Submerged Arc Furnace Energy-saving Technology Combined Electrode System

author: Anna

2024-05-15

Submerged Arc Furnace Energy-saving Technology: Combined Electrode System

1. Technical Name: Submerged Arc Furnace Energy-saving Technology: Combined Electrode System

2. Technology fields and scope of application: Iron and steel industry, ferroalloys and chemical industry, calcium carbide, ferroalloys and other high energy-consuming industries

3. Current status of energy consumption and carbon emissions related to this technology

Currently, this technology can achieve energy savings of 1 million tce/a and reduce CO2 emissions by approximately 2.64 million t/a.

4. Main Technical Content:

1. Structural Features

(1) The contact between the conductive element and the electrode is plane contact, which changes the arc surface contact between the copper tile and the electrode, and changes the conductive mode;

(2) The electrode pressing and releasing system uses a hydraulic caliper, which is directly clamped on the ribs of the electrode. It has a simple structure and a small size.

2.Technical Effects

Improved electrical conductivity and increased electrical conductivity;
There is no need to reduce the load when the electrode is pressed and discharged, which improves the effective operation rate of the submerged arc furnace;
Since the conductive ribs extend into the electrode paste, the electrode is sintered well and soft breakage of the electrode basically does not occur;
The electrode pressure and release are accurate, and the operation is stable and reliable;
Since the contact between the conductive element and the electrode is plane contact, there is basically no electric shock.

Due to the above reasons, electrode accidents have been significantly reduced and the effective utilization rate of equipment has been significantly improved.

5. Technical Conditions

The production and installation of electrode shells requires high precision;
The conductive components are produced and installed with high precision, ensuring close contact and sliding between the conductive components and the electrode shell ribs;
The electrode sintering height is accurately controlled and no over-burning occurs.

6. Investment Amount and Benefits of Typical Projects:

The 6300kVA submerged arc furnace costs 1.6 million yuan; the 12500kVA submerged arc furnace costs 2.5 million yuan; the 25000kVA submerged arc furnace costs 3.1 million yuan.
The unit energy saving is calculated as 400-800kWh/t based on smelting 75 ferrosilicon.
The energy savings of the project are calculated as 8-16 million kWh based on a 25,000kVA submerged arc furnace.

Differences Between LF VD RH and VC Refining Furnaces

Submerged Arc Furnace Flue Gas Waste Heat Utilization Technology