OREANDA-NEWS. May 13, 2011. Up to now, Baosteel self-integrated full hydrogen batch annealing furnace with best heat resistance among domestic counterparts has got 100 orders. The products are not only used by Baosteel Co.,Ltd. directly linked factories and stainless steel unit but are also welcomed by other domestic firms. The birth and promotion of this success marks that Baosteel equipment and technology have achieved leading level in this field, reported the press-centre of Baosteel.

It is said that in a cold rolling mill without full hydrogen batch annealing furnace , even if the equipment level reaches the world first rank, the cold rolling production line is still third-rate and high grade products such as auto-sheets and appliance sheets can not be produced. Similarly, in high-grade stainless steel cold rolling production line, the full hydrogen batch annealing furnace also has an irreplaceable role.

Only 200 tons in weigh, a full set full hydrogen batch annealing furnace covers the area of mechanical, hydraulic, ECI control system, explosion-proof and high temperature resistance technology and the operational requirements are stringent. For example, all cold rolled products which need internal microstructure adjustment require instant heat up and cooling. If the performance does not reach the required level, mechanical and electrical equipment can be easily cracked and damaged.

Full hydrogen bell-type furnace manufacturing technology had long been foreign monopoly. The imported full hydrogen batch annealing furnace was expensive, had long manufacturing cycle and spare parts supply operation was complex, which had troubled Baosteel for long. To solve this problem, Baosteel Research Institute, Baosight, Baosteel cold-rolled mill took the initiative in full hydrogen batch annealing furnace metallurgical equipment research and fully evoked their advantage in control software development and production technology. Under the tripartite collaboration, a self-integrated road of research, development, design and manufacture of full hydrogen bell-type furnace was paved.

Baosteel collaborative team had solved the issue of ECI control and hydraulic control. When advanced to the critical period in the research project, there were problems with the special structured cycling fan and high temperature resistant motor (over 900 degrees Celsius). In the several experiments, the cycling fan cracked and was damaged, long-term security and stability could not be guaranteed in high temperature resistant motor operation. Under the leadership of cadres and with the joint efforts of experts, engineers and technicians made bold attempts and finally solved the two difficulties.

At present, Baosteel full hydrogen batch annealing furnace has got 7 patents including bell type annealing furnace charging floor and petrol liquid gas burner. The high temperature resistant motor and constant voltage low noise combustion supporting fan which have self intellectual property also fill the domestic product blank. Apart from the application in Baosteel Co.Ltd. the products are also favored by Geron Co.,Ltd.(Nantong) and Rettig Co.,Ltd.(Haimen).