Электродуговая печь VS Рудно-термическая печь

Characteristics & Differences Between EAF VS SAF

Characteristics of Electric Arc Furnace VS Submerged Arc Furnace

1. Electric arc furnaces is a kind of industrial frequency electric furnace that uses electric arc energy to smelt metal. Electric arc furnaces used in industry can be divided into three categories:

• The first category is direct heating type

• The second category is indirect heating type,

• The third category is called submerged arc furnace

Therefore, submerged arc furnace is also a kind of electric arc furnace.

1. Electric arc furnace is an electric furnace that uses the high temperature generated by the electrode arc to melt ore and metal. When the gas discharge forms an arc, the energy is very concentrated, and the temperature in the arc zone is above 3000℃.

   For smelting metal, it can effectively remove impurities such as sulfur and phosphorus, the furnace temperature is easy to control, the equipment occupies a small area, and is suitable for the smelting of high-quality alloy steel.

   
   

2. Submerged arc furnace uses high resistivity ore as raw material. It is mainly used for reducing smelting ore, carbonaceous reducing agent and solvent and other raw materials. It mainly produces ferrosilicon, ferromanganese, ferrochrome, ferrotungsten, silicon-manganese alloy and other ferroalloys, which are important industrial raw materials in the metallurgical industry and chemical raw materials such as calcium carbide. Its working characteristics are the use of carbon or magnesium refractory materials as furnace lining and the use of self-heating electrodes.

   
   

Difference: Electric Arc Furnace VS Submerged Arc Furnace

Properties:

1. Electric Arc Furnace: It is an electric furnace that uses the high temperature generated by the electrode arc to melt ores and metals.

   EAF can be divided into three-phase electric arc furnaces, consumable electric arc furnaces, single-phase electric arc furnaces and resistance electric arc melting furnaces according to the arc form.

2. The furnace body of the electric arc steelmaking furnace consists of a furnace cover, a furnace door, a steel tapping trough and a furnace body. The furnace bottom and furnace wall are built with alkaline refractory materials or acidic refractory materials.

3. Electric arc steelmaking furnaces are divided into ordinary power electric arc furnaces, high power electric arc furnaces and ultra-high power electric arc furnaces according to the transformer capacity per ton of furnace capacity.

4. Electric arc furnace steelmaking is to input electrical energy into the electric arc steelmaking furnace through graphite electrodes, and use the arc generated between the electrode end and the charge as the heat source for steelmaking.

5. The electric arc furnace uses electric energy as a heat source and can adjust the atmosphere in the furnace, which is extremely beneficial for smelting steel containing more easily oxidized elements.

   With the improvement of electric arc furnace equipment and the improvement of smelting technology, the development of the power industry, the cost of electric arc furnace steelmaking has continued to decline. Now electric arc furnace steelmaking is not only used to produce alloy steel, but also used in large quantities to produce ordinary carbon steel. Its proportion in the total steel production of major industrial countries continues to rise.

Submerged arc furnace: also known as electric arc furnace or resistance furnace. Its an industrial electric furnace with huge power consumption.

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

2. Its for this reason that the natural power factor of the submerged arc furnace is difficult to reach above 0.85. The natural power factor of most furnaces is between 0.7 and 0.8.

   Improving the power factor of the short network and reducing the imbalance of the power grid has become a way to reduce energy consumption. If appropriate measures are taken to improve the short-circuit power factor, the following effects can be achieved:

   Reducing production power consumption by 3%~6%;

   Increasing product output by 5%~15%.

   
   

Characteristics

1. Electric Arc Furnace:

The electric arc furnace has greater process flexibility than other steelmaking furnaces, can effectively remove impurities such as sulfur and phosphorus, the furnace temperature is easy to control, the equipment occupies a small area, and is suitable for the smelting of high-quality alloy steel.

2. Submerged Arc Furnaces: 

Its working characteristics are the use of carbon or magnesium refractory materials as furnace linings and the use of self-training electrodes. The electrodes are inserted into the charge for submerged arc operation, and the energy of the arc and the current passing through the charge are used to generate energy due to the resistance of the charge to melt the metal, and the charge is added successively, and the iron slag is discharged intermittently, and it is an industrial electric furnace that operates continuously.

The above is the knowledge about electric arc furnace VS submerged arc furnace. As star equipment in the smelting industry, they have their own characteristics and advantages. You can choose a suitable smelting furnace to use according to the project requirements such as raw materials and smelting materials.

If you have any questions or needs, please contact Sanrui Furnace. Our professional and fast sales team and technical team will give you a solution and suggestions.