钢铁钒钛

STUDY OF METALLURGICAL PROPERTIES OF MEDIUM-CONTENT TITANIA BEARING BLAST FURNACE SLAG

GUO Xing-zhong, LI Jing-ming, WEN Guang-yuan, ZHANG Bing-huai

2000, 21(1): 1-6.

Abstract(21) PDF(1)

Abstract:
The metallurgical properties(Viscosity,free running temperature etc.) of medium-content titania (TiO₂ 5%~15%) bearing blast furnace slag were systematically investigated by means of regression design of mixed burden and single component design.

STUDY OF ADDITIVES MIXED IN PULVERIZED COAL USED FOR PZH STEEL BLAST FURNACE

WEI Guo, DU He-gui, DIAO Ri-sheng

2000, 21(1): 7-11.

Abstract(34) PDF(1)

Abstract:
In order to improve combustion properties and enhance combusion of pulverized coal (PC), the combustion experiment was carried out after the PC used for PZH Steel blast furnace was mixed with different additives.Based on the feature of blast furnace operation, MnO₂, MgCO₃, MnCO₃, NaCl (table salt), MgCl₂, quick lime, CaF₂ and converter dust were chosen as additives.The results of the dynamic combusion experiment show that the ignition time of PC was shortened and the burning ratio was increased when PC is mixed with appropriate additives.The combustion-supporting effects of NaCl and quick lime were obvious among several additives.The amount of additive in PC should be determined on the basis of its effect on blast furnace operation.

ANALYSIS OF MOVEMENT ERROR OF MOLD OSCILLATING MECHANISM FOR CONTINUOUS CASTING

ZHAO Xian-jue, ZHAO Dai-qiong, LIU Yong-zhang, CHI Feng-zhi

2000, 21(1): 12-16.

Abstract(22) PDF(0)

Abstract:
The causes of movement error formed by mold oscillating mechanism for continuous casting and error influencing factors were described.The analytical method of movement error of the oscillating mechanism and the design and adjustment of the mechanism were introduced.

STUDY OF FURNACE BODY EROSION AND LONG LIFE FURNACE UNDER CONDITIONS OF INTENSIFICATION OF SMELTING PROCESS

SHI Shi-xiong, QI Shuang-yang, DIAO Ri-sheng, LI Jian

2000, 21(1): 17-23.

Abstract(19) PDF(0)

Abstract:
The furnace body erosion of 2^# blast furnace of PZH Steel at the end of second compaign wassystematically investigated.The causes for furnace body erosion were analyzed.The features of furnace body erosion were clarified under conditions of intensification of smelting process.The mechanism of lining protection was further revealed with TiO₂ bearing burden,the technical measures which make the blast furnace high efficiency and long compaign were put forward.

CHARACTERISTICS OF SINTERING OF BAIMA V-Ti-BEARING MAGNETITE CONCENTRATE

YU Wen-hua, HE Qun, FAN Fang-ling, WANG Huai-yong

2000, 21(1): 24-28.

Abstract(29) PDF(0)

Abstract:
The Characteristics of sintering of Baima V-Ti-bearing magnetite concentrate were analyzed.Compared With Panzhihua V-Ti-bearing magnetite concentrate,the Baima concentrate sintering is characterized by high vertical sintering speed and utilization coefficient of sintering machine,high in iron and vanadium oxides and low in titanium oxide and sulphide in the sinter.The softing,melting and dropping temperatures of Baima sinter were lower,which is beneficial to improve permeability of the burden in blast furnace.

ANALYSIS OF CAUSES FOR CROSS BREAKS DEFECT FORMATION DURING HOT STRIP UNCOILLING AND LEVELLING

WANG Dan, ZUO Jun, HUANG Xu-jin, KANG Ming, LUO Zhong-yun, CHEN Ji-Lin

2000, 21(1): 29-35.

Abstract(12) PDF(0)

Abstract:
Based on cross breaks defect formation during uncoilling of hot strip of low carbon steel,the bending deformation,stress distribution,yield point elongation and strain aging of the hot strip during uncoilling and levelling were analyzed by use of the knowledge,such as elastic-plastic mechanics and metal science etc.It is believed that the bad flatness of the hot strip is not responsible for the cross breaks formation.The defect results from yield point elongation of the low carbon steel,thus providing a basis for solution of the cross breaks defect.

MECHANISM OF CROSS BREAKS DEFECT FORMATION AND COUNTERMEASURES

ZHU Tao, SONG Ting-feng, ZHOU Bo, SHE Guang-fu

2000, 21(1): 36-39.

Abstract(24) PDF(0)

Abstract:
Based on analysis of applied force,the mechanism of cross breaks defect formation and the relation between operative condition and the defect were investigated in detail.It is believed that uneven residual stress arosen from bad profile in finish rolling is resposible for the cross breaks formation during hot strip uncoilling. Thus,resulting harmfulness from the cross breaks may be diminished or eliminated by controlling profile and optimization of uncoilling operation.

DEVELOPMENT AND APPLICATION OF MOULD POWDER FOR CONTINUOUS CASTING OF ULTRA-LOW CARBON STEEL AT HOME AND ABROAD

ZENG Jian-hua, CHEN Xiao-ping, ZHAO Qi-cheng, ZHANG Yu-dong

2000, 21(1): 40-44.

Abstract(18) PDF(0)

Abstract:
The mechanism of carbon pick-up in strand was destribed when ultra-low carbon steel is cast continuously.The various technical measures taken to prevent the strand from carbon picking up when the mould powder for continuous casting of ultra-low carbon steel was designed and developed at home and abroad and their effectiveness were introduced. The proposals to develop the mould powder for continuous casting of ultra-low carbon steel at PZH Steel were put forward.

OPERATION PRACTICE OF NUT COKE RECOVERY AND MIXED CHARGING FOR PZH STEEL BLAST FURNACE

DIAO Ri-sheng, LIU Shu-fang, YANG Zhi-yuan

2000, 21(1): 45-49.

Abstract(22) PDF(0)

Abstract:
The study and operation practice of ore-nut coke mixed charging of PZH Steel blast furnace were introduced.The existing facilities at Ironmaking Plant of PZH Steel were fully used for the equipment for the nut coke recovery and mixed charging. Therefore,the advantages of the project are a little engineering investment,good returns on the investment,coke saving and cost reduction due to replacement of coke by nut coke,stable operation of blast furnace,high production achieved and beneficial to Ti-V-bearing magnetite smelting.

STUDY OF TECHNOLOGY FOR LADLE AUTOMATIC START-UP OF CASTING AT PZH STEEL

ZHENG Ren-he, HUANG Yuan-mei, LIU Nan-ping, TANG Ping

2000, 21(1): 50-54.

Abstract(18) PDF(0)

Abstract:
Based on information review and laboratory and industrial tests,the steel flow initiator suitable to operation condition at PZH Steel was developed.The percent of automatic start-up of casting was increased from 20%~30% to over 95% for mould casting and from 50% to over 88% for continuous casting.

OPTIMIZATION OF PASS SYSTEM FOR UIC 60kg/m RAIL

TAO Gong-ming, YANG Bing, ZHU Le-yang, YIN Yin-bing, WANG Li

2000, 21(1): 55-58.

Abstract(18) PDF(0)

Abstract:
The UIC 60 kg/m rail is rolled by replacement of 5 passes with 6 passes,thus reducing accidents such as roll breakage,roll ring damage and twisted off roll neck etc. Also,the rolled mark of the rolled piece and the amount of substandard product were reduced.The percent of pass of UIC 60 kg/m rail for export was increased.

PHASE ANALYSIS OF ALUMINIUM IN AD COMBINED DESULPHURIZING AGENT

YANG Ping, LI Ji-chun, ZHOU Guo-ying, FU Quan

2000, 21(1): 59-63.

Abstract(16) PDF(1)

Abstract:
The excessive FeCl₃ solution is added into the analytical sample.The metallic aluminiun (MAl) in the sample is made to oxidizing-reducing react with Fe³⁺ by means of stirring,resulting Al³⁺ coming into solution.The Al₂O₃ doesn't react,retains in the precipitate.After fluorine is removed and calcium,magnesium and iron separated from the Al³⁺ bearing filter liquor,the MAl content is determined with CuSO₄ titrimetry,the MAl content is subtracted from the total Al content,then the Al₂O₃ content is calculated.

HU Ke-jun

2000, 21(1): 64-70.

Abstract(15) PDF(0)

Abstract:

2000 Vol. 21, No. 1