用樹脂吸附技術凈化和收酸--綜述

In the metal finishing industries solutions of strong mineral acids ( sulfuric, nitric, hydrochloric) are used to remove surface oxides that impair subsequent manufacturing operations. To a large degree these oxides are dissolved by the acids and as the concentration of dissolved metals increases there is a corresponding decrease in free acid concentrations. Although fresh acid can be added to the solution to make up for this, the
oxide removal ( pickling ) rate generally decreases when the metals concentration increases. The bath must be dumped when the oxide scale is no longer being adequately removed.
     在金屬精加工行業(yè)常用強無機酸（硫酸，硝酸，鹽酸）來去除表面的氧化物以減少對后續(xù)生產操作的影響。在很大程度上這些氧化物是被酸溶解的，并且隨著溶解的金屬濃度的增加游離酸的濃度也相應減少。雖然新的酸可被加入到溶液中以彌補這一點，但是當金屬濃度增加的時候，氧化物去除率（酸洗）通常會降低。當氧化皮不再被充分去除的時候，這些酸液就必須被倒掉。
This method of operation can cause productivity related problems. Freshly formulated pickling baths containing very low levels of dissolved ironare very aggressive and can cause over pickling. Material of substandard quality can also be produced as the bath approaches the spent condition.Rework may be necessary to prevent problems with subsequent surface treatment processes.
     這種操作方法會引起生產率有關的問題。含有溶解的鐵含量很低的新配制的酸洗浴是非常強勁的，并可能導致過度酸洗。由于酸洗而接近報廢的質量不合格的材料也可能會產生。返工可能是必要的，以防止出現(xiàn)后續(xù)的表面處理工藝問題。
In addition, spent pickle liquors can contain large amounts of unused or "free" acid. Free acid in a spent pickle bath represents a loss of valuablechemicals and a waste treatment liability. Continuous purification of pickle liquors can, therefore, offer several benefits to steelmakers:

- uniform product quality with reduced rework
- increased average pickling speed
- reduced chemical consumption
- reduced waste handling requirements
     此外，用廢了的酸洗液也包含了大量的未使用的或“游離”酸。用廢了的酸洗液中的游離酸代表了有價值的化學品和廢物處理的責任雙方面的的虧損。因此酸洗液的連續(xù)純化可以提供為鋼鐵生產商帶來如下優(yōu)勢：
- 降低返工率，統(tǒng)一產品質量
- 增加平均的酸洗速度
- 減少化學品消耗
- 減少廢物處理要求