钢铁钒钛

BLOW-IN AND OPERATION FOR PANGANG 2^# BLAST FURNACE

Sun Xiwen, Fan Yundong, Li Pingwei, Chen Mingquan, Diao Risheng

1999, 20(1): 1-5.

Abstract(46) PDF(1)

Abstract:
The blow in and operation for Pangang 2^# blast furnace were introduced. Based on blow in experience of the past and by means of new technical measures, the utilization coefficient of 2^# blast furnace comes up to 1.938 t/(m³·d) 6 days after blowing in.

LONG CAMPAIGN LIFE PRACTICE OF 4^# BLAST FURNACE AT PANGANG

Liu Shufang, Li Pingwei, Xie Junyong

1999, 20(1): 6-10,15.

Abstract(54) PDF(1)

Abstract:
The practical experience for long campaign life of 4^# blast furnace at Pangang was introduced.Based on the metallurgical characteristics of V-Ti-bearing magnetite, the important measures were adopted for the critical positions of furnace body of 4^# blast furnace.The operating technology used for extending campaign life of blast furnace was developed in the course of production, thus coming up to 12 years campaign life.

WATER MODELLING OF FLUID FLOW PATTERN IN SLAB CONTINUOUS CASTER MOLD AT PANGANG

Ma Fanjun, Wen Guanghua, Li Gang, Zhao Kewen, Song Guoju, Wang Jun, Zhao Qicheng

1999, 20(1): 11-15.

Abstract(48) PDF(1)

Abstract:
The fluid flow field in the mold of slab continuous caster at Pangang was investigated by means of water model.The effects of technical parameters, such as the structure and size of submerged entry nozzle, argon flow rate through stopper, and casting speed etc, on the fluid flow pattern in the mold were analyzed. Based on results obtained, the structure and size of submerged entry nozzle, and related technical parameters suitable for slab continuous casting process were optimized.

INVESTIGATION OF NON-METALLIC INCLUSIONS IN CONTINUOUS CAST SLAB PRODUCED AT PANGANG

Yan Xuemo, Du Dexin, Chen Yu, Zhong Jianli, Wang Dijun

1999, 20(1): 16-21.

Abstract(31) PDF(1)

Abstract:
Based on the results of investigation on non-metallic inclusions in continuous cast slab produced at pangang, non-metallic inclusions situation in continuous cast slab of 09CuPRe-B steel and their change during production were understood.The results obtained are used as the basis of clean steel production at Pangang.

DEVELOPMENT OF 35MnTiB STEEL USED FOR CREEPER TREAD OF BULLDOZER

Liu Ming, Tang Li, Lu Xiangyang, Chen Sukun, Zhao Anyin, Duan Youquan

1999, 20(1): 22-26.

Abstract(44) PDF(1)

Abstract:
The new 35MnTiB steel grade used for creeper tread of bulldozer was designed.As compared with existing 40SiMn2 steel used for creeper tread at home, the carbon and manganess contents of the new 35MnTiB steel decrease.After heat-treatment, the fracture of the creeper tread made of the new steel grade is decreased in service.The wear-resistance of the new creeper tread is little less than that of 40SiMn2 creeper tread.The service life of new creeper tread is extended.

PRECIPITATION BEHAVIOR OF CARBO-NITRIDE IN Nb-V MICROALLOYED STEEL DURING CONTROLLED ROLLING AND CONTROLLED COOLING

Yang Chunmei, Hu Yisu, Xin Yide, Peng Jian

1999, 20(1): 27-31.

Abstract(42) PDF(3)

Abstract:
The precipitation behavior of Nb(CN) and V(CN) in different stages during controlled rolling and controlled cooling was investigated. The role of precipitates in the steel in different stages was discussed. It is showed that the controlled cooling process after rolling has evident influence on the precipitation of carbo-nitride.

EFFECT OF END ROLLING TEMPERATURE AND COILING TEMPERATURE ON MECHANICAL PROPERTIES OF LOW CARBON Al-KILLED STEEL

Chang Jun, Zhang Kaihua, Cheng Xingde, Wang Dan

1999, 20(1): 32-37.

Abstract(41) PDF(1)

Abstract:
The effects of end rolling temperature and coiling temperature on the mechanical properties of low carbon Al-killed steel were investigated through field test and laboratory examination, The results show lower end rolling temperature during hot rolling leads to lower elongation value.The elongation value is little related to coiling temperature.The mechanical properties of cold rolled strip is closely related to end rolling temperature and coiling temperature.

RAIL HEIGHT CHANGE CAUSED BY ROLL STRAIGHTENING

Qin Yuan, Guo Hua, Lin Gefei, Wang Yanzhong

1999, 20(1): 38-43.

Abstract(44) PDF(1)

Abstract:
The contour size changes of rail before and after straightening, involving width of rail head, rail height and rail length, were measured.The causes of rail height decrease were analyzed.The deformation mechanism of rail height decrease was put forward by means of laboratory simulation.

CAUSES OF ADHERENDS FORMING ON THE SURFACE OF PICKLED SHEET AND COUNTER MEASURES

Huang Xu, Dong Jun, He Qiping, Lei Xiuhua, Yao Yongguo, Fang Shufang, Xu Hongjiang

1999, 20(1): 44-48.

Abstract(39) PDF(2)

Abstract:
The stability and phase structure of adherends in chlorhydric acid were analyzed by means of physico-chemical method.The results obtained fully have proved that pickled sheet produced by Pangang is corroded by water during water-washing, thus forming adherends on its surface.The factors influencing adherends formation were investigated.The measures to solve this problem were put forward.The measures were confirmed to be effective in industrial production.

EFFECT OF TECHNICAL PARAMETERS FOR RECLAIMING HYDROCHLORIC ACID ON QUALITY OF FERRIC OXIDE POWDER

Li Huabin, He Anxi, Cai Bin, Luo Yuhou, Chen Dongxu

1999, 20(1): 49-53.

Abstract(41) PDF(1)

Abstract:
The technical parameters for reclaiming hydrochloric acid, such as reaction temperature, the density of concentrated acid, air-gas ratio volume, quality of rinsing water etc on the quality of ferric oxide powder (by-product) were investigated.The reasonable technical parameters were put forward to ensure the quality of ferric oxide powder. The experiment to trial-produce magnetic material from ferric oxide powder was carried out at Pangang.The results show that the high grade permanent magnet can been made from the ferric oxide powder.The quality of the permanent magnet comes up to or surpasses Y30H-1 standard (SJ/T10410-93 standard).

OPTIMIZATION OF ENERGY MANAGEMENT SYSTEM USED FOR OXYGEN-RICH HIGH RATE PCI IN 4^# BLAST FURNACE AT PANGANG

Zhu Zizong, Shen Yongling

1999, 20(1): 54-57,64.

Abstract(44) PDF(1)

Abstract:
Based on field measurement of heat balance of Pangang 4^# blast furnace, the optimal energy management system used for smelting in blast furnace was developed by means of field experience and measured parameters.The effects of various operating variables on smelting process in blast furnace were discussed using the energy management system.

DEVELOPMENT OF TECHNOLOGY FOR CLEAN STEEL PRODUCTION

Du Dexin, Guo Xinchun

1999, 20(1): 58-64.

Abstract(34) PDF(2)

Abstract:
The technology for foreign clean steel production was introduced.Based on problems present in current smelting processes at Pangang, the technical measures which should be taken for clean steel production were put forward.

ANALYSIS OF APPLICATION OF SLAGLESS STEELMAKING TECHNOLOGY AT PANGANG

Wen Yongcai, Yang Subo, Tang Tianyu, Xu Lizhi

1999, 20(1): 65-70.

Abstract(44) PDF(2)

Abstract:
The state-of-arts of slagless steelmaking were introduced at home and abroad.The possibility for adoping slagless steelmaking technology at Pangang was analyzed.The some technical issues concerning slagless steelmaking were discussed.

1999 Vol. 20, No. 1