Furnace Shell Weighing for Arc Furnace Scrap Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for controlling the continuous feeding of scrap metal into electric arc furnaces lack precision, leading to inefficiencies such as prolonged smelting times, electrode damage, and unreliable energy supply due to manual operation and imprecise weight measurement techniques.
Innovation Solution
An automatic device that measures and controls the feeding of scrap metal based on energy supplied to the bath, using a weighing system with support rollers equipped with sensors for precise weight readings, coupled with a data acquisition system to optimize load flow and prevent solid agglomerates, ensuring accurate and continuous feeding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual control by operator is used, then ease of operation is improved, but measurement precision and reliability deteriorate
Solution Approach 1:
The system uses automatic weighing devices and sensors to measure scrap metal weight and furnace shell weight changes, eliminating the need for manual measurement. The control system automatically processes this data to regulate feeding speed, making the system self-regulating without operator intervention for measurement tasks.
Solution Approach 2:
The patent replaces manual mechanical measurement and visual estimation with automated electronic weighing devices, sensors, and computer-controlled feeding systems. This substitution of mechanical/manual systems with automated electronic systems resolves the contradiction between ease of operation and measurement precision.
2Measurement precision
If direct weighing of furnace shell is used, then measurement precision is improved, but device complexity and stress resistance requirements worsen
Solution Approach 1:
The weighing system is segmented into multiple independent components: weighing devices mounted on support structures, separate sensors for weight measurement, and dedicated data processing units. This segmentation allows each component to be optimized independently while maintaining overall system precision without excessive complexity.
Solution Approach 2:
The patent introduces intermediary weighing devices and sensors that act as mediators between the furnace shell and the control system. These intermediaries collect and process weight data without requiring direct integration with the furnace structure, reducing the complexity of the overall system while maintaining measurement precision.
3Productivity
If continuous feeding control is implemented, then productivity is improved, but reliability and control precision worsen
Solution Approach 1:
The system continuously monitors scrap metal weight and furnace shell weight changes via sensors and weighing devices, feeding this real-time data back to the control system. The control system adjusts feeding speed based on this feedback, creating a closed-loop control system that maintains reliability while enabling continuous operation for improved productivity.
Solution Approach 2:
The feeding system dynamically adjusts operating parameters such as feeding speed and scrap metal flow rate based on real-time weight measurements and energy consumption data. This dynamic adaptation allows the system to maintain optimal performance and reliability during continuous operation, resolving the contradiction between productivity and reliability.
4Device complexity
If imprecise weight measurement is used, then device complexity is reduced, but manufacturing precision and process control deteriorate
Solution Approach 1:
The weighing devices and sensors serve multiple functions: measuring scrap metal weight, monitoring furnace shell weight changes, providing data for control decisions, and enabling both manual and automatic operation modes. This multi-functionality justifies the added device complexity by delivering multiple precision measurement capabilities through a single integrated system.
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 enables precise control of the scrap metal feeding, maintaining optimal energy usage, preventing electrode damage, and reducing human error, thereby enhancing productive efficiency and reducing the need for operator intervention.
Implementation Method 1
a device to weigh the furnace shell, its contents and any other components it may support
Data Source
Figure 1
Figure 2
Figure 3~5
AI summary
An equipment for the measurement and control of load material and scrap metal feeding into an electrical arc furnace, including an automatic control device for feeding control of load material or scrap according to the energy supplied to the bath, and a measuring device for the added load material, in correlation with the automatic control device, comprising a weighing device for the furnace shell, its contents and any other components it may support.