What Is An Submerged Arc Furnace

 

Submerged arc furnace is an industrial electric furnace with huge power consumption. Its mainly composed of furnace shell, furnace cover, furnace lining, short net, water cooling system, smoke exhaust system, dust removal system, electrode shell, electrode pressing and lifting system, loading and unloading system, gripper, burn-through device, hydraulic system, SAF transformer and various electrical equipment.

 

According to the structural characteristics and working characteristics of the submerged arc furnace, 70% of the system reactance of the SAF is generated by the short net system, and the short net is a system working with large current, and the maximum current can reach tens of thousands of amperes, so the performance of the short net determines the performance of the submerged arc furnace.

Its for this reason that the natural power factor of the ore-fired furnace is difficult to reach above 0.85. The natural power factor of most furnaces is between 0.7 and 0.8. The low power factor not only reduces the efficiency of the transformer and consumes a lot of useless work, but also imposes additional power fines on the power department.

At the same time, due to the manual control of the electrodes and the stacking process, the power imbalance between the three phases increases, and the maximum imbalance can reach more than 20%, which leads to low smelting efficiency and increased electricity bills. Therefore, improving the power factor of the short network and reducing the imbalance of the power grid have become effective means to reduce energy consumption and improve smelting efficiency.

If appropriate measures are taken to improve the power factor of the short network, the following effects can be achieved:
(1) Reduce power consumption by 5~20%;
(2) Increase output by more than 5%~10%

 

 

An ore-fired furnace is a device used for heating and smelting high-temperature ores. It is also called an arc furnace or a resistance furnace.
Submerged arc furnaces are mainly used for reducing and smelting raw materials such as ores, carbonaceous reducing agents and solvents. They mainly produce ferrosilicon, ferromanganese, ferrochrome, ferrotungsten, silicon-manganese alloys and other ferroalloys. They are important industrial raw materials and chemical raw materials such as calcium carbide in the metallurgical industry.
Its working characteristics are that carbonaceous or magnesium refractory materials are used as furnace linings and self-training electrodes are used. The electrodes are inserted into the charge for submerged arc operation, and the energy of the arc and the current passing through the charge due to the resistance of the charge is used to melt the metal. The charge is added successively, and the iron slag is discharged intermittently. It is an industrial electric furnace that operates continuously.
The load of the transformer of the submerged arc furnaces is continuous and stable, the impedance voltage is low, the voltage regulation level is large, the level difference is small, and the overload capacity is strong. It can be divided into two types: loaded and unexcited voltage regulation. Generally, the first few levels have constant capacity output, and the last few levels have constant current output.

 

The above is a brief introduction to submerged arc furnaces. SAF smelting furnace play a vital role in the production of various metals and alloys. By using electric current and strong heat, they are able to convert raw materials into valuable products. Our understanding of the inner workings of submerged arc furnace helps optimize manufacturing processes and ensure the production of high-quality metal alloys.

If you have any questions or have any needs regarding SAF, EAF, LF, IF, CCM, Melting furnace etc., please feel free to contact us at Sanrui Electric Furnace.