钢铁钒钛

A STUDY OF DIRECT HOT CHARGING OF PANGANG'S CONTINUOUS CAST SLAB AND RELATIVE TECHNOLOGY

Xue Nianfu, Hu Zuoxing, Li Anlin, Lei Bo, Yan Zhongxiang, Pan Changfen

1997, 18(3): 1-7.

Abstract(31) PDF(0)

Abstract:
Based on the present condition of direct hot charging technology of Pangang's continuous cast slab, a mathematical model of direct hot charging and reheating of continuous cast slabwas developed. The industrial test of production mode was conducted. The relation between the surface qualily of slab be fore rolling and surface quality of hot strip coil was investigated. The management measures of direct hot charging of continuous cast slab and operation sequence of reheating furnace were established. The statistic results of production practice show the rate of direct hot charging of slab is increased from 16.7% in 1995 to 36.9% in 1996. The average temperature of slab coming into reheating furnace is 565℃.

LABORATORY EXPERIMENT OF HOT AIR SINTERING FOR VANADIUM-BEARING TITANOMAGNETITE CONCENTRATE WITH HIGH TITANIUM OXIDE CONTENT

Gan Qin

1997, 18(3): 8-13.

Abstract(23) PDF(0)

Abstract:
Through the laboratory experiment under the condition which could be realized at Panzhihua Iron and Steel Corp., the present paper discusses the effects of hot air sintering on the sintering Process and the sinter quality including the adaptable process parameters for vanadium-bearing titanomagnetite concent rate with high titanium oxide content. The experiment has proved that the hot air sintering could significantly improve the Sinter strength, sinter yield and utilization coefficient and decrease the fuel consumption.

TEST ON BUILDING SINGLECOURSE-BRICK LINING TECHNOLOGY OF CONVERTERS AT PANGANG

Ge Wensun, Wang Jian, Zheng Xiaofeng, Ji Kebin, Song Guoju, Wang Jun, Xu Weihua, Liu Zhenjing, Li Huayin

1997, 18(3): 14-19.

Abstract(17) PDF(0)

Abstract:
This paper shows the actual results of increasing lining life has been achieved by using technology widely to build the singlecourse-brick lining of the converter in the world, in order to save the problems of converter's inner shape and its lining material in PISC. Finally, a proper countermeasures have been given for saving the present problems of building singlecourse-brick lining technology.

EFFECTS OF CARBON CONTENT IN STEEL AND VISCOSITY OF CASTING POWDER ON LONGITUDINAL SURFACE CRACKS FORMATION ON CONTINUOUS CAST SLABS

Li Zhongchao, Du Dexin, Gu Wuan, Wang Yicheng, Li Maolin, Wang Zhongyuan, Liu Nanping, Zhang Junxiang

1997, 18(3): 20-23.

Abstract(29) PDF(0)

Abstract:
The factors that cause longitudinal surface cracks formation on the Pangang's continuous cast 09SiVL steel slabs are analysed. The results show that carbon content in molten steel is the decisive factor of longitudinal surface cracks formation on the slabs and that effect of viscosity of casting powder on Iongitudinal surface cracks formation on the slabs is obvious. ln order to remove the longitudinal surface cracks. the carbon content in molten steel must be controlled in the range of 0.08%~0.10%. When the carbon content in molten steelis in the range of 0.11%~0.13%, the casting powder of medium viscosity is used so as to decrease the longitudinal surface cracks of continuous cast slab.

CONTINUOUS CASTING PROCESS FOR X52 LINEPIPE STEEL AT PANGANG

Gu Wuan, Yan Xuemo, Gong Lixin, Li Maolin, Huang Jihong, Tang Xiangdong

1997, 18(3): 24-28.

Abstract(22) PDF(0)

Abstract:
The present paper introduces the schedules of the temperature, slab withdrawing and cooling, feeding rare earth cored wire into mold and the selection of mold casting powder, etc. With the analysis conducted on the quality status of continuous cast slabs at Panzhihua Iron and SteelCorp.

RE-GRINDING AND RE-DRESSING OF PRIMARY CONCENTRATE RECOVERED FROM TAILINGS OF ORE DRESSING

Huang Qiong

1997, 18(3): 29-33.

Abstract(14) PDF(0)

Abstract:
The experimental study on the re-grinding of primary concentrate has been conducted through the investigation and analysis on the process to recover iron concentrate from tailings of ore dressing. The results indicate that iron concentrate of 51.50% grade could be obtained after regrinding of primary concentrate and the production of iron concentrate could be raised.

NON-METALLIC INCLUSIONS IN CONTINUOUS CAST STRAND

Dai Yunge, Cai Xinian, Guo Zhongwen, Du Dexin

1997, 18(3): 34-39,50.

Abstract(16) PDF(0)

Abstract:
The present paper describes in detail the source of non-metallic inclusions and their distribution in continuous cast strand including the factors affecting the quantity and sile of inclusions and the way to decrease them.

PHYSICAL PROPERTIES OF MOLD CASTING POWDER AND FACTORS AFFECTING THEM

Zhao Xingwu

1997, 18(3): 40-47.

Abstract(20) PDF(0)

Abstract:
The present paper briefly describes the functions, phpoical properties of mold casting powder and factors influencing the properties, pointing out the of slabs requirements for physical properties of casting powder used for the high speed continuous casting.

CAUSES OF FORMED TAIL CRACKING OF PANGANG'S WIRE ROD

Chen Wenzao, Yu Haibo

1997, 18(3): 48-50.

Abstract(18) PDF(0)

Abstract:
The formed split end and tail cracking of wire rod during rolling are a common sight.The causes of formed tail cracking of wire rod are analyzed. The formation process of tail cracking is described. The countermeasures are put forward.

INVESTIGATION AND ANALYSIS OF PANGANG'S BF COOLING FACILITIES DAMAGE AND SHELL DEFORMATION

Li Zhencai, Zhang Wenxin

1997, 18(3): 51-55.

Abstract(20) PDF(0)

Abstract:
The investigation was conducted of both the damage of cooling facilities and the furnace shell deformation for Pangang's blast furnaces, and the analysis to the factors influencing the damages of Pangang's BF lining and cooling facilities were made as well with the suggestions raised for extending the service life of BF lining and cooling facilities.

REBUILDING DESIGN OF FINISHED PRODUCT TRANSPORT SYSTEM FOR LIMESTONE QUARRY AT PANGANG

Dang Yuchun

1997, 18(3): 56-59,73.

Abstract(15) PDF(0)

Abstract:
After the rebuilding aimed to solve the problems in the transport system of finished product for Limestone Quarry, the good results have been achieved, which effectively solved the prohlems such as frequent equipment faults, difficult repair, dropping and powder pollution of finished primary lime occurred during transportation, etc. and prolonged the repair period with the minimization of spare part consumption and the reduction of labor intensity.

METALLIC MOLD CASTING PRACTICE OF COMPOSITE INLAY CAST GEAR RING

Yin Silin

1997, 18(3): 60-63.

Abstract(16) PDF(0)

Abstract:
Both the structural feature of bimetal composite inlay cast gear ring and the original manufacturing process are introdueed in the present paper. The process of metallic mold casting for bimetal composite inlay cast gear ring is proposed with the highlight in the illustration of metallic mold design method. The bimetal eomposite gear ring produced by the metallic mold process has the characteristics of high dimensional accuracy, less machining, fine and compact structure of wearing layer and good technical and economic results.

PERFORMANCE AND CHARACTERISTICS OF 1350 SLAB CONTINUOUS CASTING EQUIPNIENT AT PANGANG

Li Jianquan

1997, 18(3): 64-69.

Abstract(15) PDF(1)

Abstract:
The present paper introduces the design parsmeter, performance and characteristics of 1350 slab continuous casting equipment at Pangang, pointing out the problems occurred in production process and the relevant solutions.

APPLICATION OF SOLID SELF-LUBRICATING MATERIAL IN SMALL HOOK HINGED SLIDER OF 1150 BLOOMER'S UNIVERSAL SPINDLE

Li Liuqiang, Wang Jingsong, Hu Bo

1997, 18(3): 70-73.

Abstract(11) PDF(0)

Abstract:
The present paper illustrates how the solid self-lubricating material was used to have greatly lengthened the service life of small Hook hinged slider and to have solved the problem of frequently replacing small slider of 1150 bloomer which used to affect the operation rate at Primary Rolling Plant of Pangang.

1997 Vol. 18, No. 3