从胶片生产的含银废料中回收白银的新工艺

Improvement in the Technology for Recovering Silver from Silver Wastes during Photographic Film Production

我国感光材料工业是白银消耗的大户,其耗用量约占全国白银总量的40％,而其生产过程产生的废料却含有生产投入银量的约10％,若不进行回收,不仅浪费资源,而且严重污染环境。天津感光材料公司开发用于生产的回收工艺可使银回收率达到98.5％,得到纯度99.5％的金属银。

Our photographic materials industry consumes a big amount of silver equalled to ca. 40% of the total conssumption of silver in our sountry. Its production wastes contain silver amounting to about 10% of the total quantity of silver enclosed in the raw materials used. If not recovered, this silver can seriously pollute the environment and consequently become a formidable waste of state resources. A recovery process explored and put into production by TJPMC can hit a silver recovery rate of 98. 5 % , yielding 99. 5% pure metallic silver.