Broken Evo III Electrode for High Temperature Roll (Separator)

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Maheva Camille RATSITOARISOA Active Contributor Join Date: Jun 2020 Posts: 17	Broken Evo III Electrode for High Temperature Roll (Separator) 10/30/2020 2:24 AM
	Hi guys, My company is a mining industry. We recently install these electrodes on High Temperature Roll (HTR)Separator. 3 of them are broken until now. After investigation, the root cause of this failure is still unknown. Maybe some of you know? Thanks and regards
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SolarEagle Guru Join Date: Mar 2007 Location: by the beach in Florida Posts: 33392 Good Answers: 1817	#1 Re: broken Evo III electrode for High Temperature Roll (Separator) 10/30/2020 3:42 AM
	Seems to me you are using the wrong type of electrode, or a defective part....but it's hard to see what's in the pictures without any explanation... __________________ All living things seek to control their own destiny....this is the purpose of life
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SolarEagle Guru Join Date: Mar 2007 Location: by the beach in Florida Posts: 33392 Good Answers: 1817	#2 In reply to #1 Re: broken Evo III electrode for High Temperature Roll (Separator) 10/30/2020 4:04 AM
	__________________ All living things seek to control their own destiny....this is the purpose of life
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PWSlack Guru Join Date: Jan 2007 Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on. Posts: 32175 Good Answers: 839	#3 Re: broken Evo III electrode for High Temperature Roll (Separator) 10/30/2020 4:17 AM
	The Welder who carried out the one in the RH picture needs more practice. __________________ "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
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SolarEagle Guru Join Date: Mar 2007 Location: by the beach in Florida Posts: 33392 Good Answers: 1817	#5 In reply to #3 Re: broken Evo III electrode for High Temperature Roll (Separator) 11/01/2020 4:37 PM
	That looks like it could be a picture of the failed element split open....Looks like electrolysis run wild, or electrostatic discharge grounding...so I would check the grounding connections and/or the sacrificial anode that might exist...or it could just be as I said above, a faulty or improper element...If this electrode was changed out it might have different voltage/amperage requirements than the original...so a mismatch between the two is possible.... __________________ All living things seek to control their own destiny....this is the purpose of life
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rwilliams Guru Join Date: Jul 2016 Posts: 1368 Good Answers: 105	#4 Re: Broken Evo III Electrode for High Temperature Roll (Separator) 10/31/2020 11:10 AM
	The second picture looks like the result of mechanically restrained thermal expansion, but hard to imagine how that piece fits into either photo or Solar Eagle’s diagram. As PWSlack observes, weld quality may be key to performance in a high temperature high frequency magnetic environment, i.e. no carbon precipitation allowed.
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