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申请号:201911234407.X 公开号:CN111118303A 主分类号:C22B19/34
摘要:【中文】本发明公开了一种氧压浸出锌冶炼固废渣制备次氧化锌的方法,将氧压浸出锌冶炼固废渣干燥至含水15%以下,再将固废渣利用造粒机造粒。然后与石灰石、石英石及还原煤混合后送往富氧侧吹炉。将物料融化,熔炼时向炉内鼓入富氧空气,完成造硫、造渣等化学反应。渣中的硫生成SO2,通过烟气管道进入制酸系统生产工业硫酸;熔融的炉渣采用烟化炉吹炼,烟尘产出次氧化锌产品,烟化炉渣无害化处理。本发明解决了锌氧压浸出过程中产出的冶炼固废堆存、运输困难、浸出渣中有价金属无法回收等问题,实现了锌氧压浸出冶炼固废无害化处理。具有可回收铅、锌、铟、锗、银等有价金属、能制备工业级次氧化锌产品、工艺流程简单且有价金属回收率高、能耗低等优点。 【EN】The invention discloses a method for preparing zinc hypoxide by using oxygen pressure leaching zinc smelting solid waste slag, which comprises the steps of drying the oxygen pressure leaching zinc smelting solid waste slag to the water content of below 15%, and granulating the solid waste slag by using a granulator. Then the mixture is mixed with limestone, quartz stone and reducing coal and then sent to an oxygen-enriched side-blown converter. Melting the materials, blowing oxygen-enriched air into the furnace during melting to complete chemical reactions such as sulfur making, slag making and the like. Sulfur in the slag forming SO2The industrial sulfuric acid is produced by entering an acid making system through a flue gas pipeline; the melted slag is blown by a fuming furnace, the smoke produces a secondary zinc oxide product, and the fuming furnace slag is subjected to harmless treatment. The invention solves the problems of difficult stockpiling and transportation of the smelting solid waste produced in the zinc oxygen pressure leaching process, incapability of recycling valuable metals in leaching slag and the like, and realizes the harmless treatment of the zinc oxygen pressure leaching smelting solid waste. Can recover valuable metals such as lead, zinc, indium, germanium, silver and the like, can prepare industrial grade zinc oxide products, and has the technological processSimple and high recovery rate of valuable metal, low energy consumption and the like.
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