Re: Sand or Crushed Walnut Shells for Blasting?

Posted by Al English on March 03, 2001 at 17:36:12 from (24.30.29.47):

In Reply to: Sand or Crushed Walnut Shells for Blasting? posted by Bill Scharf on March 03, 2001 at 16:58:10:

Hi Bill, Walnut shells are more agressive than you might think. You're right, they are easier on things than sand, but critical surfaces should still be masked or protected. Blasting with walnut shells can lead to warped and/or wavy sheet just as sand can do. I used them in a blasting cabinet with a reclaim unit. They hold up pretty well. I stopped using them because they were slower and less effective than aluminum oxide, and saved no time otherwise. That was over ten years ago, and I don't remember the costs anymore, but I think it worked out close to the more expensive but longer lasting aluminum oxide grit. If you're not reclaiming I would use either sand or slag(sometimes called black beauty). Even then we sweep up, screen, and re-use much of the media when doing open air blasting. One last thing. In case you didn't already know this, it's very important not to breath the dust and grit generated by blasting. Hope I answered your question. Al English

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