I.Characteristics
1. High Temperature Resistance * The short network in metallurgical industrial electric furnaces generates extremely high
temperatures during operation. The short network insulating materials can withstand high-temperature environments. Their high-temperature resistance is mainly manifested in that they can be exposed to temperatures of several hundred degrees Celsius or even higher for a long time without rapid aging, decomposition or loss of insulating properties. For example,some insulating materials with ceramic fiber components have a temperature resistance limit of more than 1000°C and can effectively adapt to the high-temperature working conditions of metallurgical electric furnace short networks.
* These materials also maintain good thermal stability at high temperatures, and have a relatively low coefficient of thermal expansion. This means that when the temperature changes, they will not crack or be damaged due to excessive expansion or contraction, thus ensuring the continuity and reliability of insulation.
2. High Insulation Strength
* The current in the metallurgical electric furnace short network is usually very large. Therefore,the insulating material must have high insulation strength to prevent current leakage. Its insulation resistance is extremely high and can withstand voltages of thousands of volts or even higher without being broken down. For example, mica tape and other insulating materials have a dielectric strength of 10 - 50kV/mm, which enables it to effectively isolate current in a high-voltage environment and ensure the safe operation of the short network system.
* They also have a low dielectric loss. Under the action of an alternating electric field, the power loss is small, which helps to improve the energy utilization efficiency of the electric furnace and reduce the heat generated due to the loss of the insulating material itself.
3. Good Mechanical Properties
* The short network insulating materials need to have sufficient mechanical strength to withstand the stress during installation and the external forces such as vibration and impact that may be received during operation. For example, some epoxy resin laminated products have relatively high tensile strength and flexural strength. The tensile strength can reach 30 - 100MPa, and the flexural strength can reach 50 - 150MPa.
* These materials also have a certain degree of toughness and will not break easily. They can maintain integrity in a complex mechanical environment, thus ensuring the durability of the insulation effect.
4. Chemical Stability
* There may be various chemical substances in the metallurgical industrial environment, such as metal oxides and corrosive gases. The short network insulating materials have good tolerance to these chemical substances and can resist chemical corrosion. For example, polymer insulating products can resist the erosion of acids and bases to a certain extent and maintain stable performance in the pH range of 3 - 11.
* They can also resist the adhesion and erosion of pollutants such as dust and oil generated during the metallurgical process, ensuring that the insulating performance is not affected.
5. Arc Resistance * Arc phenomena may occur during the operation of the metallurgical electric furnace short network. The insulating materials have good arc resistance and can withstand the impact of the arc without being damaged. For example, some insulating materials with special formulations can quickly form a protective film under the action of the arc to prevent further erosion of the arc,thus protecting the safety of the short network system.
II.Advantages
1. Safety Guarantee
* The characteristics such as high insulation strength and arc resistance effectively prevent the occurrence of electrical accidents such as short circuits and leakage, ensuring the personal safety of operators and the normal operation of metallurgical electric furnace equipment. In the high-energy and high-risk environment of the metallurgical industry, reliable insulating materials are one of the key factors for safe production.
2. High Efficiency and Energy Saving
* The characteristic of low dielectric loss helps to reduce the power loss in the insulating
material and improve the energy utilization efficiency of the electric furnace. For a large energy consumer like the metallurgical industry, this can reduce production costs and improve economic benefits. At the same time, good thermal stability also helps to maintain the normal working temperature of the electric furnace short network and reduce the energy waste caused by abnormal temperatures.
3. Strong Durability
* High temperature resistance, good mechanical properties and chemical stability make the insulating materials have a long service life. This means that during the long-term operation of the metallurgical electric furnace, there is no need to frequently replace the insulating materials, reducing the maintenance cost and downtime of the equipment and improving production efficiency.
4. Wide Adaptability
* These insulating materials can adapt to different types of metallurgical electric furnaces. Whether it is an arc furnace, an induction furnace or other special electric furnaces, appropriate insulating materials can be selected according to their specific working conditions and requirements. Moreover, they can also cooperate well with different metal materials and other components to ensure the optimization of the overall performance of the short network system