Recycling. Recycling of Precious Metals.

Brief historical and commercial information precedes a statement of the sources of ‘secondary precious metals’ materials and a discussion of the pyrometallurgical and chemical treatment circuits. Examples are given of the evaluation methods of materials being treated and pre-sampling methods of treatment and plant used are outlined. Descriptions are given of the work done by Mochikoshi factory, Chugai mine Co., at their refineries with regard to pyrometallurgical treatment, the electro-refinery and chemical treatment, reference being made to new ideas and modifications under investigation at the present time.