Electronic Scrap Processing Method for Copper Smelting
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Solution Overview
Problem
The increased processing of electronic and electrical device component scrap in copper smelting flash furnaces leads to over-reduction issues due to high carbon content from organic substances, and introduces excessive smelting inhibitors, limiting the amount of scrap that can be processed effectively.
Innovation Solution
A method involving sorting processes to minimize smelting inhibitors, including steps to remove powdery materials, film-shaped scrap, and wire scrap, followed by concentration of synthetic resins and substrates, and finally, concentrating substrates with valuable metals using a sorter equipped with a metal sensor, color camera, air valve, and conveyor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the amount of electronic and electrical device component scrap processed in the copper smelting flash furnace is increased, then the productivity of metal recovery is improved, but the carbon component from organic substances increases causing over-reduction troubles
Solution Approach 1:
The patent applies preliminary action by performing incineration of the scrap before processing it in the copper smelting flash furnace. This pre-treatment removes organic substances and reduces carbon content, preventing over-reduction troubles while enabling increased scrap processing volume. The incineration step is conducted beforehand to prepare the scrap for subsequent smelting operations.
2Productivity
If the amount of electronic and electrical device component scrap processed is increased, then the productivity of metal recovery is improved, but the amount of smelting inhibitors introduced increases limiting further processing
Solution Approach 1:
The patent converts the harmful effect of smelting inhibitors into a benefit by using them as fuel material in the incineration step. Organic substances and other smelting inhibitors that would normally interfere with the smelting process are burned beforehand to generate heat, which is then utilized in the copper smelting flash furnace. This approach eliminates the harmful effects while maintaining energy efficiency.
3Productivity
If electronic and electrical device component scrap is crushed before processing to reduce volume, then the productivity of processing is improved, but the amount of unwanted substances introduced increases
Solution Approach 1:
The patent applies preliminary action by performing incineration before crushing the scrap. By removing organic substances and reducing the material to ash through combustion first, then crushing the remaining inorganic materials, the process minimizes the introduction of unwanted substances while maintaining processing efficiency. The sequence of operations is reversed compared to conventional methods.
Data Source
AI summary
Provided is a method for processing electronic and electrical device component scrap, which can increase an amount of electronic and electrical device component scrap processed in a smelting step and efficiently recover valuable metals. The method for processing electronic and electrical device component scrap includes: a step 1 of removing powdery materials and film-shaped component scrap from the electronic and electrical device component scrap; a step 2 of concentrating synthetic resins and substrates from the electronic and electrical device component scrap from which the powdery materials and film-shaped component scrap have been removed; and a step 3 of concentrating the substrates containing valuable metals from a concentrate obtained in the step 2.