白银是电影、电视、照像、电子、化工工业和国防工业的主要原材料之一.世界各工业发达的国家,白银消费量都大于生产量,我国也是如此.感光材料工业的耗银量占总耗银量的四分之一.因此,除矿产银外,为了扩大白银的来源,还从各种废料中广泛回收白银.近年来,一些国家纷纷发表有关回收白银的研究文章和专刊.例如美国伊斯曼 Silver is one of the main raw materials in the fields of film, television, camera, electronics, chemical industry and national defense industry.While in all the developed countries in the world, the consumption of silver is greater than the production volume, as is our country. Therefore, in addition to mining silver, in order to expand the source of silver, but also extensive recovery of silver from various waste.In recent years, some countries have published research articles and monographs on the recovery of silver, such as the United States Eastman