Abstract:Aiming at the problem that some of flotation agents have a great impact on the environment, this paper establishes the life cycle emission evaluation model of the copper and molybdenum separation inhibitors NaHS and BK511, and compares the life cycle emission evaluation indexes of NaHS with the indexes of BK511 by using life cycle evaluation technology for the first time. The results showed that: compared with NaHS, applying one-pot synthetic technology, the preparation and production process of BK511 does not produce any pollution. Less waste discharged during the flotation process with lower toxicity and less reagent dosage indicates BK511 has comprehensively better external life cycle footprint. BK511 is proved to be a clean and high-efficiency copper-molybdenum separation inhibitors and an excellent substitute for NaHS in terms of product inhibition performance and life cycle emission.