinking about something else to do in the winter. As I travel around the area here I see all these farmers digging the rocks out of their fields. It seems kinda senseless to spend time getting rid of rocks and then paying for crushed stone. I really don't even know what crushed stone costs but I did think it was more than $3/ton if you bought it from the quarry. joe
Posted 4/21/ 20:54 (# - in reply to #)
Subject: RE: Rock crushers
don't walk..............RUN! away as fast as you can. Someonee else mentioned that crushed rock is not priced that bad, believe them. I've done it for the last 37 years and unless you want to secure the correct federal permits, get a mine ID number for MSHA (the aggregate industries OSHA) from the feds and put up with a minimum of one suprise inspection yearly that will make your head spin................................... did I mention, RUN? Then there is the expense to run it yada, yada, yada.
If you can dig it and bury it, use it. If you have to crush it, buy it. Just my opinion.
If you decide to purchase one, best of luck to you.
jimgen
Posted 4/21/ 21:25 (# - in reply to #)
Subject: Re: Rock crushers
central mich
We are a dealaer for aggregate equipment. You would need a complete plant to make crushed stone for driveways. The jaw would be the primary to reduce to 2 in, then you would need to run it through a secondary, generally an impact or roll crusher, all the while screening various sizes so you would need at least a two deck screen.
Or you can buy a complete jaw/roll portable crusher plant. All of it costs several hundred thousands. Most of the plants we deal with have 500kw to kw gen sets for the power source. A 500kw will burn about 34 gallons per hour under 100% load and the kw will burn about 72 gallons per hour under 100% load.
A fairly large jaw is 36"x48" which weighs about 110,000 lbs. just for the bare jawwhich does not include the feeder, trailer, conveyor, motor.
Needs a 200hp motor.
It does not take too much to get a million wrapped up in a crusher spread. joe
Posted 4/21/ 22:33 (# - in reply to #)
Subject: Re: Rock crushers
You work in the Mid West area Jim? L.E.M.
Posted 4/22/ 16:45 (# - in reply to #)
Subject: Re: Rock crushers
SC PA
If you want to learn more, please visit our website crushing equipment.
Well I guess that's the info I was asking for. I had the dream of buying some relic somewhere and fixing it up myself and then running it. I doubt it would see more than 500 ton a year. From what I'm hearing, I guess it's not worth the hassle.
Thanks everyone for your input.
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