Abstract:Through the production practice of the liquid ammonia separation silver-hydrazine hydrate immersion silver process, the problems and causes of the ammonia dispersion and discharge were found and the treatment methods were analyzed: the liquid ammonia station was cancelled, the ammonia water was used instead of the liquid ammonia, and the ammonia leaching silver separation was selected. Hydrazine hydrate silver immersion process is sealed production in the whole process, it is necessary to build a new ammonia water preparation system, sealed silver separation reactor and immersion silver reactor, add a filter, washing and drying integrated machine, dilute acid instead of water to absorb ammonia absorption Tower transformation. After the optimization and transformation, and supporting equipment are put into operation, the problem of ammonia gas dispersion can be effectively solved, and the transformation cost can be recovered in about three years.