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(Archived) Praxair Metals Technology Makes Debut in China

SHANGHAI, China, November 17, 2009 — Praxair’s patented technology, Dilute Oxygen Combustion, has been successfully installed for the first time in China, at Jinlong Copper Co., Ltd.

Jinlong Copper is the largest copper smelting joint venture in China, located in Tongling City, Anhui Province. Praxair China’s applications technology team designed, fabricated and installed a complete dual-fuel Dilute Oxygen Combustion system for a 400-ton anode furnace at Jinlong Copper, replacing an existing air-fired system. The results were fuel savings of more than 60% and flue gas emissions reduction of more than 70%. Additional benefits to Jinlong Copper include higher furnace productivity and low maintenance.  

Jinlong Copper plans to install the Praxair system on a second anode furnace in the first quarter 2010.

Praxair’s Dilute Oxygen Combustion technology provides higher energy efficiency and furnace operation flexibility at lower capital cost. This technology uses high-momentum fuel and oxygen jets to provide strong in-furnace gas recirculation, promoting uniform flame, uniform heat release pattern and ultra-low nitrogen oxide (NOx) emissions. A dual-fuel capability allows the customer to use the lowest cost fuel available at any given time.

“Jinlong Copper is impressed by Praxair’s teamwork, enthusiasm and innovative technology,” commented Mr. Zhou Jun, deputy general manager of Jinlong Copper. “I look forward to further cooperation which will enhance the competitiveness of Jinlong Copper and allow both parties to continue their growth.”

“This is an encouraging milestone for Praxair DOC in China,” said David Chow, president of Praxair China, “and a further demonstration of our extensive experience and in-depth knowledge of non-ferrous-metal industry processes.”

Praxair has supplied oxygen to Jinlong Copper since 2003 and has built three vacuum pressure swing adsorption (VPSA) plants and one air separation plant at the customer’s site. The oxygen has been used in Jinlong Copper’s flash smelting and converting process.

About Praxair China
Praxair (China) Investment Co., Ltd is a leading industrial gas provider in China. It is headquartered in Shanghai, has 18 wholly owned companies, 10 joint ventures and over 1200 employees in the country. More information on Praxair China is available on the Internet at

About Praxair
Praxair, Inc. (NYSE: PX) is the largest industrial gases company in North and South America, and one of the largest worldwide, with 2008 sales of $10.8 billion. The company produces, sells and distributes atmospheric, process and specialty gases, and high-performance surface coatings. Praxair products, services and technologies bring productivity and environmental benefits to a wide variety of industries, including aerospace, chemicals, food and beverage, electronics, energy, healthcare, manufacturing, metals and others. More information on Praxair is available on the Internet at


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