| 摘要 |
PURPOSE: A method for recovering zinc oxide from steel dust produced from a steelmaking process is provided to maximize the reaction amount and speed by increasing the specific surface of steel dust, thereby obtaining zinc sulfate leachate with high recovery rate and high purity. CONSTITUTION: A method for recovering zinc oxide from steel dust produced from a steelmaking process comprises the steps of: pulverizing washed dust in a wet-type ball mill for 15-20 hours into ultrafine particles having an average particle size of 5-8 micron meters; adding 2.7N sulfuric acid solution to the ultrafine particles, performing zinc leaching reaction for 30-60 minutes, and finishing the leaching reaction at a range of pH5-5.5 to obtain zinc sulfate solution; adding sodium carbonate into the zinc sulfate solution to obtain zinc carbonate precipitate; filtering the zinc carbonate precipitate to obtain zinc carbonate; and clacinating the zinc carbonate at high temperatures to separate zinc oxide.
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