History Of The Development Of Vanadium Nitrogen Alloys

Vanadium nitrogen alloy is difficult to develop and belongs to the top cutting-edge technology in the metallurgical industry. At present, only the United States VAMETCO company and Pangang Steel can produce in the world. Panzhihua Steel through scientific research, the first more advanced than foreign "non-vacuum continuous production technology, to fill the gap in the field of vanadium nitrogen alloy production in China in 1998, the United States vanadium company for the first time to China to promote vanadium nitrogen alloy, in Panzhihua Steel inspection stressed that" more than 20 years, Germany, Russia, Japan have studied vanadium nitrogen alloy, all claim to have developed vanadium nitrogen alloy production technology, but more than 20 years have passed they have not been able to mass production. Vanadium nitrogen alloy production knowledge is very big, only we can really commercial production." At the same time, the technical cooperation willingness proposed by Pangang resolutely refused and challenged "you develop it, I buy yours". After years of research, in September 1996, Panzhihua Iron and Steel began to project "Research on the production of vanadium carbide and vanadium nitride with V203" and passed the "National science and technology research project review, after several years of painstaking exploration, and finally achieved the success of vanadium nitrogen alloy industrialization technology. The success of this technology not only breaks through the global exclusive monopoly of the United States, but also makes the process technology more advanced, reaching the international leading level, and forming a patented technology with independent intellectual property rights. The industrialization technology of vanadium nitrogen alloy of Panzhihua Iron and Steel exceeds the similar technology of Vametco company in the United States, which is mainly reflected in: first, Panzhihua Iron and steel can produce in non-vacuum rather than the high vacuum environment required by Vametco company, with simple equipment, lower requirements, strong stability and less equipment investment; Second, Pangang process can continuously produce, reduce energy consumption and show bodhi high labor productivity; Third, in Panzhihua Steel process, carbonization and nitriding reaction are carried out simultaneously, the process flow is simple, and the operation cycle is short. From 2002 to 2004, Panzhihua Steel quickly reached an annual production capacity of 2000 tons of vanadium nitrogen alloy in 3 years. In June 2002, the 300ta1 industrial test push-plate kiln was completed and put into operation. In 2003, due to the breakthrough of the key technology of the 300t/a industrial test push-plate kiln, Panzhihua Steel decided to officially realize the industrialization of production, and the industrialization project was supported by the state and was listed as a national high-tech industrialization project; In August 2003, the second and third 300ta industrial equipment of Panzhihua Steel was completed and put into operation successively, so that the production capacity was expanded to 1000ta; In June and July 2004, three new 300t/a industrial equipment of Panzhihua Steel were put into operation successively, making the total production capacity of vanadium nitrogen alloy of Panzhihua Steel reach 2000t/a.