双向平行流铜电解生产实践

从电解液温度、电解液中铜和酸的浓度、阳极泥沉降、结垢清洗等方面对顶侧双向平行流和底侧双向平行流铜电解槽生产情况及条件进行比较。结果表明，顶侧双向平行流有利于阳极泥沉降，可降低阴极铜含银，阳极泥清洗时间短；底侧双向平行流电解液流动更为简单，循环条件好，但不利于阳极泥沉降、不便于清洗。高银阳极宜采用顶侧双向平行流，利于提高银回收率；低砷高锑高杂阳极，阳极中摩尔比As/(Sb+Bi)<2,阳极泥沉降差，宜采用顶侧双向平行流，提高阳极泥沉降；高电流密度(大于400 A/m²),阳极中摩尔比As/(Sb+Bi)>2,阳极泥沉降好，宜采用底侧双向平行流，循环条件更好。

Plant Production of Copper Electrolysis with Two-Way Parallel Flow

The copper electrolysis production of top side two-way parallel flow and bottom side two-way parallel flow was compared from the aspects of electrolyte temperature, concentration of copper and acid in electrolyte, anode slime sedimentation, scaling cleaning and so on. The results show that two-way parallel flow on top side is beneficial to settling of anode mud, silver content in cathode copper can be reduced, and the cleaning time of anode mud is short; while flow of electrolyte in two-way parallel flow on bottom side is simple, circulation condition is good, and it is not conducive to anode mud sedimentation and washing. The two-way parallel flow electrolysis on top side is suitable for anode with high silver content, which is beneficial to improve recovery of silver. For the anode with low arsenic, high antimony and high impurity, the mole ratio of As/(Sb+Bi) in anode is less than 2, and the settlement of anode mud is poor, so it is suitable to adopt two-way parallel flow electrolysis at top side to improve settlement of anode slime. When the current density is higher (greater than 400 A/m2), the molar ratio of As/(Sb+Bi) in anode is more than 2, the anode mud sedimentation is good, and the bottom side two-way parallel flow should be adopted for better circulation conditions.