| abstract |
In the arsenic treatment contained in the non-ferrous smelting intermediate product, especially arsenic treatment in the form of arsenic trioxide, it meets the elution standard (according to the notice of Environment Agency notice 13) and has excellent filterability and stable scorodite with good reproducibility and complicated operation. It provides a simple way to create it. Water and alkali are added to the non-ferrous smelting intermediate product including arsenic trioxide to make a slurry, which is heated to leach arsenic, and the leachate is obtained by oxidizing trivalent arsenic to pentavalent arsenic to obtain a adjusting solution. An arsenic trioxide treatment method having a preparation step and a crystallization step of converting arsenic in the adjustment liquid into scorodite crystals. |