钢铁钒钛

FUTURE DEVELOPMENT OF STEELMAKING TECHNOLOGY AND RELATED MEASURES AT PZH STEEL

ZHANG Da-de, LI Mao-lin, LI Yang-zhou, PENG Tao, ZHANG Yu-dong

2001, 22(3): 1-5.

Abstract(25) PDF(1)

Abstract:
The features of their steelmaking,refining and continuous casting processes were introduced after investigation of several steel companies in Europe.Based on shortcomings existing in steelmaking system at PZH Steel, in order to accomplish desulphurization of all hot metal,and refining and continuous casting of total molten steel,the existing techniques used for pretreatment of hot metal,converter steelmaking,molten steel refining and continuous casting processes must be reformed.The necessity to realize automatic control and computerized management of steelmaking system was put forward.

REVIEW AND PROSPECT OF EQUIPMENTS DEVELOPMENT AT VANADIUM RECOVERY AND STEELMAKING PLANT OF PZH STEEL

LIU Mao-jun, LUO Hao-chuan, LUO Zai-xiang

2001, 22(3): 6-10.

Abstract(31) PDF(1)

Abstract:
The first 120t converter was established at PZH Steel in the 1970S.Alongside development of steelmaking production and technical improvement, the more strict technical requirements on the reliability and functions of the equipments are set.Therefore,based on the analysis of the current situation of existing equipments at Vanadium Recovery and Steelmaking Plant of PZH Steel,the program of future development of equipments was put forward.

DEVELOPMENT AND PROSPECT OF TECHNOLOGY FOR VANADIUM RECOVERY FROM HOT METAL IN CONVERTER AT PZH STEEL

GE Wen-sun, ZHANG Yu-dong, LI Jian

2001, 22(3): 11-14.

Abstract(19) PDF(2)

Abstract:
A series of technical measures were used in view of the technical difficult points of vanadium recovery from hot metal containing lower vanadium content in converter. The results obtained and the dire ction of future technical development of vanadium recovery from hot metal in converter at PZH Steel were introduced.

PRODUCTION TECHNOLOGY FOR CLEAN STEEL AT PZH STEEL

LI Mao-lin, LI Zhong-chao, PENG Tao, CHEN Xiao-ping

2001, 22(3): 15-19.

Abstract(19) PDF(1)

Abstract:
The production technology for clean steel and test results were introduced at PZH Steel.The dephosphorization,desulphurization,degassing([O],[H])and decreasing nitrogen pick up processes for production of clean steel were analyzed. The technology for production of clean steel was developed using semi-steel as material at PZH Steel.

TECHNICAL ISSUES CONCERNING REALIZATION OF CONTINUOUS CASTING OF TOTAL MOLTEN STEEL AT PZH STEEL

ZHAO Ke-wen, WANG Jun, PENG Tao

2001, 22(3): 20-23.

Abstract(24) PDF(1)

Abstract:
The technical issues such as production technology and management lie ahead of PZH Steel if continuous casting of total molten steel is accomplished. The research work to be done was pointed out in order to achieve continuous casting of total molten steel successfully and as soon as possible.

DESULPHURIZATION OF HOT METAL AT PANZHIHUA IRON AND STEEL CO.

YE Xiang-fei, ZHANG Yu-dong, DU De-zhong

2001, 22(3): 24-27.

Abstract(23) PDF(1)

Abstract:
Based on current situation of desulphurization of hot metal at PZH Steel,the test(combination of hot metal ladle,desulphurization of hot metal,slagging-off and vanadium recovery from hot metal)was carried out so as to realize desulphurization of all hot metal and continuous casting of total molten steel.On the basis of the test results,the technical opinion for desulphurization of all hot metal at PZH Steel was put forward.

OPTIMIZATION OF CONTINUOUS CASTING TECHNOLOGY AT PANZHIHUA IRON AND STEEL CO.

ZHANG Da-de

2001, 22(3): 28-31.

Abstract(21) PDF(1)

Abstract:
A series of the related techniques for optimization of continuous casting process were used at PHZ Steel,such as improvement of ladle refining and tundish metallurgy for cleaning of molten steel,using compound roll,lower overheating degree casting and casting powder for high speed continuous casting,and optimization of the heat transfer model of secondary cooling zone etc.The production of the slab,the operation rate of the slab continuous caster were increased and the quality of the slab was improved under condition of high speed continuous casting by means of the above techniques

STUDY OF MELTING PROPERTIES OF CONVERTER SLAG CONTAINING VANADIUM AND TITANIUM OXIDES

WEN Yong-cai, ZHOU Jia-cong, YANG Su-bo, ZHANG Yu-dong, TANG Tian-yu, XU Li-zhi, LUAN Qiu-sheng, DONG Lü-ren

2001, 22(3): 32-36.

Abstract(15) PDF(1)

Abstract:
The melting temperature and its range of the converter slag containing vanadium and titanium oxides (different contents) were measured.The contents of vanadium and titanium oxides in the slag were determined by electron microscope.The reasons why the melting temperature of the slag containing vanadium and titanium oxides was lower than the Common slag were discovered.The way for the slag splashing using the slag containing vanadium and titanium oxides was put forward.

SLAG SPLASHING FOR STEELMAKING WITH SEMI-STEEL

YANG Su-bo, CHEN Yong, YANG Sen-xiang, WEN Yong-cai, LIU Xin, ZHANG Da-de, TANG Tian-yu, XU Li-zhi

2001, 22(3): 37-41.

Abstract(22) PDF(1)

Abstract:
The slag splashing for steelmaking with semi-steel is used in 120t converter at PZH Steel.The properties of the slag containing vanadium and titanium oxides,the selection of the slag composition,the optimization of slag formation process,the decreasing of TFe content in the final slag,the controlling of N₂ blowing parameters using slag splashing and the obtained results were introduced.

RH-MFB VACUUM TREATMENT OF MOLTEN STEEL

LI Yang-zhou, ZHANG Da-de, XUE Nian-fu, WANG Ming-dong, ZHANG Xiao-ling, LI Zhong-chao, DU Li-hua

2001, 22(3): 42-45,63.

Abstract(16) PDF(1)

Abstract:
The light treatment of LCAK and axle steels,the treatment of IF steel with vacuum decarbonization and vacuum oxygen decarbonization,and the deep vacuum treatment of rail steel and MFB heating molten steel and vessel were carried out in RH-MFB at PZH Steel.the effect of the model of decreasing pressure in the vessel and MFB oxygen blowing was analyzed on the carbonization rate.The influence of the vacuity in the vessel was discussed on the final carbon content in the molten steel.

CONTROLLING MODEL FOR SEMI-STEEL STEELMAKING IN 120 t CONVERTER AT PZH STEEL

TANG Tian-yu, YANG Su-bo, ZHANG Da-de, LIU Xin, CHEN Kun

2001, 22(3): 46-51.

Abstract(20) PDF(1)

Abstract:
The controlling model for semi steel steelmaking in 120t converter at PZH Steel was developed.The complicated steelmaking process was simplified into the controlling of oxygen blowing time.The test results by use of the controlling model show the perventage of hits comes up to more than 80%.The percentage of hits is 76.67% in inaustrial proauction.

PRETREATMENT OF HOT METAL CONTAINING VANADIUM AND TITANIUM AT PZH STEEL

CHEN Xiao-ping, YANG Su-bo, GE Wen-sun, CHEN Rong-gui, LIN Mao-qiang

2001, 22(3): 52-55.

Abstract(28) PDF(1)

Abstract:
The pretreatment process for hot metal containing vanadium and titanium at PZH Steel was introduced.First,the desulphurization of the hot metal is carried out. After desulphurization,the sulfur content in the hot metal is decreased from initial 0.04%~0.08% to less than 0.02%,even less than 0.01%.Second,the vanadium is recovered from the desulphurized hot metal in converter,the vanadium in the hot metal is made to come into vanadium bearing slag, the vanadium content in the hot metal is reduced from initial 0.32%~0.34% to less than 0.028%.The(V₂O₅)content in the vanadium bearing slag is about 19%.

STUDY OF DEOXIDIZING PROCESS USING METALLIC DEOXIDIZER

ZHANG Da-de, WANG Sheng, LI Mao-lin

2001, 22(3): 56-60.

Abstract(21) PDF(1)

Abstract:
The development and current situation of deoxidizing process for steelmaking,the use of deoxidizing materials at PZH Steel were introduced.The application of the deoxidizing process by use of metallic deoxidizer in recent years was described.The proposals for deoxidizing process ahead at PZH Steel were put forward.

OPTIMIZATION OF RAIL STEEL PRODUCTION TECHNOLOGY AT PZH STEEL

LI Gui-jun, LI Mao-lin, PU Xue-kun, WANG Bo, LIAO Jian-lin

2001, 22(3): 61-63.

Abstract(22) PDF(1)

Abstract:
In order to meet the increasing demands of user for the internal quality of the rail steel,the rail steel production technology was optimized at PZH Steel.The quality of the rail steel has been improved greatly by means of desulphurization of hot metal,improvement of deoxidation of molten steel,refining and casting processes.The internal quality of the rail steel comes up to 200 km high speed rail standards.

EXTENDING LIFE OF STEEL TAPPING HOLE OF CONVERTER AND STEEL TAPPING BY SLAG SKIMMING

WANG Jian, GAN Guo-jian, LIU Xin, XIONG Kai-wei

2001, 22(3): 64-67,72.

Abstract(20) PDF(1)

Abstract:
The good results such as extending life of steel tapping hole,stabilization of steel tapping time and temperature drop during steel tapping,decreasing slag carring over and increasing alloy recovery percent were achieved using integral change of steel tapping hole and steel tapping by slag skimming in 120 t converter at PZH Steel.The results above were of great advantage to reduce labour in tensity,stabilize operation and improve the quality of molten steel.

COUNTERMEASURE FOR THE PROBLEMS OF CONTINUOUS CASTING OF RE-TREATED STEELS

TANG Xiang-dong, SONG Wei, YANG Hui-ting, CHEN Tian-ming, CENG Jian-hua

2001, 22(3): 68-72.

Abstract(22) PDF(1)

Abstract:
While the RE-treated steels were cast at PZH Steel Co., the RE oxide (RE_xO_y) had influence on the properties of mold powders,which brought about low casting speed,high breakout rate and poor slab surface quality and also had the harmful effects on production and development of these steels.The countermeasures for strengthening the control of continuous casting and developing the proper mold powders were put forward based on the analyses of the difficult points continuous casting of RE-treated steels.

2001 Vol. 22, No. 3