Ultrasonic Separation Of Fine Gold And Black Sand
Apr 16, 2011 ultrasonic separation of fine gold and black sand. 16 April, 2011 - 0508 Traveller. Hello I am new to this site and would like some suggestions on an idea I am working on. I live in northern British Columbia, Canada, and my hobby is placer mining for gold. At todays gold prices, however, it is starting to be more than a hobby.