SI
SI
discoversearch

We've detected that you're using an ad content blocking browser plug-in or feature. Ads provide a critical source of revenue to the continued operation of Silicon Investor.  We ask that you disable ad blocking while on Silicon Investor in the best interests of our community.  If you are not using an ad blocker but are still receiving this message, make sure your browser's tracking protection is set to the 'standard' level.
Gold/Mining/Energy : A New Age In Gold Refining
 Public ReplyPrvt ReplyMark as Last ReadFilePrevious 10Next 10PreviousNext  
To: Michael J. Wendell who wrote (390)1/17/1998 5:33:00 PM
From: Bill Jackson  Read Replies (1) of 672
 
Michael, Comminution is fine grinding, communition is making guns together<GG>.
But you are right about ball mills vanishing before they make 1000 mesh stuff(out of their own balls)

I have seen some mills for brittle stuff that use kinetic impact of air entrained material. It will work on gold bearing quartz etc, but it sure costs a lot. It can be used on rubbery stuff with deep freezing. Common in the pharmaceutical and fine chemical industries, rare in our business.
The rotating plate mills are about the most cost effective really fine grind mills. The Balls and rods seem to top out in the 200-400 mesh area, it depends on the grinding index( a composite assessment of brittleness, fractureability, toughness, hardness etc that equivaltes to kilowatt hours per ton to a certain size. I could be more precise if you wish to get into it.

I will look for that thread and throw in some rubber granules.

I could not find the thread you started??

Bill
Report TOU ViolationShare This Post
 Public ReplyPrvt ReplyMark as Last ReadFilePrevious 10Next 10PreviousNext  

HomeMailHotSubjectMarksPeopleMarksKeepersSettings
Terms Of UseContact UsCopyright/IP PolicyPrivacy PolicyAbout UsFAQAdvertise on SI
© 2025 Knight Sac Media.  Data provided by Twelve Data, Alpha Vantage, and CityFALCON News