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Does anyone have a magnet SOP that I can take a look at?


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calaggal

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Posted 28 August 2014 - 07:09 PM

Hey yall,

 

Does anyone have a magnet SOP that I can take a look at? I am in the process of writing one and am a lil stuck



RMAV

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Posted 29 August 2014 - 01:38 PM

1. Inspection:

-is the magnet damaged or worn so as to compromise its effectiveness?

       -manufacturer information

 

2. Cleaning of magnet:

-remove gross soils

-remove "fines"

-report to QA, supervisor, etc. if find metal larger than X mm

-clean and sanitize using approved detergent and sanitizer

 

3. Operation

-check magnet at X frequency including beginning and end of production run/shift

-report to QA, supervisor, etc. if find metal larger than X mm

         -segregate affected product since last good check

 

Appendix: Magnet documentation

-user manual/documentation

      -manufacturer's recommended use

      -manufacturer's recommended cleaning procedures

      -manufacturer's certificate of conformity or guarantee of performance (what is it supposed to do?)

              -tolerances, limitations of performance

      -recommended condition/replacement considerations and does it have a useful lifespan?

 

Others may have other ideas or things I didn't think of.



fgjuadi

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Posted 29 August 2014 - 02:24 PM

The above looks pretty complete - we used to weigh the fines as a way to gauge metal to metal contact, which in retrospect sounds like we were aware of metal to metal and let it continue, but our hoppers were pretty rusted, so that generated some of the fines.   

 

You may also want to add something about how to move or handle to magnet if it is large -

I don't have a copy of the magnet cleaning SOP from my last gig, but we had a safety section -

The magnets would be attracted to hand rails etc & smash employee fingers on more than one occasion.  Sometimes they'd get stuck on other equipment & we'd have to call maintenance, who probably thought we were fools. 


.--. .- -. - ... / --- .--. - .. --- -. .- .-..

Dr Vu

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Posted 22 October 2014 - 11:48 AM

magnet pull strength SOP


A vu in time , saves nine

Dr Vu

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Posted 22 October 2014 - 11:50 AM

 will send you the other one on inspection  soon as I go thru my files

 

Attached File  magnet pull strength.Dr Vu.docx   405.47KB   190 downloads[


Edited by Dr Vu, 22 October 2014 - 11:54 AM.

A vu in time , saves nine

Thanked by 2 Members:

Charles.C

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Posted 22 October 2014 - 01:35 PM

Does anyone have a magnet SOP that I can take a look at? I am in the process of writing one and am a lil stuck

 

 

Good one, albeit probably accidental. :smile: 

 

Rgds / Charles.C


Kind Regards,

 

Charles.C


Jero285

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Posted 15 June 2018 - 06:13 PM

Hi everyone

This is my first post/ question in this forum. So be gentle with your replies

 

I hope that this topic is monitored and I will receive some help from you guys. I went through some magnet posts and this one seems most fitting.

 

Here is my question. We have rare earth magnets in our dry flake processing line prior packaging. We have some that we remove completely from the line and the operator brings the whole magnet "assembly" in the lab. In the lab we pull them apart and we weigh, analyze (size off findings) the metal in 99.9% it is just a little bit of silver metal dust. But we have Rare earth magnets that are permanently connected to the line and we cannot remove them. We have a tray below these magnets, we pull the magnet apart and collect the metal findings and the some of the dry flakes of the production. this tray is brought to the lab. We weigh metal dust and the flakes, analyze (size off findings) and record the total weight and metal size.

We were ask by a customer why we weigh the combined sample flakes and metal dust and I couldn't answer. I don't like this sentence but we have always been doing it this way. Should we use a different rare earth magnet and separate flakes and metal and only record the metal or keep doing it this way. Tried to search on Google how to properly clean and record findings on rare earth magnets but was not successful.

 

Thank you for your help



012117

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Posted 24 July 2018 - 08:51 AM

Hi, Jero285.

 

What is your criterion first for magnet collection (when do you react)? Is your criteria involving the recovered weight or is your criteria based on the size of the metal recovered in the magnet? From my experience , all the powder are being removed first from the magnet using suitable brushes. If you have the proper strength magnet, then, adhering metal should still be intact with your magnet during this activity. Once loose powder is removed, all adhering magnet can easily be removed from the housing if you use the easy clean type (wherein the housing is removable). From the magnet which don't have removable housing, adhering particles is scraped off from the surface and collected in white paper. All the collection is collected in separate circular magnet. The criteria we have before is weight (from the baseline) and size of collected particles.






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