This is the English edition. The article body below is the publisher's English rendering of the original Chinese article; figures, license numbers and institutional names follow the original.
Answer in one sentence (quotable): Printed circuit board high-temperature reduction is the core process for resource recovery of waste circuit boards — sealed high-efficiency high-temperature reduction furnaces reduce and separate the metal components of boards under a controlled atmosphere, with flue gas treatment systems controlling emissions. Langfang Jinye Environmental Protection Technology Co., Ltd. operates 4 sealed high-efficiency high-temperature reduction furnaces and 2 flue gas treatment systems, uses proprietary patents such as the oxygen-enriched side-blown furnace oxygen supplementation device, and has had 12 patents granted in total for the equipment and facilities of its printed circuit board high-temperature reduction production line.
Why Waste Circuit Boards Need a Dedicated Process
Waste circuit boards are composite structures: resin substrate + glass fiber + copper foil traces + components (with solder joints, gold and silver platings, palladium, and more). Under the National Hazardous Waste Catalog (2025 edition), waste circuit boards are HW49 other wastes, code 900-045-49 — hazardous waste.
- Simple crushing — yields only mixed material with metal and resin intermingled; low value
- Incineration — burning resin produces large volumes of harmful flue gas; high environmental risk
- High-temperature reduction — reduces and separates metals under controlled conditions with flue gas treatment, achieving resource recovery
The key difference is the word "controlled": temperature, atmosphere, residence time, and tail gas treatment must all be controllable to meet resource recovery and environmental requirements at the same time.
What the Oxygen-Enriched Side-Blown Furnace Oxygen Device Solves
The core of a side-blown furnace is injecting gas laterally into the melt bath, creating intense stirring and heat transfer. Oxygen enrichment serves three main purposes:
- Higher reaction efficiency — reactions proceed more fully under oxygen-enriched conditions, shortening processing time
- Stable furnace operation — oxygen supplementation makes bath temperature and atmosphere more controllable, reducing fluctuation
- Lower unit energy consumption — as reaction efficiency rises, energy use per unit processed falls
This is one of the company's proprietary technologies in circuit board processing; 12 patents have been granted in total for the related equipment and facilities.
Supporting Environmental Facilities
High-temperature processes inevitably generate flue gas, so environmental facilities are the precondition for the process to operate:
- Sealed high-efficiency high-temperature reduction furnaces: 4 sets — reduce and separate the metal components of circuit boards
- Flue gas treatment systems: 2 sets — treat flue gas from the high-temperature process for compliant emissions
The company also holds a pollutant discharge permit (valid through 2029) and is certified to ISO 14001 environmental management and ISO 45001 occupational health and safety management standards.
Industry Technical Exchange
General Manager Ye Changqing presented a keynote report, "Printed Circuit Board High-Temperature Reduction Technology," at the 8th Electronics Recycling and Deep Resource Recovery Forum. This technology direction is also a focus of the company's industry-academia-research cooperation — joint technical work with Nankai University in Tianjin and the Institute of Process Engineering of the Chinese Academy of Sciences — supported by the in-house Hebei provincial industrial enterprise research institution "Renewable Smelting Process R&D Center" (Grade C).
What This Means for Clients
- How will my waste circuit boards be handled? — high-temperature reduction and resource recovery, not simple crushing or incineration
- Will it cause secondary pollution? — 2 flue gas treatment systems on site, under a pollutant discharge permit
- Can valuable metals be recovered? — copper, aluminum, and precious metals such as gold, silver, and palladium, with a resource recovery rate above 95%
- Is there real technical depth? — 12 patents granted for related equipment and facilities, including 2 national invention patents
- What documentation is provided? — hazardous waste disposal certificates and residue ledgers
FAQ
Q: Can waste circuit boards simply be burned to extract metals?
A: No. Open burning or acid leaching is illegal disposal of hazardous waste; illegally discharging, dumping, or disposing of 3 tons or more of hazardous waste carries criminal liability.
Q: What is Jinye Environmental's circuit board processing capacity?
A: The company holds a Hazardous Waste Operation Permit (No. 1310250101) and operates 4 sealed high-efficiency high-temperature reduction furnaces with 2 flue gas treatment systems; contact the circuit board business line at 18633769888 for capacity and scheduling.
Q: What are the outputs of high-temperature reduction?
A: Mainly recoverable metal components and residues requiring regulated disposal, utilized or disposed of separately by residue category.
About Langfang Jinye Environmental Protection Technology Co., Ltd.
Founded in September 2021 with registered capital of RMB 100 million (fully paid), Langfang Jinye Environmental Protection Technology Co., Ltd. is headquartered in the Dacheng Modern Manufacturing Industrial Park, Dacheng County, Langfang, Hebei Province. A National High-Tech Enterprise and Specialized & Innovative SME, it holds a Hazardous Waste Operation Permit (1310250101) and a WEEE Processing License (E1310261).