Process for preparing electrolytic copper foil in short range by utilizing copper oxide ore

Abstract

The invention provides a process for preparing electrolytic copper foil in a short range by utilizing copper oxide ore. The process comprises the following steps of: (1) soaking copper in sulfuric acid; (2) extracting copper; (3) deeply removing oil; (4) removing impurities from resin; (5) deacidifying a special membrane; (6) preparing electrolyte; and (7) preparing copper foil: preparing the copper foil by using the electrolyte to obtain raw foil and waste acid, deacidifying the waste acid through the membrane to obtain deacidified copper liquid and a low-acid solution, returning the deacidified copper liquid to the electrolyte for recycling, and returning the low-acid solution to the step (1). The process has the beneficial effects that the traditional process of preparing the copper foil by electrolytic copper, wire drawing, dissolving and electrodeposition is overturned, the process of smelting and electrodepositing copper by a wet method is eliminated, and the copper wire preparation process of electrolytic copper melting, ingot casting and wire drawing is eliminated; and the process technology applies a process of returning mother liquor to extract copper by fractional crystallization, and the problem that the copper-acid ratio cannot meet the production of the copper foil in the smelting process is solved.

Description

technical field [0001] The invention relates to the technical field of electrolytic copper foil, in particular to a short-range preparation process of electrolytic copper foil using copper oxide ore. Background technique [0002] Electrolytic copper foil is an important material for the manufacture of copper clad laminates (CCL), printed circuit boards (PCB), and lithium-ion batteries. In the rapid development of today's electronic information industry, electrolytic copper foil is called the "neural network" of electronic product signal and power transmission and communication. The production process of electrolytic copper foil is simple, and there are three main processes: solution raw foil, surface treatment and product cutting. Copper smelting methods can be divided into two categories: pyrometallurgy and hydrometallurgy. More than 85% of the world's refined copper production is recovered from copper sulfide concentrate and recycled copper by pyrometallurgy, and the ref...

AI Technical Summary

Problems solved by technology

The traditional electrolytic copper foil production process includes electrolytic copper, wire drawing, dissolution and then electrodeposited foil. Electrolytic copper needs to go through the copper wire preparation process of melting, ingot casting, and wire drawing. The production process is complicated and the process is long, which cannot meet the requirements of copper foil production. Acid ratio requirements

Sulfuric acid will gradually accumulate in the production of raw foil, and the direct discharge of this part of waste acid will cause environmental pollution. How to properly dispose of it is a difficult problem

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