Mineral processing agents mainly refer to collectors, foaming agents, inhibitors, flocculants, modifiers, and extractants used in hydrometallurgy, matrix modifiers for extraction, diluents, etc., involving various types of inorganic or organic compounds Hundreds. Among them, there are 24 kinds of beneficiation agents (including arsenic, beryllium, cadmium, chromium, mercury, nickel, thallium, copper, lead and their compounds) that are included in China's black list of priority pollutants for water control (68 species). Agents include cyanide, hydrogen sulfide, phosphine, fluoride, arsenide, dichromate, copper sulfate, zinc sulfate, carbon disulfide, sulfurous acid, various alkyl xanthate, organic phosphorus, fatty alcohol, aniline, pyridine Hundreds of hydrocarbons, hydrocarbons, alkenes, ethers, ketones, aldehyde esters, etc.
Beneficiation includes three processes: washing, crushing and beneficiation. In the process of enriching valuable metals from ores with low content and multi-metal symbiosis and processing into concentrates with high metal content, various types of collectors, foaming agents, inhibitors, flocculations need to be added Agent. Most of them are toxic and hazardous substances, such as cyanide, arsenide, dichromate, various types of alkyl xanthate, substituted phenol, aniline, pyridine, hydrocarbon, alkene, ether, ketone, aldehyde ester, etc. The discharge of waste water enters the environment through tailings ponds, etc., and migrates and transforms in the water body, atmosphere, and soil, forming secondary pollution, causing serious pollution to the ecological environment.