Immersion Device Position Detection for Electric Arc Furnace
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Solution Overview
Problem
Conventional temperature measurement methods in electric arc furnaces require lengthy intervals between measurements due to time-consuming position detection of optical cored wires, which are often far from the measurement site, leading to unreliable data and potential damage from debris and wear.
Innovation Solution
An immersion device with a blowing lance and detecting means that allows for real-time position detection of the optical cored wire close to the entry point, enabling faster movement and reducing the risk of debris accumulation, using inductive sensors or gas flow detection for precise position monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the optical cored wire position is detected in the feeding tube far from the vessel, then the position can be monitored, but the optical cored wire has to be moved a long way back and forth which is time-consuming and increases the interval between measurements
Solution Approach 1:
The patent moves the position detection from the feeding tube (remote location) to the blowing lance (close to the vessel entry point). This spatial relocation in another dimension reduces the movement path length, enabling faster positioning and shorter intervals between temperature measurements while maintaining detection accuracy.
Solution Approach 2:
The blowing lance serves as an intermediary structure that houses the position detection mechanism close to the vessel. By using the blowing lance as an intermediate platform, the system achieves both accurate position detection and reduced movement time, resolving the contradiction between measurement precision and time loss.
2Measurement precision
If the optical cored wire is moved frequently for position measurement, then the position can be determined, but debris or wear caused by the returning hot optical cored wire can pollute and damage or block the tubing
Solution Approach 1:
The patent extracts the position detection function from the feeding tube and relocates it to the blowing lance. This separation allows the optical cored wire to be detected at a location close to the vessel without requiring long movements through the feeding tube, thereby reducing debris pollution and wear in the tubing while maintaining measurement precision.
Solution Approach 2:
The blowing lance is designed as a replaceable component that can be easily discarded or replaced if damaged. This approach allows the system to tolerate some wear and debris accumulation, as the blowing lance can be quickly replaced without disrupting the entire measurement system, thereby reducing the impact of harmful factors.
3Measurement precision
If the leading end of the optical cored wire is detected far from the vessel, then the position can be monitored, but the distance of the leading end to the melt cannot be kept significantly lower
Solution Approach 1:
The patent relocates the position detection mechanism to the blowing lance, which is positioned close to the vessel entry point. This spatial reconfiguration in another dimension enables the leading end of the optical cored wire to be detected at a much shorter distance from the melt, reducing the movement path and improving measurement efficiency while maintaining detection accuracy.
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
This solution reduces the interval between temperature measurements, enhances data reliability, and minimizes wear by limiting the optical cored wire's movement path, allowing for more frequent and accurate process control in electric arc furnaces.
Implementation Method 1
using inductive sensors or gas flow detection for precise position monitoring
Implementation Method 2
a blowing lance for blowing purge gas into an entry point to the vessel
Data Source
AI summary
The invention relates to an immersion device and a method for detecting a position of an optical cored wire using an immersion device. An immersion device for measuring a temperature of a metal melt inside an electric arc furnace vessel with an optical cored wire comprises a blowing lance for blowing purge gas into an entry point to the vessel and a detecting means for detecting a position of the optical cored wire. The optical cored wire can be moved in a feeding channel and/or in the blowing lance relative to the entry point. The detecting means is configured to detect the presence of the optical cored wire in or close to the blowing lance. This enables short distances between the leading end of the fiber and the melt and, thus, short time intervals between temperature measurement sequences.