Plasma Etching Pretreatment Casing for Metal Oxide Removal
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Solution Overview
Problem
Metal materials in industrial settings form surface oxides quickly due to high temperature and humidity, leading to difficulties in feeding high-purity metals to melting furnaces as the oxides float on the surface, making it hard to predict metallurgical compositions and manage the material effectively.
Innovation Solution
An apparatus and method involving a housing with a material dropping chamber and a plasma etching chamber, where a pretreatment casing reciprocates and rotates to perform plasma etching on the metal material, removing the surface oxide layer before feeding it into the melting furnace, maintaining a vacuum atmosphere and using a reactive gas to prevent re-oxidation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If metal material is stored under industrial conditions (high temperature and humidity), then the metal material is readily available for processing, but surface oxidation occurs rapidly forming oxide layers that contaminate the material
Solution Approach 1:
The patent applies preliminary action by performing plasma treatment and vacuum sealing on metal materials before they are stored or transported. The plasma generation unit creates a controlled plasma environment that removes surface oxides in advance, and the vacuum sealing unit immediately seals the treated material in a vacuum state, preventing re-oxidation before the material enters the storage or processing环节
Solution Approach 2:
The patent uses vacuum sealing to create an inert environment around the metal material. The vacuum sealing unit removes air and seals the material in a vacuum container, creating an oxygen-free inert atmosphere that prevents surface oxidation during storage and transport, allowing materials to be kept ready for processing without oxidation contamination
2Object-generated harmful factors
If pickling and water washing are performed to remove oxide layers, then the oxide layers are removed from the surface, but highly reactive metals form fine oxide layers again immediately after exposure to atmosphere
Solution Approach 1:
The patent replaces the mechanical/chemical pickling and water washing process with a plasma-based removal system. The plasma generation unit uses plasma energy to remove oxide layers through a controlled plasma reaction, which is more effective and cleaner than traditional mechanical or chemical methods, and the treated material is immediately sealed in vacuum to prevent re-oxidation
Solution Approach 2:
The patent ensures continuity of useful action by immediately sealing the plasma-treated material in a vacuum state without exposing it to atmosphere. The vacuum sealing unit operates continuously to maintain the protective vacuum environment, ensuring that the oxide removal effect is sustained throughout storage and transport without interruption or re-oxidation
3Ease of operation
If metal material is fed to melting furnace with oxide layers present, then the feeding process is simple, but oxides float on molten metal surface preventing evaporation and making it difficult to predict metallurgical compositions
Solution Approach 1:
The patent applies preliminary action by removing oxide layers from metal materials before feeding them to the melting furnace. The plasma generation unit treats the material to remove surface oxides, and the vacuum sealing unit maintains this clean state during transport, ensuring that only high-purity material enters the furnace without requiring complex feeding procedures
4Object-generated harmful factors
If wet treatment is performed on metal material, then oxide layers are removed, but the material requires additional drying and handling steps increasing process complexity
Solution Approach 1:
The patent replaces the wet treatment process with plasma treatment. The plasma generation unit removes oxide layers through plasma reaction without using liquids, eliminating the need for subsequent drying steps. The entire process from oxide removal to vacuum sealing is completed in a continuous dry process, significantly reducing process complexity and equipment requirements
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
Enables continuous feeding of high-purity metal materials to the melting furnace, reducing temperature fluctuations and preventing additional oxide layer formation, thus ensuring consistent metallurgical compositions and improved material management.
Implementation Method 1
a material etching chamber for performing a plasma etching process
Implementation Method 2
maintaining a vacuum atmosphere and using a reactive gas to prevent re-oxidation
Data Source
AI summary
A material feeding apparatus is disclosed. An apparatus for removing a surface oxide of a metal material and feeding the metal material to a melting furnace, according to an embodiment of the present disclosure, includes: a housing including a material dropping chamber for feeding and discharging the metal material and a material etching chamber for performing a plasma etching process; and a pretreatment casing configured to reciprocate between the material dropping chamber and the material etching chamber in the housing, wherein the pretreatment casing receives the metal material from the material dropping chamber to store the metal material, moves to the material etching chamber to plasma-etch a surface oxide layer of the stored metal material, and then returns to the material dropping chamber to drop the etched metal material into the melting furnace.