The EMLI Furnace Bath Level Measurement System
The EMLI Electric Arc Furnace Bath Level Measurement System precisely monitors steel bath levels, even during power-on phases. This advanced system enhances control and efficiency in furnace operations, achieving superior performance and safety.
EMLI System Overview
The EMLI™ (Electro Magnetic Level Indication) system employs advanced technology to measure and detect liquid metal levels accurately. The system’s core components include a MANAGEMENT UNIT, a CONTROL UNIT, and a PREAMPLIFIER UNIT. A single MANAGEMENT UNIT can oversee up to eight CONTROL UNITS in setups with multiple systems.
The MANAGEMENT UNIT is responsible for system monitoring, data logging, and setup, with remote access capabilities through an Internet connection if enabled.
The CONTROL UNIT is the system’s central component, generating the transmitter signal and processing the measurement data.
The PREAMPLIFIER UNIT amplifies the measurement signal before sending it to the CONTROL UNIT.
EMLI – FBL Furnace Bath Level Measurement System
The EMLI Furnace Bath Level Measurement System is a durable instrument that consistently and accurately gauges the liquid metal level in an Electric Arc Furnace (EAF). This system’s key advantage is its ability to take measurements both when the furnace is idle and during active arcing.
Typically, the system is designed to integrate with the existing furnace door manipulator. (If the plant lacks a manipulator, MPE-US can assist in acquiring one.) The manipulator requires a position encoder. A specially engineered proprietary EMLI sensor is installed at the end of a modified lance. Adding the EMLI sensor does not interfere with the lance’s other functions.
A crucial aspect of the EMLI Furnace Bath Level Measurement System is that it is unaffected by slag, ensuring accurate measurement of the liquid metal level in the furnace mold.
Principle of Operation
The EMLI Furnace Bath Level Measurement System features a specialized sensor that generates an electromagnetic field around the lance tip. When the lance is retracted, there is no metal near the sensor, resulting in minimal signal output. As the lance is inserted into the bath, it first encounters slag. The sensor, unaffected by slag, shows no change in signal output. However, as the sensor crosses the slag/steel boundary and enters the molten metal, the surrounding electromagnetic field is significantly altered, causing a sharp increase in the signal. The system then records the lance position at this moment, identifying it as the metal bath level.
Exceptional System Advantages
The EMLI Furnace Bath Level Measurement System precisely determines the actual metal level in the Electric Arc Furnace (EAF), offering these key advantages:
- It measures metal levels during both arcing and non-arcing phases of furnace operation.
- The system is mounted on the existing lance manipulator, remaining virtually invisible to the furnace operator.
- It does not interfere with other furnace measurements.
- Data from the system enables accurate calculation of the furnace’s hot heel.
- The system provides consistent, reliable measurements with durable equipment.
- A level measurement is obtained each time the lance is inserted into the bath.
- The system is designed with no consumable parts.
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