Reuse of sulfuric acid waste acid from zinc smelters
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During zinc smelting, sulfide ores are roasted to produce sulfur dioxide; in the acid production process, the washing step generates some acidic waste. What methods are currently used to treat this waste, and can it be reused in the zinc production process?
Currently, it is rarely used in systems, as it contains impurity elements such as fluorine, chlorine, and arsenic, which can have an impact on the system. Generally, it is sent to a wastewater treatment plant where the impurities are solidified in sludge. The treated water is known as \"reused water\" and can be reused in the system.
If arsenic is present in the acidic waste, it can be recovered; there are also ways to handle other heavy metals and valuable metals as well. Common methods include the lime-iron salt method and the sulfidation method.
Reply to 3# yang*anghui: Arsenic recovery?
If the content is high, it can definitely be recycled
There is a membrane that can filter out metal ions, leaving behind the anions, but the acid still contains fluoride and chloride ions; there is concern that it may cause corrosion to stainless steel equipment when reused.
The points mentioned for the 2nd and 3rd floors are more or less the same. Our company possesses a complete set of technologies for treating acidic wastewater and reusing it. If you’re interested, you can add me on QQ: 99310839, and we can have a detailed discussion! ! Thank you! !
The removal of arsenic and fluorine under strong acid conditions has a significant impact on metal recovery; does anyone have any good solutions?