"The burner and nozzle structure are not damaged in the slightest and are as good as they were before." On April 21, experts said at Shanxi Tongcai Industry and Trade Company when inspecting the Yuxing top-combustion hot blast stove equipped with a 1,860 cubic meter blast furnace that has been in good operation for seven years. This hot blast stove was put into production in July 2012, and set the highest monthly average wind temperature record in China (1314.7 degrees Celsius) from October to November of the same year, and it has not been surpassed so far. This once again demonstrates the excellent quality of Yuxing hot blast stove.

　　Henan Yuxing Hot Blast Stove Engineering Technology Co., Ltd. (hereinafter referred to as: Yuxing Company) is a collection of design, research and development of blast furnace hot blast stoves, burners for hot blast stoves, anti-seismic refractory products and high-performance perforated brick regenerators in key parts of hot blast stoves As an independent and innovative enterprise. Relying on independent innovation, it has successively invented Yuxing catenary top-fired hot blast stove, four-stage top-fired hot blast stove, swirl cross top-fired hot blast stove, and burners suitable for Kalu gold top-fired hot blast stoves, etc. , Formed a series of hot blast stoves with independent intellectual property rights. At present, Yuxing catenary top-fired hot blast stove and four-stage top-fired hot blast stove have become the first choice for large-scale blast furnaces in my country, and they have become famous overseas by taking advantage of the important opportunity of “One Belt One Road”.

Rooted in domestic stable development

　　Yuxing Company was initially mainly engaged in the manufacture of refractory materials, and its products were concentrated in refractory materials for blast furnace hot blast stoves. In order to fill the gap in domestic hot blast stove technology, Yuxing Company has been focusing on the refractory market for blast furnace hot blast stoves since 2003, and has carried out research on top-fired hot blast stoves. In the long-term production practice and research and development, Yuxing Company has applied for and obtained a series of national invention patents, has the conditions and ability to develop hot blast stoves, and has made the outstanding Yuxing hot blast stove brand.

　　The development history of Yuxing Company is the history of research, development and promotion of hot blast stove technology. In 2005, Yuxing Company invented the swirling cross-mixing short flame combustion top-fired hot blast stove technology, which has been successfully applied to more than 140 top-fired hot blast stoves such as Shuigang, Degang, Dagang, Chuanwei, Yanshan Iron and Steel, etc. in. In 2006, in order to further optimize the thermal efficiency, energy consumption and service life and other indicators, Yuxing Company developed the catenary vault-fired hot blast stove technology, and smoothly promoted and applied it. It is worth mentioning that the Yuxing catenary top-fired hot blast stove supporting the 1,860 cubic meter blast furnace of Shanxi Tongcai Industry and Trade Company was put into operation on July 12, 2012, and achieved an average monthly air temperature of 1314.7 from October to November of that year. Celsius (previously, China's highest monthly average wind temperature was 1309 degrees Celsius). In addition, its thermal efficiency, excess air coefficient, wind temperature and vault temperature difference, nitrogen oxide emissions and burner power are all significantly better than similar products. Shanxi General Talent's blast furnace has been in service for seven years. During the recent expansion and renovation inspection, the hot blast stove burner and nozzle structure provided by Yuxing Company are still intact.

　　In 2013, Yuxing Company was entrusted by Hebei Aosen Iron and Steel Company to transform the three-stage top-fired hot blast stove, which was completed and put into production in 2009 and is in service, into a catenary top-fired hot blast stove. . Before the renovation, the hot air outlet and vault of the hot blast stove collapsed, resulting in unstable air temperature, which affected the use. After the renovation, the wind temperature has been increased from about 1200 degrees Celsius to about 1250 degrees Celsius. The structure is stable and the high wind temperature has been used until now.

　　In 2016, Yuxing Company was commissioned by Jianlong Group’s Shanxi Jianlong Company to install the internal combustion hot blast stove, which is easily collapsed, has many short-circuit problems, and unstable air temperature, on the 1,380 cubic meter blast furnace that has been in operation for nine years. Without changes to the net, platform, and furnace shell, the internal combustion type is changed to the top combustion type. The above-mentioned problems have been effectively improved, and the wind temperature has been greatly increased, with the highest wind temperature even reaching 1280 degrees Celsius.

　　In 2017, Yuxing Company optimized and improved the structural defects of the three-stage top-fired hot blast stove, such as easy collapse and high-temperature burning of the combustion chamber, and developed a four-stage top-fired hot blast stove. Refractory expansion thermal stress and comprehensive concentrated stress are dispersed and transferred to the furnace shell, so that the vault and the straight section of the hot blast outlet are bi-stabilized, avoiding the phenomenon of furnace shell cracking due to comprehensive stress cracking and refractory damage and collapse. At the same time, Yuxing Company also invented a method to transform a three-stage hot blast stove into a four-stage structure hot blast stove.

　　Since 2017, there have been 13 new blast furnaces, capacity replacement or renovation projects in Hebei Province, a major steel province in my country, including the three 3,000 cubic meters blast furnaces of Hegang Group's Leting Group, including 13 blast furnaces above 2000 cubic meters, of which 11 blast furnaces have adopted Yuxing Top-fired hot blast stove technology (three are catenary top-fired hot blast stoves and eight are four-stage top-fired hot blast stoves). The choice of the iron and steel industry in Hebei, a major iron and steel province, proves that the Yuxing four-stage top-fired hot blast stove is the mainstream technology for the development of high-air temperature top-fired hot blast stoves for large-scale blast furnaces in the future.

Go abroad and become famous overseas

　　After 20 years of hard work, Yuxing Company has grown from a fledgling pioneer to a proficient connoisseur. While the domestic market is developing rapidly, Yuxing Company actively explores the international market and promotes its hot-blast stove technology and products to the world. The earliest international cooperation of Yuxing Company dates back to November 15, 2007, when Dr. Karukin from the Russian Karukin Company came here to seek cooperation. The Super Thermal Shock Resistance Brick (HRK) developed by Yuxing Company to adapt to the pre-combustion chamber for the burner of the Kalu gold top-fired hot blast stove, achieved 200 times intact in the 1100 degrees Celsius water-cooled thermal shock resistance test in China, and the test was abandoned. . Dr. Karukin sent the HRK products developed by Yuxing Company to the Ural University of Technology in Russia for 1300 degrees Celsius water-cooled thermal shock resistance experiments, which achieved 170 times intact and abandoned the test. For this reason, Mr. Karugin from Russia Karugin highly affirmed the HRK products and craftsmanship of Yuxing Company. Yuxing Company began to cooperate with Karugin Company in 2008, and authorized it to be the exclusive agent in the CIS region to distribute Yuxing top-combustion material technology and products. Since 2007, there have been 3200-5578 cubic meters blast furnaces in the world, including the JFE5000 cubic meter blast furnace in Japan, the 5578 cubic meter blast furnace in northern Russia, the 3800 cubic meter blast furnace in Pohang, South Korea, and the 3800 cubic meter blast furnace in Novolipetsk, Russia. The core parts of the pre-combustion chamber of the Kalu Jinding-fired hot blast stove are all made of HRK products and processes of Yuxing Company.

　　Since the implementation of the “One Belt, One Road” initiative in 2013, Yuxing Company has taken advantage of Dongfeng to accelerate the pace of “going out”. On March 5, 2014, Yuxing Company and Danieli Company signed an international cooperation agreement, authorizing it to promote the use of Yuxing hot blast stove technology in the international market. On August 2, 2016, Yuxing Company and Siemens VAI signed a hot blast stove cooperation agreement, authorizing the company to promote the use of Yuxing hot blast stove technology in the international market. At present, the cooperation between Yuxing Company and Siemens VAI has entered a substantive stage. The two are jointly bidding for the hot blast stove project of Russia's MMK11 3800 cubic meter large blast furnace, and plans to use Yuxing catenary roof in this project. Combustion hot blast stove technology.

　　In addition, Yuxing catenary top-combustion hot blast stove technology is also well-known in India. India’s largest steel company with an annual production capacity of 27.5 million tons-India's Tata Iron and Steel Company (Tata), India with an annual production capacity of 18 million tons The executives and experts of Jingdler Southwest Steel Company (JSW), the Iron and Steel Authority of India (SAIL) with an annual production capacity of 14.86 million tons, and the Indian Hoaphat Iron and Steel Company with an annual production capacity of 3.5 million tons have invited Yuxing Company to go to India for many times. Yuxing catenary top-fired hot blast stove technology research and exchanges, they have a high evaluation of the technology. At present, the first set of Yuxing top-combustion hot blast stoves for the 450 cubic meter blast furnace of India’s Atibirndustries has been completed and put into operation, and the air temperature has increased by about 150 degrees Celsius after it was put into operation. For this reason, when the company equipped another 450 cubic meter blast furnace with a hot blast stove, it chose Yuxing catenary top-fired hot blast stove for the first time without any doubt. India’s largest state-owned iron and steel design institute-Wheat Bran Engineering and Technology Company, has repeatedly invited Henan

　　Xing's technical docking has laid a good foundation for future cooperation. In addition, the CEO of India Atibirndustries is communicating with Yuxing in all aspects to discuss cooperation matters concerning the agent of Yuxing catenary top-fired hot blast stove in India. India's BMM company came here especially, and entrusted Yuxing company to supply Yuxing catenary top-fired hot blast stove for its 1,700 cubic meter blast furnace.

　　With the advancement of the "Belt and Road" construction, China's door to opening up is opening wider and wider, and opportunities for international cooperation continue to emerge. The trade exchanges between China and the countries along the “Belt and Road”, especially in Southeast Asia, are getting closer. For this reason, Yuxing Company "borrowed a boat to go to sea" and actively explored the Southeast Asian market. Yuxing Company has successively supplied Yuxing top-combustion hot blast stoves for two 450m3 blast furnaces of Vietnam Hefa Iron and Steel Company, and they have been operating well. At present, the Yuxing catenary top-fired hot blast stoves for the 600 cubic meter blast furnace of Indonesia Gulong Iron and Steel Group Lajiapas Company have been completed and ready for production.

　　In order to better meet the needs of international development, Yuxing Company has also established an international business department, which is responsible for opening up the international market and promoting international cooperation. At present, there are 550 450-3580 cubic meters of blast furnaces in the world supporting Yuxing's top-fired hot blast stoves with independent intellectual property rights, which have been highly recognized and widely praised by users around the world, and have successfully become the Yuxing brand in the international market.

Inherit the glory and continue to write the glory

　　Through 20 years of continuous technological innovation, practice and exploration, Yuxing top-combustion hot blast stove technology has become increasingly mature, due to its high air temperature and small temperature difference between the air temperature and the vault, small nitrogen oxide generation, and low carbon monoxide emissions. The comprehensive technical advantages such as stable structure, small footprint, and low investment are recognized by the Chinese steel industry and are favored by many internationally renowned engineering and technology companies.

　　From fledgling to proficiency, from learning and imitation to independent research and development, from being domestic to galloping internationally, Yuxing is adhering to the business philosophy of "development by science and technology, survival by quality, and development by reputation". Yuxing takes the revitalization of the national industry as its mission. Every step taken by the company in the course of 20 years of development is firm and powerful.

　　In the future, following the high-quality development of the “Belt and Road” construction, Yuxing Company will continue to draw a beautiful blueprint by relying on technological innovation to provide the global ironmaking industry with high-efficiency, high-air temperature, energy-saving, emission-reduction, stable and long-life hot blast stove supporting systems , To develop Yuxing top-combustion hot blast stove technology with independent intellectual property rights into the world's mainstream hot blast stove technology.