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Coffee grinder EXPLOSION! :O

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  • Dimal
    replied
    Re: Coffee grinder EXPLOSION! :O

    Originally posted by 030F060605050C151314600 link=1284959444/20#20 date=1285326118
    Does this mean the click-clack lid is dangerous?
    Errrrr.... :

    Thatd be a No mate. The above really only refers to pressurised air being directed in a stream. The little puff that a Click-Clack Lid provides is unlikely to force coffee particles where they dont belong....

    Mal.

    Leave a comment:


  • coffeelust
    replied
    Re: Coffee grinder EXPLOSION! :O

    Originally posted by 4D60646865090 link=1284959444/19#19 date=1285310848
    GregWormald wrote on Yesterday at 11:03pm:

    If you want to clean a grinder then blowing is exactly the WRONG THINGto do.

    Stick the vacuum cleaner nozzle in the top (hopper) end and SUCK the debris out.

    Greg
    blowing sucks!
    Too right....

    Just asking for trouble of many different kinds. Explosive outcomes due to right mixture of suspended particles to air is but one. Some, such as motor winding failure, bearing failure, motor start/run capacitor short-circuit (across the terminals), etc etc... may not rear their ugly heads until an unknown day into the future.....

    The only air used for cleaning should be of the sucking variety, as Greg alludes to...

    Mal.
    Does this mean the click-clack lid is dangerous?

    Leave a comment:


  • Dimal
    replied
    Re: Coffee grinder EXPLOSION! :O

    Originally posted by 17223537073F223D313C34500 link=1284959444/18#18 date=1285246987
    If you want to clean a grinder then blowing is exactly the WRONG THING  to do.

    Stick the vacuum cleaner nozzle in the top (hopper) end and SUCK the debris out.

    Greg
    blowing sucks!
    Too right....

    Just asking for trouble of many different kinds. Explosive outcomes due to right mixture of suspended particles to air is but one. Some, such as motor winding failure, bearing failure, motor start/run capacitor short-circuit (across the terminals), etc etc... may not rear their ugly heads until an unknown day into the future.....

    The only air used for cleaning should be of the sucking variety, as Greg alludes to... 8-)

    Mal.

    Leave a comment:


  • GregWormald
    replied
    Re: Coffee grinder EXPLOSION! :O

    If you want to clean a grinder then blowing is exactly the WRONG THING to do.

    Stick the vacuum cleaner nozzle in the top (hopper) end and SUCK the debris out.

    Greg
    blowing sucks!

    Leave a comment:


  • Dennis
    replied
    Re: Coffee grinder EXPLOSION! :O

    Originally posted by 654A43415669454A45434149414A50240 link=1284959444/16#16 date=1285240736
    Compressed air usually has compressed air as the propellent ;D
    Gold! ;D

    Leave a comment:


  • A_M
    replied
    Re: Coffee grinder EXPLOSION! :O

    Originally posted by 6F697E756F6870721B0 link=1284959444/15#15 date=1285237608
    Its not the unodourised butane that is used as a propellent is it?

    I thought the air canisters were just nitrogen which wont go boom :-?  
    Compressed air usually has compressed air as the propellent  ;D

    It is the other products that are not so, that require more or a propellent to do what they need..... And in most cases usually stable or at least worth putting in a bag and breathing :

    Leave a comment:


  • trentski
    replied
    Re: Coffee grinder EXPLOSION! :O

    Its not the unodourised butane that is used as a propellent is it?

    I thought the air canisters were just nitrogen which wont go boom :-?

    Leave a comment:


  • Yelta
    replied
    Re: Coffee grinder EXPLOSION! :O

    Originally posted by 544E4A4849544C1F55270 link=1284959444/13#13 date=1285232525
    Dont even BOTHER with the can of pressurised air!
    Well, certainly looks like ya got the message.

    Leave a comment:


  • simonsk8r
    replied
    Re: Coffee grinder EXPLOSION! :O

    Okay, SO... lol I just had another explosive experience XD... Same thing happened! Ok, so the power was completely off, i sprayed into the hopper, all seemed well. I waited a bit, and turned on the grinder to grind up what was left in there, and a SPLIT second after I turned it on, BOOM! Same thing! Except the combustion occurred inside the grinder where the burrs are. Im really not sure how this occurred considering there was a fair gap between the spraying and the turning on of the grinder (any thoughts for a confused fellow human? ).

    I think the lesson here for me personally is... Dont even BOTHER with the can of pressurised air! Not worth it really, all it does is spread the grinds around the place anyways.
    Go on, laugh at me AM. I know you wanna/already are XD

    Leave a comment:


  • simonsk8r
    replied
    Re: Coffee grinder EXPLOSION! :O

    LOL it was pretty epic . Id do it again on purpose but I dont wanna hurt anyone/anything *cuddles grinder*

    Leave a comment:


  • jham66
    replied
    Re: Coffee grinder EXPLOSION! :O

    We did an experiment at school (back in the day) where you get an old milo/milk tin; punch a hole small enough to pass a length of air tubing (for aerating fish tanks) snugly through; put a small amount of flour in the bottom of the tin; put a lit tea light in the bottom; put the tin lid on and tap it to seal properly and, before the tea light goes out, blow in the air tubing.

    This results in the flour becoming air borne, rapid combustion of the particles and the tin lid blowing off.... usually to the ceiling!

    You did the same with pure O2!

    Leave a comment:


  • Yelta
    replied
    Re: Coffee grinder EXPLOSION! :O

    Originally posted by 4A505456574A52014B390 link=1284959444/0#0 date=1284959444
    BANG! A loud explosion noise and a big ball of flame to the right of the Rocky!
    Some people have all the fun.

    Leave a comment:


  • simonsk8r
    replied
    Re: Coffee grinder EXPLOSION! :O

    Ah yes yes i understand... haha

    So using the can of pressurised air was fine, but having the grinder switched on at the power point was a bad idea :O . Thanks AM

    P.S. Although i still have emotional resistance about going near the grinder with the can :S lol. Call it post-traumatic stress

    Leave a comment:


  • A_M
    replied
    Re: Coffee grinder EXPLOSION! :O

    Originally posted by 625E574F5A3B0 link=1284959444/7#7 date=1284973529
    Originally posted by 6A454C4E59664A454A4C4E464E455F2B0 link=1284959444/4#4 date=1284968030
    Many solids like wheat dust, wood dust and even metals in their dust form have high surface area. With a high surface area and surrounded by oxygen (as in the air), combustion can take place at a very rapid rate. This rapid rate of combustion can lead to an explosion. In fact, Dust explosions are hazards in many industries.
    Had a grain fire/explosion scare at the local silo the other day, even flour will go up given the right circumstances.
    http://www.plainsproducer.com.au/Public/Template2/ThreadView.aspx?tid=38966
    What only a 500M zone  

    BOT  

    What is one of the biggest fears for coal miners -  Coal dust and thus water and other methods are used to keep it under control.

    What is coal made from and then lets stretch it it and just say from a basic cellulose material - including carbon

    What are coffee beans and what do we do to them ROAST to a golden brown.  What are they in effect = A cellulose material including carbon

    Thus a fine powder of coffee (or a moist bit of chaff - including carbon - conductive) would be conductive and across A and Neutral @ 240V in the right concentration and an Ark could be generated, which would then move to a bigger bang with the right level of fuel and air.

    Lesson.  Turn things off when cleaning  8-)

    Leave a comment:


  • Yelta
    replied
    Re: Coffee grinder EXPLOSION! :O

    Originally posted by 6A454C4E59664A454A4C4E464E455F2B0 link=1284959444/4#4 date=1284968030
    Many solids like wheat dust, wood dust and even metals in their dust form have high surface area. With a high surface area and surrounded by oxygen (as in the air), combustion can take place at a very rapid rate. This rapid rate of combustion can lead to an explosion. In fact, Dust explosions are hazards in many industries.
    Had a grain fire/explosion scare at the local silo the other day, even flour will go up given the right circumstances.
    http://www.plainsproducer.com.au/Public/Template2/ThreadView.aspx?tid=38966

    Leave a comment:

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