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An Electrochemical Procedure for Copper Removal from Regenerated Pickling Solutions of Steel Plants

机译：钢铁厂再生酸洗解决方案的铜矿的电化学程序

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Pickling is the treatment of metal surfaces by removing oxide layer, rust, scale, inorganic contaminants or other impurities from ferrous metals, copper or precious metals. A strong inorganic acid such as hydrochloric acid is used for plain carbon or low alloy steel pickling. When the concentration of copper in the pickling solution exceeds about 100 mg/L, reversion may take place and randomly plating of copper onto the steel strips which causes visual incompatibility occur. Furthermore, efficiency of pickling decreases with the increase of copper content. The reversion may be delayed to higher Cu concentrations by adding fresh acid to the line. Increased acid consumption only delays the time to discard the solution but increases the cost and hazardous nature effect on the environment. An experimental electrochemical procedure has been conducted to remove copper from pickling solution to reduce the concentration below 100 mg/L. Within this scope, effects of applied current density, copper concentration and electrolysis duration on copper deposition were studied. Current density was determined as the most effective parameter to remove copper from the regenerated pickling solutions of steel plants.
机译：酸洗是通过从黑色金属，铜或贵金属中除去氧化层，锈，鳞片，无机污染物或其他杂质来处理金属表面。诸如盐酸的强无机酸用于普通碳或低合金钢酸洗。当酸洗溶液中的铜浓度超过约100mg / L时，可以将铜随机镀升到钢带上，这会导致视觉不相容。此外，随着铜含量的增加，酸洗的效率降低。通过向线添加新鲜酸来延迟回变至更高的Cu浓度。酸消耗量增加仅延迟丢弃解决方案的时间，但增加了对环境的成本和危险性的影响。已经进行了实验电化学程序以从酸洗溶液中除去铜，以降低100mg / L以下的浓度。在此范围内，研究了施加电流密度，铜浓度和电解持续时间对铜沉积的影响。电流密度被确定为最有效的参数，以从钢铁厂的再生酸洗溶液中除去铜。

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