Electric arc furnace is using electricity as fuel source, and utilizes the arc high temperature produced by electrode and furnace charge to heat and melts the furnace charge. It is widely using in production of normal steel, high quality carbon steel, various alloy steel, stainless, various ferroalloys. It is the key equipment in steel making factories, foundry factories, ferrous alloys making factories and etc.
Characteristic:
Smelting temperature is flexible to be controlled, production needs.
High heat efficiency, atmosphere inside furnace can be controlled.
Can remove the phosphorus, sulfur, oxygen and other impurities and improve steel quality.
Easy to control the chemical composition of steel, stable and high recovery rate of alloys.
Equipment is simple and shorter technological process.
Adoption of new technology:
Optimization design
Tubular water cooled furnace wall and furnace lid
Eccentric bottom tapping (ebt)
Copper-steel combined electrode arm
Cluster type large sectional area water cooled cables
Optimize large current system structure (energy-saving type)
Proportional valves hydraulic system
Basic level (plc) + procedure level ( industrial control computer) control system
Frequency control technique
Network technique
Standard export packaging
Ladle refining furnace
(a). Main application: ladle furnace is used for primary melting furnace(electric arc furnace, open-hearth furnace, converter)to refining molten steel, which is an important metallurgical equipment to the continuous casting, rolling.
(b). Features: this equipment has the features such as atmospheric pressure arc heating, vacuum degassing, argon stirring, blowing oxygen feed wire, pressure or vacuum feeding, temperature measurement, sampling, tv camera and frequency observation functions.
(c). Equipment consitution:
1. Ladle and ladle car;
2. Heating device (electrode control modes: manual control or automatic control using energy-saving bus bar and conduction arm).
3. Vacuum and detection system.
4. Hydraulic and control valve system.
5. Argon , oxygen, compressed air and water cooling systems.
6. Electrical control system (with plc control and crt image impersonation shown).
7. High voltage electric systems.
8. Large current line.
Package suitable for long distance sea transportation
Argon oxygen furnace is a kind of refining furnace, which is characterized by side-blowing oxygen through the bottom tuyere with an immersion way. When the tuyere center is blown in with oxygen, argon and mixed gas of nitrogen, the proportion of argen and oxygen should be adjusted, then, it can achieve the purpose of decarburizing and retaining of chrome. Argon and nitrogen are used as cooling gas for tuyere ring to extend the life of tuyere. It can get the best operation by controlling the flow of the tuyere ring. And the flow of the tuyere center and tuyere ring can be controlled in master-control room.
The burning loss of tuyere, refractories and chrome is influenced greatly by the temperature of molten steel. So we can offer a special online temperature measuring system to buyers.
We adopt secondary combustion of top lance technology. It can increase the volume of cold material put into the vod and shorten the duration of smelting, and guarantee the continuous casting for multiple furnaces at last.
We also use the charging system with a weigh on its multiple bunkers, which can be directly connected with control system of computer. Then the smelting cycle will be shortened and labor intensity will be reduced.
This equipment has a control system of intellectualized smelting process, which can decrease the consumption of all kinds of raw materials and gas during the smelting, and guarantee a stable quality of products.
New security design for smelting
It is aiming at the plugging of lance and the back-flow of molten steel which caused by electricity interruption during smelting process.
Aod series refining furnaces have a function to keep pressure of tuyere and contain uninterruptable power output to stop the above accidents, consequently improve the safety of smelting process.
Package suitable for long distance sea transportation
