Non-Chemical Freezing fiber processors?

[macfixer01]

All this frigid weather has me wondering... Has anyone considered whether it would help to freeze fiber processors in say liquid nitrogen, to make them brittle before crushing or grinding them?

My friend built himself a charcoal grinder for fireworks use, from a used kitchen garbage disposal. He mounted it on a stand, bypassed the thermal shutoff, and added a cooling fan blowing on the motor. Then he rigged up a sealed 5 gallon catch bucket to the side output, and a piece of PVC pipe for a filler neck. Just wondering what something like that might do with frozen processors?

macfixer01

 

[goldsilverpro]

There are patents using liquid nitrogen and then grinding the scrap. In the early '70's, the refiners talked it up and played with it, but I don't remember any big operations. I think someone had a setup on a truck.

 

[Lou]

Eh, I don't know how useful it would be. LN2 isn't cheap, it's about 3 bucks a gallon from Linde (what I pay). Only way I can see it useful is if you cooled it down before the LN2 as much as possible with another cooling process.

 

[Shaul]

Yeah, maybe Steve could try running them through his paper shredder.

 

[lazersteve]

Mike,

If you remove the heat spreaders with a heat gun, then soak them in AP for about 3 days. They soften up enough to peel apart with a sharp knife. At this stage they should shred pretty easily.

I've found that removing the head spreader and solder from the thru holes with AP leaves them pretty vunerable to attack. :twisted:

Let me know what you come up with, I've got hordes of them I've been saving for a rainy day.

Steve

 

[Joe]

I remember looking at one of the recycling links somebody posted on here. The researchers mixed alcohol with dry ice (a lot of things aside from alcohol could be used). Things can be cooled to about -80 F with the mixture. They went to scrap yard and put all kinds of stuff in it like tires and electric motor windings and then tried to shatter it with a hammer (sounds like a fun use of grant money!!). As I recall it didn't work well with rubber or aluminum, but it would shatter the steel casing around copper windings. It seems like a process that could be set up in the garage inexpensively. It seems like it might work on things like flatpacks and plastics. I have several pounds of header pin connections that I would like to it on.

 

[skippy]

I wonder how cold you could get an alcohol bath if you had the coils from a dehumidifier or air conditioner in it. Any thoughts?

 

[Joe]

Skippy, I'm not sure I'm following your thought. I understand that you want to use regrigerant coils to cool the alcohol. I don't think that would work because refigerant probably doesn't get cold enough.
For clarity on my end: The concept is that carbon dioxide freezes at something like -110 farenheit. Alcohol freezes at about -120 farehnheit. Adding a liquid to the dry ice with a low freezing point is like adding salt to ice. One can maintain a liquid at a much lower point. The liquid is like a super conductor and drops the temperature of the submersed object to that near the melting point of (in this case) carbon dioxide.
I'm gonna try it sometime if for nothing else, kicks!

 

[lazersteve]

If you are wanting to test the freeze and shatter theory it's easy enough to freeze a cpu. In electronics repair we use what's known as freeze spray. The purpose of the spray is to lower the ambient operating temperature of the suspect component to determine if it works properly (or improperly) as the temperature is changed.

This spray can be found at any electronics supply house.

You could freeze the part and see if it will shatter. I would guess it won't as the spray is used in the above mentioned test and the good chips that get freeze sprayed still operate normally after spraying.

Maybe with extremely low temperature and/ or a good smack the situation may be different.

For the fiber CPUs I think a solvent that dissolves epoxies and fiberglass would be optimum choice. You need to remember that the cpus are designed to withstand harsh environments and still operate properly. The higher tech the component the more rugged it is designed.

Steve

 

[skippy]

Joe you're right my post wasn't very clear. My thought was maybe an apparatus could be constructed out of old refrigeration equipment in such a way that it could cool down alcohol to a temperature where these materials would turn brittle. Then you wouldn't need dry ice, just electricity. How this could be best done, I don't know.

 

[usaman65]

how about a cofee grinder

kev

 

[banjags]

silly question. but how would you grid a motherboard with a coffee grinder?

 

[usaman65]

no flat packs and small peices......not a whole motherboard!

 

[Anonymous]

Skippy, you could make a small refrigeration unit that could get to -40 or below with old refrigeration unit, it would need to be based on the right refrigerant maybe 404A or R 22, would have to do some checking to see
what would be best. I would not involve the alcohol you could simple plumb the cold side into a well insulated box with the opening on the top, that way your cold air will not fall out when you add/remove parts. you will not have to worry about cold alcohol dripping off of them, or leaking out of the container.

If you have the parts, and epa certification, I could help you design.

jim

 

[Buzz]

I obtained a large blender/liquidiser from freecycle and dropped in about a pound of the black plastic IC's from sound cards. I wrapped insulating tape around the clear plastic vessel in case it shattered.
When i switched it on it made enough noise to wake the dead!
It did a reasonable job of shattering the black plastc, enough to allow the acids to get in there anyway.
It didn't do much for the lightweight blades though.
I have a friend who is looking at making a much stronger set of blades for me.

 

[Ignatz61]

If your looking to soften fiberglass, we used to use acetone to clean brushes and soften the glass. If you soaked the fiber based ones in acetone for an hour or so it should desolve or soften depending on the resin used in manufacturing them.
JB

 

[Shaul]

I was thinking along the same lines, to use acetone to soften fiber processors; but then what do you do with it afterwards, put it into AP??

Just how much washing would be required to remove the acetone residue?, because according to the 'Wikipedia' acetone & peroxide forms a 'Primary High Explosive'.

Sounds like the perfect recipe for going out with a 'Bang'.


Shaul

 

[Ignatz61]

I will let someone else comment on the acetone / peroxide interaction. I don't have any real chemistry background. I just remember acetone will attack fiberglass and it evaoporates fairly quick. It is used in boat repairs for clean up.
jb

 

[Lou]

Evaporate the residual acetone off and you won't have any problems with acetone peroxide. Acetone peroxide (several forms exist actually) is indeed a dangerous explosive, so unstable that a small pile can in fact go off through the weight of crystals sitting in that pile.

So evaporate it off and you won't have to worry about it.

 

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