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首页> 外文会议>T. T. Chen honorary symposium on hydrometallurgy, electrometallurgy and materials characterization >ACID SEPARATION FOR IMPURITY CONTROL AND ACID RECYCLE USING SHORT BED ION EXCHANGE
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ACID SEPARATION FOR IMPURITY CONTROL AND ACID RECYCLE USING SHORT BED ION EXCHANGE

机译：短床离子交换分离酸，控制杂质和回收酸

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摘要

Acid separation using short bed ion exchange is a now well established technology in copper refinery tankhouses. Refinery bleed streams from liberator cells are treated by short bed systems to produce an acid-free byproduct stream that contains the bleed metals and valuable nickel salts. Removing the acid eliminates the need for a black acid evaporator and reduces the amount of sodium carbonate required in nickel selective precipitation processes. The recovered sulfiiric acid can be recycled to the tankhouse. This same technology is routinely used to treat other acids such as hydrochloric, nitric, and hydrofluoric. In the case of hydrochloric acid, the process can selectively separate chloro-anionic complexes such as Zn, Pb, and Cu, which are then eluted with water. The acid recovery technology can also be closely coupled with ion exchange processes in order to minimize regenerant acid consumption. In many hydrometallurgical applications resin regeneration often requires an acid dosage multiple times the stoichiometric minimum. Coupling an acid recovery bed with the IX column allows recovery and recycle of the free acid in the spent regenerant, thus reducing the overall acid consumption to just slightly more than stoichiometric.
机译：使用短床离子交换进行酸分离是铜精炼厂的一种成熟技术。来自解放者池的精炼厂排放物流通过短床系统进行处理，以产生不含酸的副产物物流，其中包含排放金属和有价值的镍盐。除去酸消除了对黑色酸蒸发器的需要，并减少了镍选择性沉淀过程中所需的碳酸钠量。回收的亚硫酸可以循环到储罐中。该技术通常用于处理其他酸，例如盐酸，硝酸和氢氟酸。在盐酸的情况下，该方法可以选择性地分离氯阴离子复合物，例如Zn，Pb和Cu，然后用水洗脱。酸回收技术还可以与离子交换过程紧密结合，以最大程度地减少再生酸消耗。在许多湿法冶金应用中，树脂再生通常需要的酸剂量是化学计量最小值的几倍。将酸回收床与IX色谱柱耦合，可以回收和回收废再生剂中的游离酸，从而将总酸消耗降低到仅比化学计量略多。

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