Electrode Contact Clamp with Cooling Channels for Smelting Reactors
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Solution Overview
Problem
Existing electrode arrangements for electric smelting reactors, particularly those using consumable carbon electrodes, face challenges in maintaining a reliable seal when inserting electrodes through sidewalls or bottoms made of cooled metal panels or refractory materials, leading to potential leakage of aggressive liquid materials like slag during high-temperature carbothermic aluminum production.
Innovation Solution
The proposed solution involves a contact clamp with internal cooling channels and an electric isolation ring to create a sealing interface between the electrode and the reactor wall, combined with a steel ring for compressive force, ensuring a secure seal and allowing for electrode feeding without slag leakage. This arrangement includes a method where electrode feeding cylinders break the frozen slag layer by increasing temperature or pressure, ensuring continuous operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrodes are inserted through sidewalls or bottoms made of cooled metal panels or refractory materials, then current conduction to the electrode is achieved, but reliable sealing is difficult to maintain leading to potential leakage of liquid material
Solution Approach 1:
The patent implements a nested structure where the electric isolation ring is inserted into the opening of the shell, and the contact clamp with compressive means is positioned around the electrode and isolation ring. This nested arrangement creates multiple sealing interfaces: the isolation ring seals between the electrode and shell opening, while the contact clamp provides additional sealing pressure. The nested configuration allows current conduction through the electrode while maintaining reliable sealing against liquid material leakage.
Solution Approach 2:
The electric isolation ring serves as an intermediary element between the electrode and the shell opening. This ring made of electrically insulating material creates a sealing interface that prevents liquid material from penetrating through the electrode opening while allowing the electrode to pass through. The contact clamp with compressive means acts as another intermediary that applies pressure to maintain the sealing effectiveness of the isolation ring.
2Adaptability or versatility
If consumable electrodes are used, then electrode consumption is accommodated, but electrodes must be fed into the reactor interior requiring sealed openings that prevent liquid material escape
Solution Approach 1:
The patent implements a dynamic sealing system where the contact clamp with compressive means can accommodate the feeding motion of consumable electrodes. The compressive means applies continuous pressure on the electric isolation ring to maintain sealing integrity even as the electrode position changes during feeding operations. This dynamic compression ensures that the seal remains effective throughout the electrode feeding process, preventing liquid material escape while allowing electrode replacement.
3Duration of action of stationary object
If side wall contacts are radially moveable into the furnace, then wear on contacts is compensated, but device complexity increases and sealing challenges arise
Solution Approach 1:
The patent implements a self-adjusting sealing mechanism where the contact clamp with compressive means automatically maintains sealing pressure on the electric isolation ring. The compressive means is configured to apply continuous pressure that compensates for wear on the contact components. This self-service mechanism eliminates the need for complex radial movement systems while maintaining both contact service life and sealing integrity through automatic pressure compensation.
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
The solution effectively prevents liquid material leakage while allowing for safe and reliable electrode feeding, maintaining a protective frozen slag layer and ensuring operational integrity by providing a secure seal and controlled feeding mechanism.
Implementation Method 1
contact clamp being arranged about the electrode and having internal channels for circulation of a cooling medium
Implementation Method 2
maintaining a protective frozen slag layer
Data Source
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AI summary
Metallurgical reactors having cooling capability and electrode feed capability are disclosed. The reactors may include a shell having a sidewall and a bottom, where the shell is adapted to contain a molten material. The reactors may include at least one consumable electrode protruding through an opening of the shell and into the molten material. The reactors may include a current contact clamp configured to conduct operating current to the electrode, where the current clamp is in contact with the electrode, and where the current clamp comprises at least one internal channel, wherein the internal channel is configured to circulate a cooling medium. The reactors may include an electric isolation ring disposed between the electrode and the opening of the shell, wherein the electric isolation ring is configured to sealingly engage the electrode and the opening so as to restrict flow of the molten material out of the shell.