What is EN ISO 27172:2011

EN ISO 27172:2011 is a technical standard that provides guidelines and specifications for Continuous casting of steel - Static measurement of liquid steel level by electromagnetic methods. This standard outlines the requirements and procedures for measuring the level of liquid steel in a continuous casting process using electromagnetic techniques. It aims to ensure accurate measurements, improve process control, and enhance the quality of final products.

Importance of Liquid Steel Level Measurement

The measurement of liquid steel level in a continuous casting process is crucial for several reasons. It helps monitor and maintain the proper filling of molds, ensuring consistent ingot dimensions and preventing defects like cracks or irregularities. Accurate measurements also enable efficient control of the casting speed, leading to improved productivity and reduced waste. Moreover, precise monitoring of the liquid steel level allows for timely adjustments in temperature and chemical composition to meet the desired product specifications.

Principles and Methods of Measurement

EN ISO 27172:2011 defines the principles and methods for static measurement of liquid steel level using electromagnetic techniques. The standard specifies the equipment requirements, installation procedures, calibration methods, and measurement accuracy criteria for electromagnetic meters. These meters utilize the interaction between electromagnetic fields and electrically conducting media (liquid steel) to determine the level of the molten metal accurately.

The measurement takes place through non-contact sensors that detect changes in the electrical properties of the liquid steel as the level varies. The sensors are typically positioned at predetermined heights along the casting process line and connected to a data acquisition system. By analyzing the acquired signals, the system calculates and displays the real-time liquid steel level, allowing operators to monitor and control the process efficiently.

Advantages and Limitations of Electromagnetic Measurement

Electromagnetic measurement of liquid steel level offers several advantages over traditional methods. Firstly, it provides continuous and real-time monitoring, enabling prompt interventions in case of deviations or anomalies. Secondly, electromagnetic meters are non-intrusive and do not require physical contact with the molten metal, improving safety for operators and avoiding disturbances to the casting process.

However, certain limitations should be considered when using these techniques. Electromagnetic measurements are affected by factors such as temperature variations, electric conductivity, and the presence of impurities or slag in the liquid steel. Calibration and periodic verification of the sensors and associated equipment are necessary to ensure accurate results and compensate for potential interferences.

In conclusion, EN ISO 27172:2011 sets the standards for measuring the liquid steel level in a continuous casting process using electromagnetic techniques. This standard provides guidelines for accuracy, calibration, and installation procedures to ensure reliable measurements and improved process control. By complying with this standard, steel manufacturers can enhance the quality of their products while optimizing productivity and reducing waste in the casting process.