Water-Cooled Burner Panel Design for EAF Uniform Melting
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Solution Overview
Problem
In electric arc furnaces, the asymmetrical heat distribution from the arc leads to cold spots, causing uneven melting and increased wear on furnace walls, and existing burner panel designs are prone to failure due to flashback, blowback, and jet reflection issues, which are not adequately addressed by current shielding methods.
Innovation Solution
A water-cooled burner panel with an elongated design extending from the furnace wall, featuring shaped grooves that channel slag to form an insulating layer, reducing exposure to harsh conditions and minimizing the distance to the molten metal, thereby enhancing operational efficiency and service life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If burners are positioned farther from the furnace wall to avoid overheating hot spots, then uniformity of scrap melting is improved, but the distance to molten metal increases reducing heating efficiency
Solution Approach 1:
The burner system is divided into multiple independent burner units distributed across the furnace wall, with each burner independently positioned and controlled. This segmentation allows different burners to target different zones (cold spots vs hot spots) with optimized positioning, resolving the contradiction between needing distance for uniformity and proximity for efficiency
Solution Approach 2:
Different burners are positioned at different distances from the furnace interior based on local requirements. Burners targeting cold spots are positioned farther away, while burners in other zones may be positioned closer. Each burner's positioning is optimized for its specific function, allowing simultaneous achievement of uniform melting and efficient heating
2Use of energy by moving object
If burners are positioned closer to the molten metal to improve heating efficiency, then energy distribution is improved, but exposure to harsh conditions increases causing burner panel failure
Solution Approach 1:
Burner panels are equipped with water cooling systems and protective shielding before being exposed to harsh conditions. The water cooling channels are pre-installed in the burner panel structure, and protective measures are built into the design from the beginning, cushioning the panels against thermal stress and flashback damage before failure can occur
Solution Approach 2:
A water cooling system acts as an intermediary between the burner panel and the harsh furnace environment. The cooling water absorbs excess heat and protects the burner panel structure from direct thermal damage, allowing the burners to operate closer to the molten metal while maintaining panel reliability
3Reliability
If burner panels are shielded to protect against flashback and blowback, then reliability is improved, but distance to molten metal increases reducing operational efficiency
Solution Approach 1:
The water cooling system serves as an intermediary protective layer between the burner and harmful conditions. Instead of using physical shields that increase distance, the cooling water provides protection through thermal management, allowing the burner to maintain close positioning while achieving reliability through active cooling rather than passive shielding
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 decreases the distance to the molten metal, reduces burner panel failures, and increases operational efficiency and service life by using the slag as insulation and improving energy distribution within the furnace.
Implementation Method 1
A water-cooled burner panel with an elongated design extending from the furnace wall
Implementation Method 2
featuring shaped grooves that channel slag to form an insulating layer, reducing exposure to harsh conditions
Implementation Method 3
burners utilizing hydrocarbon fuel such as, for example, natural gas or oil, at least one movable oxygen lance for injection of a stream of oxygen toward the molten bath for refining purposes
Data Source
AI summary
The present invention generally relates to apparatuses and methods for use in metal melting, refining and/or other processing, such as, for example, steel making in an electric arc furnace (EAF), and more particularly, to improved burner panels and related methods for the introduction of various energy sources, such as, for example, chemical energy and particulates.