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Sluice box classifying screen

jimmy bedrock		Posted : Sunday, 28 September 2014 1:51:36 PM(UTC)
Rank: Gold Ingot Groups: Registered Joined: 14/01/2013(UTC) Posts: 339 Thanks: 242 times Was thanked: 179 time(s) in 104 post(s)		I just made a classifying screen for my sluice box. I know its not ideal and ill probably lose some gold but I should be able to process more dirt to make up for it. The idea has been around for a long time but I have added a damper made from miners moss. I am hoping the moss will help clean and tumble the rocks as they go through. What do you think? jimmy bedrock attached the following image(s):

Sluicebox		Posted : Monday, 29 September 2014 4:29:17 PM(UTC)
Rank: Gold Flake Groups: Registered Joined: 3/09/2013(UTC) Posts: 14 Location: Auckland Thanks: 4 times Was thanked: 4 time(s) in 4 post(s)		Looks good, I tried something similar with my A52, but used 9.5mm 40% perforated sheet. Tried it in the arrow river last summer and was good. Problem with the arrow is so much black sand. File Attachment(s): Sluice.jpg

c4bb0ose		Posted : Monday, 29 September 2014 4:40:46 PM(UTC)
Rank: Gold Nugget Groups: Registered Joined: 7/09/2014(UTC) Posts: 97 Thanks: 1 times Was thanked: 32 time(s) in 29 post(s)		Originally Posted by: Sluicebox Looks good, I tried something similar with my A52, but used 9.5mm 40% perforated sheet. Tried it in the arrow river last summer and was good. Problem with the arrow is so much black sand. How magnetic (if at all) is the black sand? I reckon you could set up some rare earth magnet sand traps if they are magnetic.

Sluicebox		Posted : Monday, 29 September 2014 6:35:01 PM(UTC)
Rank: Gold Flake Groups: Registered Joined: 3/09/2013(UTC) Posts: 14 Location: Auckland Thanks: 4 times Was thanked: 4 time(s) in 4 post(s)		The arrow black sand is highly magnetic. Not to sure if a magnet trap may make the situation worse as it will also trap fine gold and form large clusters of sand. Might be worth a bit of trial and error thou.The fine gold and black sand go together. Biggest tip is get some bushmans mozzie spray, they are relentless barstards.

kaka		Posted : Wednesday, 1 October 2014 8:26:44 AM(UTC)
Rank: Gold Flake Groups: Registered Joined: 6/10/2011(UTC) Posts: 17 Location: New Zealand Thanks: 7 times		Good ideas-but wouldn't one shovel full of gravel fill the screen and then need washing and removal? Possibly putting the classifier at an angle would cause the gravel to slide off sideways but then it would be unwashed.

jimmy bedrock		Posted : Wednesday, 1 October 2014 3:04:55 PM(UTC)
Rank: Gold Ingot Groups: Registered Joined: 14/01/2013(UTC) Posts: 339 Thanks: 242 times Was thanked: 179 time(s) in 104 post(s)		Originally Posted by: kaka Good ideas-but wouldn't one shovel full of gravel fill the screen and then need washing and removal? Possibly putting the classifier at an angle would cause the gravel to slide off sideways but then it would be unwashed. This is the one I copied. https://www.youtube.com/watch?v=NqeLWnSDV-4 Im just being lazy and don't wanna classify

kiwijw		Posted : Wednesday, 1 October 2014 7:34:27 PM(UTC)
Rank: Gold Ingot Groups: Registered Joined: 28/03/2010(UTC) Posts: 1,152 Thanks: 92 times Was thanked: 658 time(s) in 324 post(s)		Jimmy Bedrock, Lazy people dont generaly find much gold. It comes down to effort & reward. :) Saturday afternoons effort on my behalf for 2.5 hours detecting. A lucky horse shoe find helped me find the unlucky number of 13 little nuggys Good luck out there JW :) Edited by user Wednesday, 1 October 2014 7:35:54 PM(UTC) \| Reason: Not specified

jimmy bedrock		Posted : Wednesday, 1 October 2014 8:28:47 PM(UTC)
Rank: Gold Ingot Groups: Registered Joined: 14/01/2013(UTC) Posts: 339 Thanks: 242 times Was thanked: 179 time(s) in 104 post(s)		That's some nice gold and sweet horse shoe.. hopefully I can find my first bit of detecting gold on my next trip. I made the screen just because I have very limited time down south and want to do as much sluicing as I can...when im not detecting or sniping If the screens no good I will get the buckets and classifier out.

gjj109		Posted : Sunday, 12 October 2014 10:38:32 PM(UTC)
Rank: Gold Ingot Medals: Groups: Registered Joined: 14/03/2011(UTC) Posts: 464 Location: Thames Thanks: 217 times Was thanked: 194 time(s) in 115 post(s)		If you dump your unclassified material at the front of the sluice, the large rocks will build up behind the bar holding your blue material in place. If you classify your material, you will require a lower water flow to move the material through your sluice hence finer gold will settle out more readily. Also, unless you are fortunate, most of the time you will need to bucket the material to your sluice. If you classify the material into a bucket, you will not have to carry as many rubbish rocks to your sluice. I don't see how your attachment will work successfully, but give it a go, just be prepared to be adaptable.