Process Design on Comprehensive Treatment of Three Wastes during Tantalum-Niobium Hydrometallurgical Process AITranslate

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Chinese Library Classification Number:TF841.6[冶金工程—有色金属冶金]

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The sources,properties,and treatment measures of three wastes in the hydrometallurgical process of tantalum-niobium concentrate are comprehensively introduced.Among the three wastes,the waste water undergoes refined treatment,with the extraction raffinate containing radioactive substance or heavy metals being treated separately,achieving complete reuse through resource processing without any discharge.Other production wastewater is treated using lime for step-by-step defluorination and desulfation and negative pressure stripping deammoniation for ammonia recycling.The stripping deammoniation effluent is subjected to pH adjustment,flocculent deposition,and deep defluorination before being discharged to meet the standards.All exhaust gases are collected and sent to the purification system for discharge at high altitude after purification.The purification efficiency of pollution factors in process waste gas,dry waste gas and calcined waste gas exceeds 90%,and the boiler flue gas can be directly discharged by using low-nitrogen burners.Low-level radioactive solid waste and hazardous waste are temporarily stored in the radioactive residue storage and hazardous waste storage within the plant respectively,and are regularly entrusted to qualified units for disposal.General industrial solid waste is either comprehensively utilized or undergoes regular sanitary landfill with domestic waste.The process design not only realizes the standard discharge of three wastes but also promotes the efficient recovery and recycling of resources.