Electric Furnace Slag Door Stepped Seal Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Electric furnaces face challenges in preventing slag from leaking out during steelmaking, which affects heat efficiency and steel quality, and reduces the return rate of recyclable valuable metal oxides.
Innovation Solution
A slag discharge door apparatus with a door that overlaps with a stepped door support, featuring coolant passages to cool and solidify slag, minimizing gaps and preventing leakage, and a door operator to control the slag discharge outlet, along with guide rails and solidified slag detaching units to facilitate easy removal of solidified slag.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a simple door structure is used for slag discharge outlet, then device complexity is reduced, but slag leakage occurs affecting heat efficiency and steel quality
Solution Approach 1:
The door structure transitions from a simple planar configuration to a three-dimensional stepped configuration. The stepped portion protrudes from the door support surface, creating a multi-level structure that reduces gaps between the door and support in the vertical dimension, thereby preventing slag leakage without significantly increasing overall device complexity.
Solution Approach 2:
The door support structure is modified locally by adding a stepped portion at the critical interface area where the door contacts the support. This localized modification creates a more effective seal at the most vulnerable location (the gap between door and support) while leaving the rest of the door structure relatively simple, thus addressing slag leakage prevention without requiring complete redesign of the entire door system.
2Reliability
If the door is positioned lower to improve sealing, then slag leakage is reduced, but the door requires more support structure increasing device complexity
Solution Approach 1:
Instead of moving the entire door to a lower position (which would require more support structure), the solution adds a stepped portion in the vertical dimension at the door-support interface. This stepped structure effectively lowers the sealing surface locally without requiring extensive additional support, as the step itself serves as both the sealing surface and structural support element.
Solution Approach 2:
The stepped portion integrates multiple functions into a single structural element: it provides the sealing surface for the door, acts as a support for the door's lower end, and creates the necessary gap reduction. This merging of sealing and support functions reduces the need for separate support structures, thereby preventing slag leakage without significantly increasing device complexity.
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 inhibits slag leakage, enhances heat efficiency, improves steel quality, and increases the return rate of recyclable metal oxides, thereby improving cost effectiveness.
Implementation Method 1
coolant passages to cool and solidify slag
Data Source
AI summary
A slag discharge door apparatus for an electric furnace is disclosed. The apparatus includes a door which is operated by a door operator to open or close a slag discharge outlet of the electric furnace, and a door support which supports the door in such a way that a portion of a lower end of the door overlaps with the door support, so that slag is inhibited from leaking out of the electric furnace through the slag discharge outlet.