Slag Door Assembly With Independent Pivoting And Lifting
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Solution Overview
Problem
Existing slag door assemblies for metallurgical furnaces face challenges in providing reliable sealing and effective cleaning of the slag opening, often resulting in incomplete removal of slag residues and potential metal loss during the tapping process.
Innovation Solution
A slag door assembly that incorporates a pivoting movement about a horizontal axis and a linear movement perpendicular to it, allowing for controlled cleaning from inside the furnace to outside, enabling independent control of the cleaning distance and position to ensure thorough removal of slag residues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the slag door is moved from outside the furnace into the slag tunnel to clean the floor, then slag residues are pushed into the slag tunnel, but the cleaning effectiveness is insufficient and metal loss occurs
Solution Approach 1:
The patent inverts the traditional cleaning direction by moving the slag door from inside the furnace toward the outside, rather than from outside to inside. This reversal allows the slag door to scrape and push slag residues outward along the floor, improving cleaning effectiveness while controlling metal loss through the optimized movement path and sealing mechanism
Solution Approach 2:
The patent implements dynamic control of the slag door movement through multiple pivot axes (horizontal and vertical) and adjustable linear displacement. The system can adapt the cleaning path and pressure dynamically, optimizing the balance between effective slag removal and prevention of metal loss during the tapping process
2Manufacturing precision
If the slag door assembly uses a complex pivoting mechanism with multiple axes, then the cleaning position and distance are precisely controllable, but the device complexity increases
Solution Approach 1:
The slag door assembly is segmented into multiple independently controllable components with distinct pivot axes (horizontal pivot axis for angular adjustment, vertical pivot axis for position control). This segmentation allows precise control of the cleaning path while maintaining modular simplicity, where each axis performs a specific function rather than requiring a complex single mechanism
Solution Approach 2:
The multi-axis pivoting mechanism serves multiple functions: it controls the cleaning position, adjusts the cleaning distance, enables the scraping motion, and maintains sealing during movement. By consolidating these functions into an integrated pivoting system, the patent reduces overall device complexity compared to having separate mechanisms for each function
Data Source
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Figure 3a~3cB-B
AI summary
A slag door arrangement (10) for a metallurgical furnace (1) is disclosed, the furnace vessel (2) having a slag tunnel (8) with a rectangular opening cross-section provided laterally in the furnace vessel (2), wherein a pivoting movement of the slag door about the horizontal pivot axis and a lifting movement of the slag door in the direction perpendicular to the horizontal pivot axis are independent of each other, and a method for cleaning a slag opening of such a metallurgical furnace (1), wherein the slag door performs a cleaning movement from a position in the slag tunnel near the inside of the furnace towards the outside of the furnace out of the slag tunnel at controllably different distances from the bottom of the slag opening or the slag tunnel.