cikker
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Posts posted by cikker
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hoi,
first,this is all new to me this online conversation so sorry if it looks a little hectic. i am 61 years old and not so web minded. second i am from the netherlands so my english is sometimes not correct. third, at work i have a good exhaust system by my oven. with the proper filters. i know about the toxic zinc fumes melting brass. i cannot ask my supervisors how to do my work , i am the "expert" .i don't work at an office but on a metal yunk yard. other rules and priorities.
The point by melting brass for me is too keep all the metal in the melt including the zinc. this i need to analyze the cooled melt. my employer wants to know the percentages of different metal in the sample. this determines the price for buying and selling.
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thanks for worrying but not neccesarry.most of the time i melt cupper. i became pretty good in that i think. melting brass is just my own experiment. Except a collega in germany who's on the same level as me i think we are the company's expert's.
as flux i use borax when the samples are very contaminated whit dirt,dust or plastic. all the metal in the sample i need in the melt in order to get a good analyze of the percetages.
and i am from holland
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i work at a non ferro scrap yard an d a year ago they still sampled the percentage of copper in shredded cable copper by looking at it .and second the brass i used were used bullet casings.my company is a global player in ferro but have no idea what i am doing with non ferro. attached my result after melting up to 1500 degrees celsius
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hi everyone,
I am new here and have a problem. At work they gave me a 15 kw induction oven to melt metal samples. Nobody at work had knowledge about it so i had to find out for my self.
At the moment i manage too melt copper and aluminum. Brass however i did not. It wont melt totally or the zinc is cooking and is glowing like the sun. Is it possible the dirt in the melt prevents it. I tried it fast and slow (3kw and 15kw) and from 850 degrees to 1600 degrees. The best result is a half molten substance. i hope someone can help.
bvd.
brass melting
in Smelting, Melting, Foundry, and Casting
Posted
thank's for the link to the chemistry article. i know now that with an induction oven you can't make a proper melt to analyze brass. this to the loss off zinc. Because the most we get is brass twist it probably has to be done chemicly. I got an old niton xray scanner but this won't work properly with twist. I even got a spectrograph on probation . this is very accurat , better than x-ray , but only works with melts which surface is polished.
I tell my supervisor about the brass and stick to copper and aluminium.