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Four-Electrode DC Plasma Smelting Furnace

China Four-Electrode DC Plasma Smelting Furnace

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Four-Electrode DC Plasma Smelting Furnace

MOQ： 1 unit
Price： The price will be negotiated based on the technical requirements and supply scope of Party A
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Payment Terms	L/C,T/T,Western Union
Supply Ability	Complete production supply chain, supply on time, and meet quality standards
Delivery Time	2 months
Packaging Details	Discuss according to the specific requirements of Party A
Total Power	33000kva
Operatingtemperature	Up to 1600°C
Electrode Diameter	Φ300-600mm
Weight	Depends on model, generally 2-15 tons
Use	High-purity ternary power battery
Gas Use	New clean energy
Powersource	Electric or gas heating
Cost	Varies depending on size and features
Coolingsystem	Water-cooled or air-cooled
Country Of Origin	Shaanxi, China
Brand Name	Shaanxi Chengda
Model Number	Negotiate based on equipment processing capacity
Certification	ISO 9001
Place of Origin	China

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Product Details
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Product Specification


Payment Terms	L/C,T/T,Western Union	Supply Ability	Complete production supply chain, supply on time, and meet quality standards
Delivery Time	2 months	Packaging Details	Discuss according to the specific requirements of Party A
Total Power	33000kva	Operatingtemperature	Up to 1600°C
Electrode Diameter	Φ300-600mm	Weight	Depends on model, generally 2-15 tons
Use	High-purity ternary power battery	Gas Use	New clean energy
Powersource	Electric or gas heating	Cost	Varies depending on size and features
Coolingsystem	Water-cooled or air-cooled	Country Of Origin	Shaanxi, China
Brand Name	Shaanxi Chengda	Model Number	Negotiate based on equipment processing capacity
Certification	ISO 9001	Place of Origin	China
High Light	four-electrode DC smelting furnace ，plasma smelting furnace for ferroalloy ，DC plasma furnace with four electrodes

Four-Electrode DC Plasma Smelting Furnace

Equipment & Technical Specification Introduction

1. Equipment Overview & Working Principle

The four-electrode DC plasma smelting furnace is a high-temperature metallurgical unit equipped with four symmetrically arranged DC plasma torches/graphite electrodes and DC rectifier power supply plus plasma gas supply system. It generates high-temperature plasma arc at 5,000~8,000℃ by ionizing inert gas (argon/nitrogen) under direct current. Adopting DC transferred arc smelting process, a water-cooled anode is embedded at furnace bottom to form a complete conductive loop. Four electrodes are arranged symmetrically in a rectangular layout to realize uniform heating across the molten bath, which differentiates it from single-electrode furnaces and three-phase AC arc furnaces. It is specially designed for refractory metals, ferroalloys, solid waste recycling (red mud/aluminum residue), and precious metal recovery.

Process Flow: Mains AC → step-down transformation → rectified into DC → four cathode electrodes powered up + process gas fed → high-frequency ignition to form non-transferred pilot arc → transferred main arc ignited between cathode and bottom anode → raw materials melted by ultra-high plasma temperature; sealed furnace enables smelting under inert atmosphere with precise oxygen control.

2. Five Core Assemblies of Furnace Structure

(1) Furnace Body Assembly

Furnace Shell: Steel plate welded structure with water-cooled jacket, fully sealed negative-pressure design, fitted with flue gas hood for exhaust collection.
Furnace Lining: Magnesia-carbon brick/corundum castable for high-temperature zone; erosion-resistant precast refractory bricks at slag line; water-cooled copper crucible equipped for lab/pilot-scale furnaces while fixed refractory hearth for large industrial units.
Furnace Bottom: Embedded water-cooled metal anode (positive pole of DC circuit); optional electromagnetic stirring coil to homogenize bath temperature and chemical composition.

(2) Core Four-Electrode Plasma System

Four plasma torches/graphite electrodes mounted at four rectangular corners with independent servo lifting mechanism, hydraulic fine adjustment and automatic current/voltage stabilization.

Standard Plasma Torch: Water-cooled cerium-tungsten cathode + water-cooled copper compression nozzle with full jacket circulating cooling.
Two electrode options: ① Plasma torch for high-purity special metallurgy; ② Impregnated graphite electrode for ore reduction smelting. Four independent power circuits allow continuous low-load operation of remaining three electrodes when single unit under maintenance.

(3) DC Rectifier Power Supply System

High-voltage distribution → step-down transformer → high-power SCR rectifier cabinet with four independent DC current-stabilized power sources. Separate power loop for each electrode to suppress arc fluctuation and improve thermal efficiency at 78%~82%.

(4) Process Gas Supply System

Multi-channel precision pressure-stabilized gas supply for high-purity argon, nitrogen and hydrogen mixture. Process gas injected through center of plasma torches; furnace chamber adjustable between vacuum and slight positive pressure to realize oxygen-free smelting. Complete with mass flow meters, pressure regulators and emergency cut-off valves.

(5) Automation & Auxiliary System

PLC full-process automatic control for electrode lifting, power regulation, gas supply, cooling water interlock and real-time temperature monitoring; matched circulating cooling water station, flue gas dedusting system, sealed feeding unit and tapping/slagging mechanism.

3. Key Equipment Advantages

Symmetric four-electrode layout ensures even bath temperature with fluctuation ≤±50℃ and minimal component segregation, ideal for high-purity alloy & single crystal production.
Ultra-high plasma arc temperature (5,000~8,000℃ vs. max 3,000℃ of conventional AC arc), boosting melting efficiency by over 40% for refractory oxide such as alumina and red mud.
Stable DC current reduces electrode consumption by 35%~50% compared with three-phase AC furnaces to cut running cost.
Flexible atmosphere control: vacuum/inert/reducing atmosphere available via sealed furnace to avoid metal oxidation; precious metal recovery rate ≥92%.
High operational tolerance: independent four-circuit power design avoids full-line shutdown for single-electrode overhaul.

4. Main Application Fields

Special Metallurgy: Melting of Ti, Zr, W, Mo, Nb and other refractory metals, superalloy & high-entropy alloy for aerospace industry.
Solid Waste Resource Utilization: Red mud ironmaking, calcium aluminate smelting, silicon/ferrous metal recovery from steel slag/fly ash and hazardous waste vitrification treatment.
Ferroalloy Production: Metallic silicon, ferrosilicon, ferrochrome and ferronickel reduction.
Advanced New Materials: High-purity ceramic powder, nitride/oxide raw material synthesis.

II. Graded Technical Parameters (Lab / Pilot / Large Industrial Grade)

1. Lab Four-Electrode Vacuum Plasma Furnace (50~200kW, lab ingot sample)

Item	Specification
Rated Total Power	50kW / 100kW / 200kW (split into four equal single-torch power)
Single Electrode DC Parameter	No-load:80~120V; Working voltage:25~55V; Max single-pole current:1,500A
Ultimate Vacuum	6.7×10⁻⁴Pa, pressure rise rate ≤0.5Pa/h
Smelting Temperature	2,200~3,200℃
Single Batch Feeding Capacity	50g ~ 2kg
Protective Gas	High-purity Argon (99.999%), single-torch Ar flow:0.5~3Nm³/h
Total Cooling Water Consumption	8~25m³/h
Control Mode	PLC + HMI touch screen auto-control, auto high-frequency arc transfer

2. Pilot Industrial Furnace (500kW~3,000kW, semi-continuous batch production)

Item	Specification
Installed Total Power	500 / 1,250 / 2,500 / 3,000kW, evenly split into four power loops
DC Output	Working voltage:60~110V; Total current:3,000~25,000A (four-way equal split)
Daily Output	0.8~8 tons (varies by raw material property)
Power Consumption per Ton	520~750kWh/t for alloy smelting; 9,800~11,500kWh/t for metallurgical silicon reduction
Total Gas Consumption	12~45Nm³/h argon, switchable to nitrogen
Circulating Cooling Water	60~220m³/h, inlet water temp ≤32℃
Service Life of Furnace Lining	120~180 heats for regular smelting
Working Condition	Slightly positive sealed atmosphere, optional intermittent vacuum mode

3. Large-Scale Industrial Four-Electrode DC Plasma Submerged Arc Furnace (5MW~25MW, mass production line)

Item	Specification
Rated Installed Power	5MW~25MW with four independent rectifier power sources
Total Working Current	30,000~150,000A balanced among four poles
Daily Raw Material Handling	25~120 tons, finished product output:10~55 tons
Power Consumption per Ton	8,500~11,000kWh/t for ferroalloy; 600~900kWh/t for solid waste recycling
Plasma Process Gas	N₂-Ar mixed gas, total consumption:80~350Nm³/h
Total Cooling Water	350~1,200m³/h
Flue Gas Treatment	Negative-pressure gas collection + dry-type dedusting system
Automation	Full DCS remote control with intelligent electrode lifting & power stabilization

III. Optional Auxiliary Configurations

Electromagnetic Stirring System: 0~50Hz variable-frequency adjustable stirring intensity for molten bath.
Fully Sealed Continuous Feeder: Screw-type sealed feeding to prevent ambient air infiltration.
Vacuum Pump Unit: Mechanical pump + molecular pump set (optional for ultra-high purity material production).
On-line Temperature Measuring & Sampling: Continuous infrared pyrometer and in-furnace real-time sampling analyzer.

Company Details

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Business Type:

Manufacturer,Distributor/Wholesaler,Importer,Exporter,Trading Company,Seller 
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Year Established:

2003 
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Total Annual:

10millionUSD-10million
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Employee Number:

>139 
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Ecer Certification：

Verified Supplier 

Shaanxi Chengda Industrial Furnace Manufacturing Co., Ltd. is a high-tech enterprise specialized in the research, design, and manufacturing of various industrial furnaces, including AC and DC steelmaking electric arc furnaces, ladle refining furnaces, ferroalloy ore thermal furnaces, ferroall... Shaanxi Chengda Industrial Furnace Manufacturing Co., Ltd. is a high-tech enterprise specialized in the research, design, and manufacturing of various industrial furnaces, including AC and DC steelmaking electric arc furnaces, ladle refining furnaces, ferroalloy ore thermal furnaces, ferroall...

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Shaanxi CHENGDA Industry Furnace MAKE Co., Ltd.
Room 1201, Greenland Blue Ocean Building, Zhanba Yi Road, Yanta District, Xi'an City, Shaanxi Province, China
https://www.sxcd-furnace.com/

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