JangWon SM Co., Ltd. (JWSM) has designed, fabricated and installed industrial plant equipment since 2001, mainly for the Korean steel industry. The work is run from the head office in Anyang.
Three technologies form the core of this business: bulk cargo recovery for belt conveyors, camera vision systems for hot strip mills, and SF6 gas recovery and purification. Each was developed with the customer or with a university partner, the first two are described on their own pages, and the SF6 development is summarized below.
Core Technologies
| Technology | Function | Customers and record |
|---|---|---|
| Belt Conveyor Falling Cargo Recovery | Detaches the material that sticks to the return side of a belt conveyor, recovers it, and limits spillage and scattering along the conveyor line. | Development for POSCO Pohang and Gwangyang from December 2007. Belt cleaners fabricated, installed and serviced at POSCO Gwangyang from November 2009, continuing as of the company’s latest record (June 2022), and at POSCO Pohang from January 2011 to June 2012. Four Korean patents, granted between 2007 and 2011. |
| Camera Vision Technology | Detects crops that fail to separate from a hot strip bar and measures the cut length. A separate device detects a bar whose head bends upward. | Miss-crop detection and crop measuring systems delivered to all five POSCO hot strip mills – Pohang No.1 and No.2, Gwangyang No.1, No.2 and No.3 – between 2001 and 2006. The hot strip bar uptrend detection device was installed at one mill, Gwangyang No.3, in December 2005. In 2010 POSCO granted JWSM a license to work the miss-crop detection vision patents, for the purpose of supplying POSCO. |
| SF6 Gas Recovery and Purification | Draws out, purifies and refills the SF6 insulating gas used in high-voltage switchgear. | Research and development stage; no commercial supply record. Jointly developed with Korea University of Technology and Education (2005) and Toyohashi University of Technology, Japan (2009), and carried out as an industry-academia project with Seoul National University of Technology (2009). |
SF6 Gas Recovery and Purification
Sulfur hexafluoride (SF6) is used in high-voltage switchgear as an insulating and arc-quenching medium. It is also a potent greenhouse gas and it is expensive to buy, so gas taken out of equipment is worth recovering rather than releasing. Recovered gas picks up moisture, air and decomposition products in service, so it has to be purified before it can go back into equipment.
JangWon SM Co., Ltd. (JWSM) developed an apparatus that combines the three steps in one unit: drawing the gas out of the switchgear, purifying it, and refilling the equipment. The work was carried out with university partners in Korea and Japan between 2005 and 2009.
Development Status
This is a research and development program, not a catalog product. JWSM’s record for the SF6 apparatus consists of joint development with universities and of industry-academia research projects; the company has no commercial supply record for the apparatus. The underlying SF6 recovery patent is held by Seoul National University of Science and Technology (formerly Seoul National University of Technology), and JangWon SM works it under a license rather than owning the patent. It is presented here as part of JWSM’s environmental engineering development history.
Research and Development Record
| Date | Partner | Scope |
|---|---|---|
| June 2005 | Korea University of Technology and Education (KOREATECH), with Toyohashi University of Technology, Japan | Joint development of an SF6 treatment apparatus. |
| September 2008 | Seoul National University of Technology (now Seoul National University of Science and Technology) | Fabrication and supply of the piping for a toxic gas recovery and purification unit. |
| 2009 | Seoul National University of Technology | Industry-academia research project: development of an SF6 recovery apparatus. |
| 2009 | Toyohashi University of Technology, Japan | Joint development and technical advisory agreement on an SF6 detoxification treatment apparatus. |
Functions of the Apparatus
- Draws SF6 out of the equipment under recovery.
- Purifies the recovered gas so that it can be reused rather than released.
- Refills the equipment with the purified gas.
- Integrates the three steps in a single unit, so that the gas does not have to leave the site.
The development drew on JWSM’s academic network of the period, which included a professor of Toyohashi University of Technology in Japan.
Utilities, switchgear makers and research institutes interested in taking this development further are welcome to contact us through the contact page.
Steel Plant and Automation Projects
Alongside the three core technologies, JWSM has carried out machinery, electrical, instrumentation and control work for steelmakers and manufacturers in Korea.
- Dongkuk Steel – plate mill marking systems: side marking system for the plate mill (April 2001), automatic side marking and paint dot marking for No.2 plate mill (April 2002), stamping marking for No.1 plate mill (December 2003).
- Samsung Corning, Gumi – automation of the CRT transfer and inspection line (May 2003).
- POSCO Pohang – automatic fine coke extraction system for No.3 and No.4 blast furnaces, a field research project (April 2003); remote monitoring for the No.3 and No.4 power, coke and sintering plants (June 2003); argon gas purging system for No.2 and No.3 continuous casters, developed jointly with the POSCO research organization (April 2005); automatic sample extraction device for the No.1 HSL of No.2 hot strip mill (June 2005).
- POSCO Pohang and Gwangyang – approximately thirty machinery fabrication and installation contracts between 2001 and 2008, including supports and blind plates for the cold rolling plant, 22 sets of coil lifters, cranes, settling basins, and replacement of feeders, dampers, crushers and vibrators.
- Hansol CSN – automated warehouse system for the Seongbuk distribution center (January 2001) and an air pallet system for air cargo handling at the Incheon distribution center (May 2001).
- Hansol Electronics – automated warehouse for the Jincheon plant (July 2001).
- Electrical, instrumentation and control systems – Samsung Electro-Mechanics waste acid treatment (Suwon), Binggrae (Gwangju), Daewoo Heavy Industries (Incheon), Korea Institute of Industrial Technology (Cheonan), Hwacheon Metal (Incheon) and CAM Technology, 2002 to 2003; acid recovery control for Intertech (February 2003).
- Other – motorboat racing facility at the Misari regatta course for Daewoo Engineering and the Korea Sports Promotion Foundation (January 2002); scaling machine development for Wonwoo Precision (March 2002); sluice gate control system for the Songdo reclamation site, Incheon (IHS).
Engineering Resources
- Four Korean patents in bulk cargo recovery and belt conveyor cleaning, registered 2007–2011 (no longer in force).
- Patent license from POSCO for the miss-crop detection vision technology (2010).
- Founded in July 2000; incorporated in May 2002; present name adopted in May 2005.
For technical inquiries, please use the contact page.
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