Project Overview
Direct current arc furnaces are increasingly chosen for research, special melting and resource recovery because they offer a stable arc, low network disturbance and precise power regulation. Shaanxi Chengda Industrial Furnace Manufacturing Co., Ltd. designs and builds DC arc furnaces for universities, research institutes and industrial plants.
Flagship Reference: Northeastern University Plasma DC Arc Furnace
Northeastern University's plasma DC arc furnace is a key research project within its metallurgical engineering discipline, aimed at efficient, green and intelligent metallurgy. Chengda's engineering team worked through repeated design iterations and trials with the university, achieving a series of key technical breakthroughs before the furnace was completed and shipped to the campus laboratory.
- Plasma heating - plasma torch combined with DC arc to reach very high temperatures with controlled atmosphere
- Process flexibility - suitable for reduction, melting and smelting trials on a research scale
- Data acquisition - power, temperature and gas parameters recorded for academic analysis
- Safety design - interlocked gas, cooling and power systems for laboratory operation
Industrial DC Installations
| Project | Unit | Application |
|---|---|---|
| Anyang, Henan | 2000kVA DC arc furnace | Industrial melting |
| Xuzhou | 500kg DC arc furnace | Refractory and precious metal melting |
| Dalian | 150kW DC arc furnace | High melting point materials |
| DC test arc furnace | 150kW | Precious metal material recovery |
Engineering Highlights
DC furnace design concentrates on three things: the rectifier and control system, the electrode and arc regulation, and the cooling of the hearth. Chengda's approach uses a robust rectifier with fast current control, a single electrode with hydraulic regulation and arc voltage feedback, and generously sized water-cooled panels with pressure and flow monitoring. The result is a furnace that holds a stable arc at low power - essential for research work - and can be scaled up for production duties.
Customer Value
Universities gain a reliable platform for metallurgical research; industrial users gain a furnace with low flicker, low maintenance and good control of melt chemistry. Both benefit from Chengda's practice of delivering complete documentation, commissioning records and operator training with every unit.
Delivery and Support
Every furnace was delivered with mechanical and electrical drawings, rectifier and control documentation, water pressure test records and commissioning reports, plus on-site training for research or production staff.
Where DC Furnaces Fit Best
DC arc furnaces are preferred where grid capacity is limited, where charge materials are fine or conductive, or where very high temperature with controlled atmosphere is required. They are also well suited to small and medium capacities where AC flicker and electrode consumption would be uneconomic.