Application of Energy Storage Waste Heat Recovery Technology in Tantalum/Niobium Hydrometallurgy 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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In the process of tantalum niobium hydrometallurgy producing tantalum/niobium oxides,the washing of tantalum/niobium hydroxides generates a large amount of alkaline wastewater with high ammonia nitrogen content,which is treated with stripping deammoniation columns by most smelting plants currently.The qualified treated wastewater generally has a temperature higher than 70℃.And a great deal of high-temperature waste flue gas is generated with the calcination of tantalum/niobium hydroxides.The energy storage waste heat recovery technology introduced in this paper utilizes a plate heat exchanger to recover waste heat from the wastewater and a flue gas heat exchanger to recover waste heat from the waste flue gas.The combination of these two heat exchange methods in tantalum/niobium hydrometallurgy could recover waste heat and generate hot pure water above 70℃,effectively saving energy.