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Syed Rashid Ahmed ButtShaanxi Chengda Industrial Furnace Co., Ltd. completed the commissioning of electric arc furnace, the workers carefully cooperated with Chengda engineers to learn and operate the equipment, showing the deep friendship and excellent cooperation between the people of China and Pakistan. -
AboubacarAfter more than 1 month of intense production and debugging, 2 sets of heat exchange flue gas settling chamber equipment has been successfully put into operation ~ All the personnel involved in the project have worked hard! ~ -
Ji-hwan【 Warm congratulations 】 Shaanxi Chengda Industrial Furnace Manufacturing Company in South Korea, North Chungcheong County precious metal smelting furnace equipment installation and careful manufacturing and strict commissioning, looking forward to the future in more fields to achieve mutually beneficial win-win cooperation!
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Plasma direct current electric arc furnace with World's leading technology/invention patents
| Place of Origin | Negotiate based on equipment processing capacity |
|---|---|
| Brand Name | Shaanxi Chengda |
| Certification | ISO 9001 |
| Model Number | Negotiate based on equipment processing capacity |
| Minimum Order Quantity | 1 unit |
| Price | The price will be negotiated based on the technical requirements and supply scope of Party A |
| Packaging Details | Discuss according to the specific requirements of Party A |
| Delivery Time | 2~3 months |
| Payment Terms | L/C,T/T,Western Union |
| Supply Ability | Complete production supply chain, supply on time, and meet quality standards |
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xProduct Details
| Highlight | Plasma arc furnace for steelmaking,DC electric arc furnace,Patented steelmaking furnace technology |
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|---|---|---|---|
Product Description
A plasma direct current electric arc furnace is a type of smelting equipment that uses a plasma arc as the heat source to melt and refine metals or alloys. Here is a detailed introduction:
Basic Introduction
- Composition: It is mainly composed of three parts: the plasma gun, the furnace body, and the DC power supply. The plasma gun is composed of a water-cooled copper nozzle and a water-cooled cerium-tungsten rod electrode. The furnace body is similar to an ordinary electric arc furnace, including a water-cooled furnace cover, furnace walls and furnace bottom built with refractory materials, and is also equipped with a furnace door and a tapping groove. A conductive bottom anode is buried at the furnace bottom to form a conductive loop.
- Working Principle: First, a DC voltage is applied between the cathode and the nozzle, and then argon is introduced. A high-frequency igniter is used to strike an arc, ionizing the argon to generate a non-transfer arc. Then, a DC voltage is applied between the cathode and the bottom anode of the furnace, and the plasma gun is lowered to make the non-transfer arc approach the charge, generating a transfer arc. Once the transfer arc is formed, the non-transfer arc is extinguished.
Characteristics
- High Arc Temperature: The arc temperature can reach about 20,000 °C, which can melt refractory metals such as tungsten, molybdenum, niobium, zirconium, titanium and their alloys.
- Controllable Atmosphere: By selecting different working gases such as argon and nitrogen, the furnace atmosphere can be controlled to achieve special metallurgical effects, such as smelting nitrogen-containing austenitic stainless steel.
- Avoidance of Carbon Increase: The water-cooled metal plasma gun replaces the graphite electrode, avoiding the carbon increase of the molten steel by the electrode, which is suitable for the smelting of ultra-low carbon stainless steel.
- Good Refining Effect: The inert gas in the furnace is similar to the vacuum melting effect, and the gas content in the molten steel is low. At the same time, high-basicity slag can be formed, and the desulfurization effect is good.
- High Alloy Element Recovery Rate: The recovery rate of various alloy elements during the smelting process is significantly higher than that of ordinary electric arc furnaces, and the recovery rate of most elements is above 96%.
Technical Parameters of Plasma Direct Current Electric Arc Furnace
The technical parameters of plasma DC electric arc furnaces vary significantly based on capacity specifications (ranging from laboratory small-scale furnaces to industrial large-scale furnaces) and application scenarios (special steel smelting, refractory metal processing, metal recycling, etc.). Below is a categorized summary of core parameters for both common industrial models and laboratory models:
1. Core Power Supply Parameters
| Parameter Index | Laboratory Small Furnace (≤500kg) | Industrial Medium Furnace (1 - 10t) | Industrial Large Furnace (≥20t) |
|---|---|---|---|
| DC Input Voltage | 200 - 400V | 450 - 800V | 800 - 1200V |
| Rated Current | 500 - 1500A | 2000 - 6000A | 8000 - 15000A |
| Rated Power | 100 - 500kW | 1 - 5MW | 10 - 30MW |
| Arc Voltage Stability Range | ±5V | ±8V | ±10V |
| High-Frequency Ignition Voltage | 5 - 10kV | 10 - 15kV | 15 - 20kV |
2. Plasma Gun Parameters
| Parameter Index | Single-Gun Configuration | Multi-Gun Configuration (Industrial Furnace) |
|---|---|---|
| Gun Material | Water-cooled copper nozzle + cerium-tungsten electrode | Water-cooled copper alloy nozzle + lanthanum-tungsten electrode |
| Cooling Water Flow Rate | 1 - 3m³/h per gun | 5 - 10m³/h per gun |
| Cooling Water Inlet Temperature | ≤30℃ | ≤28℃ |
| Working Gas Type | Argon (laboratory); Argon/nitrogen mixed gas (industrial) | Argon/nitrogen/hydrogen mixed gas (adjustable ratio) |
| Gas Flow Rate | 5 - 20L/min | 50 - 200L/min per gun |
| Arc Length Adjustment Range | 50 - 200mm | 100 - 300mm |
| Plasma Arc Temperature | 15000 - 20000℃ | 18000 - 22000℃ |
3. Furnace Body Structure Parameters
| Parameter Index | Laboratory Furnace | Industrial Medium Furnace | Industrial Large Furnace |
|---|---|---|---|
| Nominal Capacity | 10 - 500kg | 1 - 10t | 20 - 100t |
| Furnace Lining Material | High-alumina refractory brick + magnesia castable | Magnesia-chrome refractory brick + carbonaceous ramming mass | Corundum-magnesia refractory brick + ultra-high alumina castable |
| Furnace Lining Thickness | 80 - 150mm | 200 - 350mm | 400 - 600mm |
| Furnace Cover Structure | Water-cooled integral cover | Water-cooled segmented cover | Water-cooled lifting cover |
| Bottom Anode Material | Copper plate + conductive paste | Graphite electrode embedded + copper conductive layer | Copper alloy anode plate + high-conductivity refractory coating |
| Tapping Temperature | 1600 - 1750℃ | 1650 - 1800℃ | 1700 - 1850℃ |
4. Metallurgical Performance Parameters
| Parameter Index | Standard Index | Application Advantage |
|---|---|---|
| Alloy Element Recovery Rate | ≥96% (Ni, Cr, Mo) | Higher than traditional DC arc furnaces by 5 - 10% |
| Desulfurization Rate | ≥85% | Achievable with high-basicity slag system |
| Degassing Effect | [H] ≤2ppm; [N] ≤30ppm | Close to vacuum smelting effect without vacuum equipment |
| Carbon Content Control | ≤0.01% (ultra-low carbon steel) | No carbon increase from graphite electrodes |
| Continuous Smelting Cycle | 2 - 4h/batch (industrial furnace) | Shortened by 30% compared to ordinary arc furnaces |
5. Auxiliary System Parameters
| System Name | Key Parameters |
|---|---|
| Cooling Water System | Total flow rate: 10 - 500m³/h; Water pressure: 0.3 - 0.6MPa; Water quality: Conductivity ≤50μS/cm |
| Dust Removal System | Dust removal efficiency: ≥99.5%; Emission concentration: ≤10mg/m³ |
| Control System | PLC + touch screen control; Arc length automatic adjustment; Furnace temperature real-time monitoring (error ±10℃) |
Application Fields
- Special Steel Smelting: It is used to produce high-quality special steels such as bearing steel, ultra-low carbon stainless steel, heat-resistant steel, high-speed tool steel, precision alloy, superalloy and electric heating alloy.
- Refractory Metal Melting: It can melt and refine refractory metals and their alloys.
- Metal Recycling: It can be used to recycle metals from waste metals, slag, smelting waste residue and other materials to achieve resource recycling.
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