钢铁钒钛

EXPERIMENTAL STUDY ON MULTI-CIRLE BURDEN DISTRIBUTION Of NO. 4 BF BELLESS TOP AT PANGANG

Fu Weiguo, Sun Xiwen

1996, 17(1): 1-7.

Abstract(26) PDF(0)

Abstract:
The multi-circle burden distribution practice has been realized on the No. 4 BF belless top at Panzhihua Iron and Steel by the improvement of the top control system. Industrial tests on multi-circle burden distribution at No. 4 BF are introduced. The operational characteristics of multi-circle burden distribution on the home-made belless BF top are examined. And the operational parameters on multi-circle burden distribution and temperature control range suitable for No. 4 BF are specified.

STUDY ON GROWTH OF AUSTENITE GRAINS IN MICROALLOYED STEELS WELDING HAZ

Gao Jiasheng, Hong Yongchang, Wu Huiying, Yin Guiquan, Huang Xigao, Shi Bi

1996, 17(1): 8-11.

Abstract(27) PDF(0)

Abstract:
The Characteristics of austenite grains growth in Ti-N and Ti-Nb-N microalloyed steels welding HAZ have been studied by using of welding thermal simulation under different T_P and corresponding holding time condition. Test results indicate that the ability of microalloyed steels to resist growth of austenite grains is related not only to the Ti content but also to the Nb and N content.

STUDY ON ARGON BLOWING TECHNOLOGY FOR CONTINUOUS CASTING STEEL

Yan Xuemo, Jiang Huayi, Tan Zongrong, Huang Kangming, Li Guangzheng

1996, 17(1): 12-16,27.

Abstract(18) PDF(0)

Abstract:
Comparative experiments were conducted to investigate the metallurgical, effects of top,bottom side and bottom argon blowing techniques. The experiments suggest that both bottom and bottom side argon blowing techniques provide better metallurgical effects than top blowing process, obtaining steel quality satisfactory to continuous casting requirements.

SMELTING METAL CHROMIUM USING ALUMINOTHERMICS

Sun Zhaohui, Yang Yangjun

1996, 17(1): 17-21,36.

Abstract(22) PDF(0)

Abstract:
On the basis of the experimental results, the relation between the efficiency of recovering element chromium and proportion of metal aluminium in material and the energy sent out by every kilogram material was found out, At the same time, the relation between the contents of element Fe, Si, Al in the product and the proportion of metal aluminium in material was obtained. Then the mathematic model was established. According to this model and using the material containing 82.85%Cr₂O₃ (average value, it is far below 94% which is required before), the metal chromium was smelted. The average efficiency of recovering element Cr is 85.44%.

STUDY OF THE PAINT USED FOR PREVENTING SLAB FROM OXIDATION

Zhang Guocai, Sun Wenming, Ao Jinqing, Wu Bing, Shi Bing, Liu Jinwu, Liu Xuegang

1996, 17(1): 22-27.

Abstract(30) PDF(1)

Abstract:
The paint used for preventing slab from oxidizing at high temperature is introduced. The main material is quartz sand. The paint making process is simple, low cost. The paint can prevent heated slab from oxidizing effectively. The simulated test indicates that the paint can reduce the oxidizing loss of the heated slab by 60%~80% compared with the slab without the paint. The mechanism of the coating preventing slab from oxidizing at high temperature is discussed.

COMBINED LADLE LINING USING ALUMINIUM-MAGNESIA CARBON BRICK AT PANGANG

Luo Yuyong, Tang Xinhua

1996, 17(1): 28-32.

Abstract(12) PDF(0)

Abstract:
The ladle lining at Panzhihua Iron and Steel had been originally built with aluminium-magnesia castable refractory. After the start-up of the continuous caster, the lining life declined drastically, and steel leakage occured frequently at the slag line. To ensure normal continuous casting operation, the combined lining with aluminium-magnesia carbon and magnesia carbon bricks was adopted. Exellent results were obtained from the typical and scale-up tests of ingot casting and continuous casting, and an average service life of 78.3 heats was achieved.

ENRICHMENT OF FURTHER REDUCED TiO₂ SLAG BY DILUTE SULPHURIC ACID LEACHING

Yang Baoxiang, Li Zaimiao, Jiang Guoxing, Zhou Youquan, Liu Chaofu

1996, 17(1): 33-36.

Abstract(19) PDF(0)

Abstract:
A study has been made of the upgrading further reduced TiO₂ slag by dilute sulphuric acid leaching, The reactions and changes of different oxides in further reduced TiO₂ slag were investigated and analysed.

STUDY ON TEMPERATURE CONTROL DURING SEMI-STEEL STEELMAKING IN LD CONVERTERS

Pan ShuFan

1996, 17(1): 37-46.

Abstract(25) PDF(0)

Abstract:
The documented technoligies of temperature control and thermal compensation during semi-steel steelmaking are examined. Accordingly, proposals are given on improvement and modification of temperature control and thermal compensation technologies during semi-steel steelmaking Panzhihua Iron and Steel Co.

AUTOMATICAL CONTROL METHODS OF BOF STEELMAKING PROCESS

Yang Subo, Li Zhizheng, Du Dexin

1996, 17(1): 47-52.

Abstract(29) PDF(0)

Abstract:
Methods of automization of BOF steelmaking are discussed, In consideration of the reality of steelmaking process at Pangang, steps of realization of the automization of steelmaking process at Pangang are suggested.

DEVELOPMENT OF NON-QUENCHED AND TEMPERED STEEL AND CHANGE IN ITS CHARACTERISTICS

Tang DaiMing

1996, 17(1): 53-58.

Abstract(24) PDF(0)

Abstract:
The development of the non-quenched and tempered steel is fully summerized. A detailed investigation is made into its change in characteristics with development, ie., the chemical composition, manufacturing process, micro-structure, strenthening mechanism, properties, applications, grades and specifications. The complex micro-alloyed, cold strenthened, and bainitictype modified steels enjoy the widest and most applications, Based on the 49MnVS3 Steel, these steels are produced by lowering carbon, increasing manganese and silicon. To further improve toughness of the non-quenched and tempered steels, the warm forging, oxide metallurgy and forging residual heat quenching technologies are adopted.

STRENGTH ANALYSIS ON THE HOLDING DEVICE OF PACKING MACHINE USING SAP5 SHELL UNIT

Xia Wei, Wang Yongqing

1996, 17(1): 59-63.

Abstract(17) PDF(0)

Abstract:
The SAP5 programme shell unit is used to conduct three dimension finite element strength analysis on the holding device, the main force applied component of the rod coil packing machine which is developed and manufactured by Panzhihua Iron and Steel Co., The weak point has been found and measures taken to improve the structure have been proposed. Its modification is proved to be successful and rational through verification of the reconstructed structure.

COST ANALYSIS OF DESULPHURIZATION IN DIFFERENT METALLURGICAL PROCESSES

Li Yangzhou, Yang Subo, Chen Yu, Dong Yanhua

1996, 17(1): 64-68.

Abstract(27) PDF(0)

Abstract:
Desulphurization cost of different metallurgical processes such as in B.E., hot-metal pretreatment and in converter both at home and abroad is examined and compared. It is found by comparative analysis that hot metal pretreatment results in lowest cost and from technological viewpoint, is helpful to release the burden of blast furnaces and converters.

1996 Vol. 17, No. 1