How to conduct energy saving management for medium frequency electric furnace?

Power saving management on installation and selection of medium frequency electric furnace

1. The medium frequency electric furnace should use high-purity electrolytic copper as the raw material for coils and cables.
2. To increase the wire section of the induction coil and transmission line of the medium frequency electric furnace, a multi-wire parallel method can be used (with 3 to 5% power saving space).
3. Lower the temperature of the transmission line and coil of the medium frequency electric furnace. Every time the temperature increases by 25℃, the loss of the wire increases by 10%.
4. When conditions permit, try to increase the matching power of the medium frequency electric furnace and reduce the heating or smelting time.
5. When the medium frequency electric furnace is running, try to work at full load and avoid half-power operation.

Power saving management in the design and selection of medium frequency electric furnace

1. The compensation capacity of the medium frequency electric furnace should be designed according to actual needs, and try to ensure that the monthly average power factor is above 0.95. When necessary, suppliers are required to conduct field tests to improve the accuracy of the design plan.
2. Select single-phase filter reactor as far as possible for the reactor of the medium frequency electric furnace, which has low temperature rise and low loss.
3. The medium frequency electric furnace can be designed as a filter branch according to customer needs, such as 5, 7, 11, 13, Qualcomm, Type C, etc., and the harmonic requirements meet the requirements of the national standard.
4. For medium frequency electric furnace capacitors, “single-phase, explosion-proof” capacitors should be used as much as possible.
5. The medium frequency electric furnace is equipped with related protections such as overvoltage, overcurrent, overload, and overtemperature.
6. Use vacuum contactor for switching switch. The load of the medium frequency electric furnace is very stable, there is no need to choose the reactive power compensation of the thyristor switching, and the loss of the thyristor is very large. It is recommended to use a vacuum contactor as a control element, which has high reliability and low loss.

Power saving management in the production of medium frequency electric furnace

1. Install a separate electric meter for the special transformer for medium frequency electric furnace for the operator to record the daily electricity consumption. If the electricity consumption per ton of molten steel fluctuates abnormally, problems can be found and resolved at any time.
2. Clarify the peak and valley time of local electricity consumption, and arrange production reasonably.
3. Extend the continuous smelting time of the medium frequency electric furnace.
4. The medium frequency electric furnace does not require electricity for more than one month, and the transformer is reported to be shut down to save basic electricity costs.
5. The medium frequency electric furnace needs reasonable ingredients and production staff to prepare for feeding and shorten the feeding time.
6. Keep the medium frequency electric furnace equipment in good condition and have at least one professional electrician.