Long-term mold coating for direct copper casting
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Solution Overview
Problem
The energy-intensive process of electrolysis in copper production reduces the efficiency of copper extraction, as it requires significant energy for purifying copper to form semi-finished products.
Innovation Solution
Implementing a long-term coating on molds that allows for reduced contamination and enables immediate further processing of copper anodes without prior electrolysis, using a sulfur-free coating and applying sizing layers sequentially with controlled temperature and pressure to enhance the durability and fatigue strength of the coating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If electrolysis is used to form copper cathodes from copper anodes, then the purity of copper is improved, but energy consumption increases significantly
Solution Approach 1:
The mold is pre-coated with a long-term coating before casting copper anodes, which prevents contamination at the source. This preliminary protective action reduces the need for subsequent electrolysis purification, allowing direct processing of cast anodes into semi-finished products while maintaining acceptable purity levels and significantly reducing energy consumption.
Solution Approach 2:
The invention extracts or removes the electrolysis step from the traditional production chain for certain applications. By using long-term coatings that prevent contamination during casting, the process directly produces usable copper anodes without requiring the energy-intensive electrolysis extraction step, thereby eliminating unnecessary energy consumption while maintaining product quality.
2Shape
If traditional coatings are applied to molds, then the mold surface is smoothed, but the coating durability and operational reliability are insufficient
Solution Approach 1:
The invention uses a composite long-term coating composed of multiple layers including a base layer and a working layer with specific material compositions. This multi-layer composite structure provides both the required surface smoothness for good casting quality and exceptional durability, allowing the coating to withstand repeated casting cycles without significant degradation or contamination.
Solution Approach 2:
The invention changes the physical and chemical parameters of the coating materials and application process to achieve long-term durability. By controlling parameters such as coating thickness, material composition, and application temperature, the coating achieves both smooth surface finish and extended service life, maintaining its protective function throughout the entire operational cycle of the mold.
3Reliability
If sizing material is introduced into copper anodes during casting, then the mold surface is protected, but contamination of copper anodes occurs
Solution Approach 1:
The long-term coating acts as an intermediary barrier between the mold surface and the molten copper. This intermediate layer protects the mold surface during casting while being designed to prevent contamination of the copper anode with sizing material. The coating's specific composition and structure allow it to fulfill the protective function without introducing harmful contaminants into the copper product.
Solution Approach 2:
Instead of using traditional sizing materials that are applied and then contaminate the copper, the invention employs a durable long-term coating that serves repeatedly without needing frequent reapplication or replacement. This coating remains intact throughout the casting process, providing continuous protection without becoming a source of contamination, unlike disposable sizing materials that degrade and contaminate the metal.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach significantly reduces energy expenditure and contamination, allowing for efficient production of semi-finished copper products by bypassing energy-intensive electrolysis for certain workpieces and improving the quality and purity of the final product.
Implementation Method 1
at least one of the molds is applied with a long-term coating as a sizing
Implementation Method 2
A sulfur-free coating is applied to at least one of the molds
Implementation Method 3
copper cathodes are formed by electrolysis using at least one of the copper anodes
Data Source
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AI summary
To increase the efficiency of copper extraction, a process for producing semi-finished copper products is proposed. In this process, copper is first melted and cast into copper anodes in a single pour within several molds. Subsequently, copper cathodes are formed by electrolysis using at least one of the copper anodes, and these copper cathodes are then further processed into semi-finished copper products. These semi-finished products are characterized by the application of a long-term coating as a sizing to at least one of the molds, the application of a sulfur-free sizing to the mold, and/or the direct further processing of some of the workpieces cast in the molds into semi-finished copper products. The invention also provides a method and a device for applying a sizing to a mold and a system for producing semi-finished copper products.