dshanpnw
has rocks in the head
Member since December 2020
Posts: 668
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Post by dshanpnw on Oct 29, 2023 12:49:41 GMT -5
This is a very interesting article from Lapidary Journal dated December 1967.
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adam5
having dreams about rocks
Member since August 2023
Posts: 61
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Post by adam5 on Oct 29, 2023 14:09:38 GMT -5
Thanks for sharing this!
This shows that slurry viscosity and grit surface area have a definite effect on grinding efficiency.
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dillonf
fully equipped rock polisher
Hounding and tumbling
Member since February 2022
Posts: 1,164
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Post by dillonf on Oct 29, 2023 15:05:03 GMT -5
It was fascinating to read the advertisements!
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dillonf
fully equipped rock polisher
Hounding and tumbling
Member since February 2022
Posts: 1,164
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Post by dillonf on Oct 29, 2023 15:06:15 GMT -5
I like this one best!  |
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chris1956
has rocks in the head
Member since July 2022
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Post by chris1956 on Oct 29, 2023 17:25:57 GMT -5
Thanks for sharing this.
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Post by liveoak on Oct 30, 2023 6:28:16 GMT -5
Thanks for sharing this- I printed it to read at the kitchen table 
Patty
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wyorock
off to a rocking start
Member since October 2023
Posts: 10
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Post by wyorock on Oct 30, 2023 8:03:05 GMT -5
Very informative and interesting. However there seems to be a disconnect between the 2nd to last page and the last page where we went from abrasive discussion to new mineral and hematite.
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Post by liveoak on Oct 30, 2023 20:13:07 GMT -5
Interesting article and it confirms what I've read with not using coarser than 80 in a 3 lb barrel.
I just wonder if anyone has done a similar test with a 12 lb barrel ?
Guess I have to search the archives.
Thanks for posting the article.
Patty
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velodromed
freely admits to licking rocks
What you do in your haste you will regret in your leisure.
Member since March 2023
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Post by velodromed on Oct 31, 2023 14:12:21 GMT -5
Thanks for posting! I love old articles like this.
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dshanpnw
has rocks in the head
Member since December 2020
Posts: 668
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Post by dshanpnw on Nov 1, 2023 7:26:27 GMT -5
Very informative and interesting. However there seems to be a disconnect between the 2nd to last page and the last page where we went from abrasive discussion to new mineral and hematite. Yes there was, sorry for carelessly posting pages. It has been fixed. Thank you so much. You're awesome. |
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dshanpnw
has rocks in the head
Member since December 2020
Posts: 668
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Post by dshanpnw on Nov 1, 2023 7:27:12 GMT -5
Thanks for posting! I love old articles like this. I replaced the mixed up page, thanks |
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dshanpnw
has rocks in the head
Member since December 2020
Posts: 668
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Post by dshanpnw on Nov 1, 2023 7:28:08 GMT -5
Interesting article and it confirms what I've read with not using coarser than 80 in a 3 lb barrel. I just wonder if anyone has done a similar test with a 12 lb barrel ? Guess I have to search the archives. Thanks for posting the article. Patty I put the proper last page where it belongs |
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dshanpnw
has rocks in the head
Member since December 2020
Posts: 668
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Post by dshanpnw on Nov 1, 2023 7:29:55 GMT -5
I fixed the error wyorock pointed out. The article should now make better sense. |
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wyorock
off to a rocking start
Member since October 2023
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Post by wyorock on Nov 1, 2023 7:55:50 GMT -5
Thanks so much. I'm going to print this and give it thoughtful consideration.
I was wondering if sometimes slurry has too much viscosity. It seems a point of "supersaturation" (of grit and rock "mud") is reached and no additional wearing occurs.
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