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发明公开
CN104478140A 一种有色金属冶炼污酸净化处理方法 无效 - 驳回

一种有色金属冶炼污酸净化处理方法
摘要：
本发明涉及一种有色金属冶炼污酸净化处理方法，包括如下步骤：(1)在污酸中加入浓硫酸，调节酸度达到40～50g/L，加入白烟灰，在温度为70～80℃下浸出，然后加入氧化锌使pH达到2.5～3.0，搅拌反应并过滤；(2)将滤液分别通过氯离子交换树脂除氯，氟离子交换树脂除氟；(3)将离子交换后的液体分别经旋流电积除砷，旋流电积回收锌。本发明处理过的污酸达到零排放，且能够分离出其中的砷，回收其中的重金属锌，解决了传统污水处理产生石膏渣的堆存问题，达到铅锌铜联合冶炼企业污水、固废的零排放和综合回收与利用。
摘要（英）：

The invention relates to a non-ferrous smelting waste acid purification treatment method which comprises the following steps: (1) adding waste acid into concentrated sulfuric acid, adjusting the acidity to 40-50g/L, adding white ash, extracting at 70-80 DEG C, then, adding zinc oxide to enable the pH to 2.5-3.0, reacting under stirring and filtering; (2) removing chlorine from the filtrate by chloride ion exchange resin and removing fluorine from the filtrate by fluorine ion exchange resin respectively; and (3) respectively carrying out spiral electrodeposition on the liquid after ion exchange to remove arsenic and carrying out spiral electrodeposition to recover zinc. Waste acid treated reaches zero discharge, arsenic in the waste acid can be separated and heavy metal zinc can be recovered, so that the piling problem of waste gypsum residues generated in conventional sewage treatment is solved, thereby achieving zero discharge and comprehensive recovery and utilization of sewage and solid wastes of a lead, zinc and copper joint smelting enterprise.

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