Mobile Gold Mill For Hard-Rock Ore: Crusher, Pulverizer, Shaker Table Fine Gold, Black Sand, Sulfide


Hi, my name is Jason Gaber with Mt. Baker Mining and Metals Today we are going to give you a little overview on what we do here and for more information you can go to our website what we do here is we specialize in crushing and concentrating hard rock ores we use gravity methods of concentration stay away from the chemicals and the permitting issues associated with those basically what we do is when a perspective client contacts Mt. Baker Mining and Metals we are going to ask for a test sample of your ore we like about a 100lbs of your ore sent to us and we will run that through our testing process on the equipment you see behind me, and we are going to test for the values in your ore and if those test prove positive we will look at coming onto your site taking our equipment onto your site and milling your ore on a production scale. and today we are going to do a little walk through and show you some of the equipment we use The first part of our process here is we will put it through a small jaw crusher like we have behind me here, this is a mark 6 rock hog and the opening on this jaw is 5 inches by 3 inches, so it will take about a 4 inch rock it’s run by a 16 horse gasoline motor and once it runs down through the jaw it comes out about half an inch out of the jaws it will fall directly into a roller mill located just below the jaw crusher the roller mill will further reduce he material to minus 8th of an inch the material falls out of this roller mill into this chute and the material falls down into the impact mill here is the inside of our impact mill as you can see it’s just an arm with paddles on each end and the arm rotates at about I think about 1,800 RPM it’s also driven by a 16 horse gasoline motor and it’s belt driven this impact mill will reduce the material to about minus 50 mesh and the material is gravity fed up and out of the impact mill down this tube and falls onto the shaker table the material falls out of this chute onto the shaker table the shaker table will carry the heavier material over to the left, the gold will be carried all hte way to the left and carried down these two holes here, they are the super concentrates holes the gold falls down into a bucket the heavier sulfides and tellerides, if there are any in your ore travel down here into the concentrates hole and fall down into the concentrates bucket here and any tailings will flow down the table this way down into the tailings trough here into a prototype hydrocyclone we have here and the goal of this is that the tailings will come down this tube here, tailings and water enter into the 6 inch diameter pipe here this is closed off so no water can flow out of the bucket and the water column travels up this 6 inch pipe and out here into the tailings pond this particular hydrocyclone will carry 80 mesh minus material up and out into the tailings the 80 mesh plus falls down into the water column and down into the bucket below where it can be re-ground in the impact mill and the water is re-circulated through this little pump here back up on the shaker table and a little bit is used on the jaw crusher Here is some ore from one of our clients and he sent us a little extra, so we are going to show you the process using his ore it’s gold bearing quartz out of a vein on his property and this ore runs about 0.5 and 0.6 ounces per ton and through our process if we crush it to about 90% 80 mesh we liberated about 85% of the gold and capture it on our shaker table here are the three buckets I wanted to show you after running them on hte table here are your super cons, about 95% of you gold should be in your super cons as you can see there is very very little material in there as well as concentration ratios go that’s well over a 100 to 1 the next bucket here is our concentrates bucket this where all our some silver sulfides may end up in there very little free gold will end up in the concentrates bucket but as you can see this material didn’t have very much sulfides in it I think overall our concentrates ratio are over 75 and a 100 to 1 and here is the material that was captured by the hydrocyclone this material is all 80 mesh plus as you can see in here is some larger grain maybe up to 20 mesh even but there shouldn’t be anything 80 mesh or smaller and all this material will get run through the system again to liberate any values that are locked up in some of these larger particles and the rest of the material that didn’t get captured in the hydrocyclone bucket went into the tailings pond you can see this material is very very fine 80 mesh minus This again is our super cons and our concentrate bucket and after the testing process is over we will take these two samples and send them off to a independent assayer and get them assayed for gold and silver we can also do led, zinc and copper anything your ore might have in it anything heavy will be concentrated into these two buckets and this will go off and this will be our cons assay the material that comes out of the hydrocyclone will be captured by a container held under this stream 1 second every 20 seconds and as this material is captured it will be placed into a sample bag and the tailings that are 80 mesh minus will be sent off for assayed over at an independent assayer so you will have a concentrates assay and a tailings assay and with those two numbers we can calculate a percent recovery this our super cons here and I just wanted to show you guys the finess of the gold were getting out of the shaker table normally this would be sent off for assay just to give you an idea what were capturing of the super cons hole I was going to pan this out for you you can see here the line of gold a crease in the pan there is my finger for scale the majority of this gold is minus 200 mesh and all this gold came out of only about 30lbs of ore this ore is running some where between, 0.5 and 0.6 ounces a ton and this would be an ore that is worth our while to mill this would make the this would make the land or mine owner money at half an ounce

8 thoughts on “Mobile Gold Mill For Hard-Rock Ore: Crusher, Pulverizer, Shaker Table Fine Gold, Black Sand, Sulfide

  1. I have 100 acres of land in British Columbia and have a large body of Quartz on this land. and will do some, testing this Spring. You are probably a long ways from where I am to come and work my Ground. However I really enjoyed your demonstration! Thanks

  2. just in case any of you are wondering, they don't make that unit that they're using here in this video anymore. they only make a one ton per hour unit and nothing smaller. I guess there's room for another manufacturer to do that. And the price has gone up because they added a spiral classifier.

  3. 85-90% is pretty good. In theory, could it be ground up even more in a ball mill, to say 100-300 mesh, and liberate 95-99%? Or would all the gold just float off the shaker table?

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