The cage-like structure in the bottom of the cone is continuously revolved and prevents clogging.At the same time, should the density of the material in the bottom of the cone become too great, thus indicating that the grinding operation is not producing a sufficiently fine product,<a href="http://www.sellercrusher.com/solutions/copper-concentrate-machine.html">copper concentrate machine</a> the float will rise and the feed will be momentarily cut off of the ball mill, until such time as the float again sinks. The same accumulation in the bottom of the cone will be removed and returned to the ball mill feed box.The density of the material overflowing from the classifier is controlled by means of the hydrometer 21 which, rising, closes the contacts 28, 29 and thus permits water to be introduced through the jets 23 around the periphery of the cone. This water is also accompanied by such solids as overflow over the adjustable weir 5 and are passed through the sump 18 and the pump 19 into the surge tank 20.
As a control of the volume of the material overflowing from the classifier into the inner launder, the float 30 is provided. If the volume at this point is too great, the shaker mechanism 31 will be stopped until such time as the amount and character of the ball mill discharge are proper. Lastly,<a href="http://www.sellercrusher.com/solutions/quarry-machinery.html">quarry machinery</a> the hydrometer placed within the splash ring in the classifier serves to automatically change the amount of water introduced into the mill and thus assures a proper amount of water in the ball mill overflow.
My apparatus is particularly desirable in that the classifier, even without the automatic controls, permits an amazingly uniform classifier product to be obtained.When the automatic controls are also utilized, the character of the product becomes still further improved.