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Zhang F.,Beijing Shougang International Engineering Technology Co.
Advanced Materials Research | Year: 2012

In recent years great progress is made in technical equipment of large blast furnace in China. A series of new process, technologies and equipment, integrated and developed on our own, are applied on newly built large blast furnaces and have been proved to be highly effective. After more than 20 years' development and innovation of the bell-less top equipment designed and developed on our own, it has reached the advanced level in the world in terms of equipment reliability and service life; fully-dry impulse bag filter dedusting technology of BF gas, which is also developed on our own, has gained technical breakthroughs in terms of optimized system design, gas temperature control, pneumatic conveying of dedusting fines; the integrated innovative high-efficiency long-life high-temperature technology, through applying high-temperature preheating technology of combustion air, improving heat transfer efficiency of hot blast stove and optimizing structure of the hot blast stove system, enables the blast temperature to reach 1250°C with BF gas as fuel.


Wang D.,University of Science and Technology Beijing | Wang D.,Beijing Shougang International Engineering Technology Co. | Wu S.,University of Science and Technology Beijing
ISIJ International | Year: 2014

Serpentine was applied as a magnesium additive upon preparing oxidized pellets of a Brazilian hematite concentrate, the effects of ballability, preheating and roasting performance were studied in this work. The results showed that with the increasing dosage of serpentine, the green ball moisture content was increased, the compressive strength was improved too, but drop strength and burst temperature were reduced. In terms of the preheated pellets, the compressive strength were increased first and then decreased, and last leveled off. The compressive strength of roasted pellets were all improved, especially the improvement was obvious when the roasting was conducted at the temperature of 1 280°C. When the serpentine ratio was constant, with the preheated temperature increasing, the compressive strength of preheated and roasted pellets were all improved. Mechanism analysis showed that the solid phase reaction could be promoted with addition of serpentine, and the consolidation strength of pellets would be increased also. Although the iron grade and reduction of pellets were reduced, the reducing swelling was decreased, but the softening begin temperature was risen, the softening range was narrowed, and the metallurgical performance of pellets was improved at the same time.


Zhang F.,Beijing Shougang International Engineering Technology Co.
6th Int. Congress on the Science and Technology of Ironmaking 2012, ICSTI 2012 - Including Proceedings from the 42nd Ironmaking and Raw Materials Seminar, and the 13th Brazilian Symp. on Iron Ore | Year: 2012

BF gas bag filter cleaning technology is an important technical innovation for energy saving, emission reducing and clean production for modern blast furnace. It can reduce significantly the fresh water consumption during iron making process and reduce environmental pollution. It has become the development direction of modern BF iron making technology. This paper explain the process flow and technical principle of BF gas dry bag filter cleaning, Introduce the research and application on dry bag filter cleaning technology of BF gas for 5500m3 blast furnace at Shougang Jingtang. The totally dry type low pressure pulse bag filter cleaning technology of gas self-developed has been applied successfully in 5500m3 blast furnace, and standby wet type gas cleaning system has been cancelled. Several key technologies have been developed including gas temperature control, anti-corrosion of pipe, measuring of dust content in gas, dense phase pneumatic transportation of collected dust etc. The totally dry gas bag cleaning technology has reached internationally advanced level.


Zhang F.,Beijing Shougang International Engineering Technology Co.
6th Int. Congress on the Science and Technology of Ironmaking 2012, ICSTI 2012 - Including Proceedings from the 42nd Ironmaking and Raw Materials Seminar, and the 13th Brazilian Symp. on Iron Ore | Year: 2012

Shougang Jingtang iron and steel plant engineering is an important project of China iron and steel industry structure adjustment and improvement of general technology and equipment level. Its annual output is 9.7 Mt/a, including two sets of 5,500 m3 blast furnace with annual hot metal output of 8.98 Mt/a. A number of innovative advanced technologies including bell-less top, dome combustion hot blast stove, blast furnace gas dry bag filter cleaning process and environmental protection screw slag granulation facility etc. are developed. In this paper description is given to the technical features and advanced technologies of the extra large sized blast furnace in Shougang Jingtang. Also introduction is made to blast furnace sinter charging by different fraction sizes, bell-less top equipment and control technology of burden distribution, high efficiency and long campaign life technology of blast furnace, high blast temperature with long campaign life technology of dome combustion hot blast stove, environment-friendly slag treatment technology, oxygen-enrichment pulverized coal injection technology and blast furnace gas dry type bag filter cleaning technology that are applied to the 5,500 m3 blast furnace at Shougang Jingtang.


Zhang F.-M.,Beijing Shougang International Engineering Technology Co.
Journal of Iron and Steel Research International | Year: 2013

At the beginning of 1990s, Shougang blast furnaces (BFs) No. 2, No. 4, No. 3 and No. 1 were rebuilt sequently for new technological modernization in succession. The campaign life of BFs No. 1, No. 3 and No. 4 reaches 16. 4, 17. 6 and 15. 6 years, respectively, and the hot metal output of one campaign reaches 33. 8, 35. 48 and 26. 37 Mt, respectively; the hot metal output of BF effective volume of one campaign reaches 13328, 13991 and 12560 t/m3, respectively, which reaches the international advanced level of BF high efficiency and long campaign life. In BF designing, several advanced BF long campaign technologies were adopted. BF proper inner profile was optimized, reasonable inner profile was adopted, and closed circulating soften water cooling technology was applied in 4 BFs. Double row cooling pipe high efficiency cooling stave was developed which could prolong the service life of bosh, belly and stack. Hot pressed carbon brick and ceramic cup hearth lining structure were applied and optimized. BF operation was improved continuously to ensure stable and smooth operation of BF. Hearth working condition control was strengthened, burden distribution control technology was applied to achieve reasonable distribution of gas flow, and heat load monitoring was strengthened to maintain BF reasonable working inner profile. Proper maintenance at the end of BF campaign was enhanced. Hearth and bottom service life was prolonged by adding titaniferous material and enhancing hearth cooling. Gunning of lining was carried out periodically for the area above tuyere zone. © 2013 Central Iron and Steel Research Institute.

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