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Anyone use coal slag as blasting media?

Moparfiend

Moparfiend

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If so what are your thoughts on the stuff?

Effectiveness Longevity what type medium/fine/large etc. etc. etc.
 
is it really coal slag, or is it crushed coal? You can get the crushed coal at Tractor Supply. it works as a good blast media, but it is sharp as a razor when blasting. I have used it on some old cast iron painted pieces, but never on a car! better have a full suit on to use it as it will cut as it comes back on you.
PT in Tennessee
 
I use coal slag. It works ok, but I don't try to recycle it, so I can't really comment on it's efficiency. It's cheaper than blasting sand and won't give you silicosis. I run the fine stuff as anything bigger clogs up the blast nozzle.
 
Are you removing undercoating.
 
Are you removing undercoating
 
pturner said:
is it really coal slag, or is it crushed coal? You can get the crushed coal at Tractor Supply. it works as a good blast media, but it is sharp as a razor when blasting. I have used it on some old cast iron painted pieces, but never on a car! better have a full suit on to use it as it will cut as it comes back on you.
PT in Tennessee
Click to expand...
Its slag the byproduct. Thats what tractor supply sells Black Diamond.
 
bearman said:
Are you removing undercoating
Click to expand...
Paint rust undercoating what not. I just got a pressure washer adapter to do hydroblasting. Wanna try it out on my dash since that has so many bends etc that an abrasive wheel should be difficult.
 
I am by no means a professional and have used Black Diamond on cast iron, small parts etc and seems to work fine
Don't know if it would warp or distort body panels...
 
Why not use crushed glass as it cuts through paint n rust really well n under coating to.doing something the cheap way n maybe a second time cost about the same as doing it rite the first time
 
CHARGERSTEVEN said:
Why not use crushed glass as it cuts through paint n rust really well n under coating to.doing something the cheap way n maybe a second time cost about the same as doing it rite the first time
Click to expand...
Cheeper doesn’t always necessarily mean worse. Every media has different qualities. I have used sand and glass but slag is new to me and I wanted to hear from folks that have used it. Why do you think it’s inferior?
 
I find that slag breaks up easily n creates a fine dust when using it,and really is to fine to try n reuse it.It has the same character as glass and bouncing back at you n is sharp,i reuse the glass in my cabient blaster
 
I use Black Beauty slag (Ultra Fine grit) in my cabinet almost exclusively. It cuts rust, paint, oxidation and mill scale quickly, lasts much longer than the crap from Tractor Supply, and doesn't pulverize into dust immediately like other medias. It's a bit tougher to find but is worth the drive in my opinion; it's $16 per 100 pound bag.

Keep your pressure at 90 psi or less. Carbide tips outlast the ceramic ones by years versus a few days so they're worth the expense too.
 
I used it once at work, don't like it at all. We ran out of silica and grabbed some of it from TSC to finish the job, way slower and didn't leave nearly as nice of a finish.
 
Where does one buy non-TSC abrasives where they are readily available like TSC?

I'd like to try out other abrasives besides Black Diamond which for me seems to do good. (Probably since I haven't compared it to other products)

Many thanks
 
Thanks all, well I am going to try the medium slag grit I got this AM in this set up and will report my findings on a test piece or two soon.

0A476DCE-FC74-473B-978E-FB9CA4167390.png 04C26D7F-4B87-4B1E-AB74-2030BED6FF3E.jpeg
 
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