Electrolytic copper foil production In the process, the treatment of solid waste is very important, which directly affects the effect of environmental protection and resource utilization. Solid waste mainly includes copper slag generated by electrolysis and waste slag generated by auxiliary agent added during electrolysis. This article will discuss from two aspects of copper slag and waste slag Electrolytic copper foil Treatment method of solid waste in production.

First, the treatment of waste copper slag. In the production process of electrolytic copper foil, the waste copper slag produced contains a certain proportion of valuable copper elements, so the treatment of waste copper slag can realize the reuse of resources by recovering copper elements. The recovery methods of waste copper slag include mine beneficiation, recovery smelting, technical transformation and other ways.

Mine beneficiation is to treat waste copper slag as ore and separate the part with high copper content for recovery. In the beneficiation process, flotation, gravity separation, magnetic separation and other methods can be used to separate copper ores, so as to achieve the purpose of recovering copper elements. The advantage of beneficiation recovery is that copper ores with high purity can be obtained, but the cost is high and the mine resources are limited.

Recovery smelting is to smelt the waste copper slag to extract pure copper or copper alloy. This method is mainly to separate the copper element from the waste copper slag through high-temperature smelting and chemical reduction reaction. The advantage of recovery smelting is that it can recover copper with high purity, and can be reasonably mixed with raw materials to reduce production costs. However, the smelting process will produce a large amount of sulfur dioxide and waste slag, which will pollute the environment to a certain extent.

The technical transformation is to reduce the production of waste copper slag by improving the electrolysis process and increasing the output rate. For example, the generation of copper slag can be reduced by adjusting the electrolyte composition, changing the current density, etc. The advantage of this method is that it does not require additional investment and environmental pressure, but requires long-term technical research and practical verification.

Secondly, disposal of waste residue. Auxiliary agents added in the production process of electrolytic copper foil, such as sulfuric acid, copper sulfate, etc., will produce a certain proportion of waste residue after a round of electrolysis, which contains a small amount of copper elements, sulfate and other substances. The disposal of waste residue can be realized by the following ways.

The first is the recycling of waste residue. The waste residue contains a small amount of valuable elements, such as copper, which can be recycled to achieve resource reuse. The waste residue can be recycled by extracting copper or using the waste residue as building materials.

Second, comprehensive utilization of waste residue. The waste residue contains organic substances such as sulfate, which can be used for farmland as fertilizer and soil conditioner, and can also be used as raw materials for reprocessing. The method of comprehensive utilization of waste residue can be industrialized, and waste residue can be used as raw material for secondary processing and utilization.

Third, the harmless treatment of waste residue. For the waste residue that cannot be recycled and comprehensively utilized, it needs to be treated innocuously. For example, high temperature incineration, chemical treatment and other methods can be used to decompose and transform harmful substances in waste residue to achieve the goal of harmless treatment.

To sum up, solid waste treatment in the production of electrolytic copper foil is a complex and important link. For the treatment of waste copper slag, resources can be reused through mine beneficiation, recovery and smelting, technical transformation and other ways; For the treatment of waste residue, the reduction and recycling of waste residue can be realized through recycling, comprehensive utilization and harmless treatment.