2000 Vol. 21, No. 4

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AN INVESTIGATION ON COAL BLENDING OF INJECTION OF PULVERIZED COAL INTO BLAST FURNACE AT PZH STEEL
WEI Guo, YANG Jun-he, DU He-gui, DIAO Ri-sheng
2000, 21(4): 1-4.
Abstract(47) PDF(1)
Abstract:
To decide on the proper coal blending plan, a combustion experiment with individual and blending coals injected into blast furnace at PZH Steel was carried out in laboratory.It is concluded that coal blending can improve the combustion properties of anthracite coal.Coal blending combination and mixing-ratio have obviously effect upon combustion rate of blending coals.Among the blended coals composted of several coals, better combustion efficiency has been achieved at 40%~50% smoke coal blending rate.Apart from the chemical composition, the microstructure of coal has an effect on combustion efficiency.
AN INDUSTRIAL-SCALE EXPERIMENT UPON INJECTION OF MIXING PULVERIZED COALS INTO BLAST FURNACE AT PZH STEEL
LI Zhen-cai, ZHANG Wen-xin, RAO Jia-ting, FAN Yun-dong, ZHONG Yu-ming, WANG Hua
2000, 21(4): 5-8.
Abstract(42) PDF(0)
Abstract:
Physical chemistry properties of various mixing coals in Panxi area has been measured and the industrial-scale experiment on injection of mixing pulverized coals into blast furnace has been carried out in PZH Steel.Burden ratio of lean coal is increased gradually from 10% to 25% with the result of 113.81kg/tFe coal ratio.Coal ratio of 139.14 kg/tFe has been reached with an average mixing ratio of 35.00% lean coal in the first half year of 2000.
DEVELOPMENT AND APPLICATION OF MOLD POWDER TO CONTINUOUS CASTING OF LOW ALLOY STEEL
CENG Jian-hua, CHEN Tian-ming, ZHAO Qi-cheng, ZHANG Jun-xiang, XIAO Ming-fu
2000, 21(4): 9-14.
Abstract(47) PDF(0)
Abstract:
In accordance with the problems on the production of continuous casting of low alloy steel at PZH Steel and based on the research upon effect of RE oxide(RExOy) on the properties of mold powder and the reaction of RE elements to melting slag,mold powder with strong ability of absorption and solution of RExOy and non-reaction to RE elements was developed through the choice of raw materials and the effect of fluxes on the properties of mold powder.From industrial scale experiment it is concluded that the developed mold powder has met with good results,such as the rate without slab surface finishing>90%,excellent lubrication and lower breakout rate.
STUDY ON HOT METAL DESULFURIZATION WITH MAGNESIUM PACKED WIRE
TANG Ping, WEN Guang-hua, XIONG Yin-cheng, ZHU Bin, LONG Yi-ju, ZHAO Zhi-xiang, HE Hong-xia
2000, 21(4): 15-17.
Abstract(56) PDF(2)
Abstract:
A trial on pretreatment process of hot metal desulfurization with magnesium packed wire was carried out in the laboratory.It is conclude that the rational desulfurizing agent composition,proper bath depth,good diffusion in the bath and low oxygen content in hot metal play a key role in improving the utilization and desulfurization efficiency of magnesium.
STUDY ON THE RECOVERY OF HIGH PURITY IRON OXIDE FROM PICKLING WASTE LIQUOR OF STEEL SHEET
HE Ming-xing, HE An-xi, CHEN Xiu-yun, XU Nan-nan
2000, 21(4): 18-22.
Abstract(72) PDF(1)
Abstract:
A process of removing impurity from pickling waste liquor had been developed.Effects of the technological parameters,such as amount of additive iron powder,reaction temperature,stirring rate,oxidizing time etc,on reaction rate and efficiency of removing impurity are researched for the optimum technological parameters.
A STUDY OF PREPARATION OF BARIUM-TITANATE POWDER WITH H2TiO3
LIU Min, WANG Kai-yi, CAI Hong-bin
2000, 21(4): 23-27.
Abstract(54) PDF(0)
Abstract:
A process of preparing barium-titanate powder with H2TiO3 by means of precipitating method is developed.Effects of burden ratio,amount of precipitant,reaction temperature and time,calcination temperature and time on quality of products are investigated.
ANALYSIS OF RAIL HEAD DEFORMATION CAUSED BY STRAIGHTENING
GUO Hua, CHEN Ya-ping, WANG Li, TAO Gong-ming
2000, 21(4): 28-33.
Abstract(51) PDF(2)
Abstract:
According to different deformation rates in various parts of rail head after rail straightening,stress and bending moment were analyzed in the process of rail straightening by means of the mechanics of materials and elasticity.Meanwhile the result of simulation test on three-point bending of rail in laboratory was discussed and the initial reasons of inhomogeneous deformation of rail head and surface deformation in the process of rail straightening had been found out.
STATE OF THE ARTS OF DEOXIDIZING PROCESS AND PROPOSAL FOR IMPROVING DEOXIDIZING PROCESS AT PZH STEEL
HAN Nai-chuan, YANG Su-bo, WEN Yong-cai, ZHANG Da-de, WANG Sheng
2000, 21(4): 34-38.
Abstract(56) PDF(0)
Abstract:
Development on deoxidizing technique in steelmaking process and State of the arts of deoxidizing technique in steelmaking process at PZH Steel are introduced.Deoxidizing techniques and deoxidizers in the process of steelmaking are reviewed and a proposal for the development on deoxidizing process at PZH Steel is presented.
EFFECT OF CASTING FACTORS IN CONTINUOUS CASTING PROCESS ON “CAVITY” DEFECT OF COLD ROLLED SHEET
FANG Shu-fang, ZHOU Yu, TAN Fei, ZHONG Sheng, WANG Zheng, LI Zhong-chao
2000, 21(4): 39-43.
Abstract(43) PDF(0)
Abstract:
Effect of casting factors in continuous casting process on “cavity” defect of cold rolled sheet is investigated.It is concluded that longer ladle casting time (≥16 min) will obviously increase the “cavity” defect rate in the cold rolled products.Under open casting,if various anomalous operation factors act at same time,the amount of inclusion in continuous cast slab will be increased to form more “cavity” defects in the products.
EXPERIMENT ON Fe-Al-Mn DEOXIDIZING AND ALLOYING OF LOW-CARBON ALUMINIUM KILLED STEEL
TANG Tian-yu, LUAN Qiu-sheng, WEN Yong-cai, WANG Sheng, ZHANG Huai, CHEN Shou-jun
2000, 21(4): 44-49.
Abstract(47) PDF(0)
Abstract:
The feasibility of producing quality cold rolled sheets through deoxidizing and alloying with Fe-Al-Mn alloy and a process of producing low-carbon aluminium killed steel through deoxidizing and alloying are introduced.Yield of smelting low-carbon aluminium killed steel is increased from 85% up to 99% and more.Meanwhile,the surface quality of cold rolled sheet is improved obviously.
APPLICATION OF SINGLE-LAYER LONG BRICK TO CONVERTER AT PZH STEEL
XIONG Kai-wei, WANG Er-jun, YANG Sen-xiang, WANG Jian, GE Wen-sun
2000, 21(4): 50-54.
Abstract(56) PDF(0)
Abstract:
the application of single-layer long brick to converter at PZH Steel is introduced.It is concluded that the proper and uniform lining erosion is obtained and base furnace life is increased largely after the application of single-layer long bricks,which provides steadily base practice for slag splashing lining protection.Meanwhile,the ratio of converter capacity is increased,which provides the favorable conditions for increments of converter volume and output.
RESEARCH AND APPLICATION OF COMPOSITE SLAGGING FLUX IN STEELMAKING PROCESS AT PZH STEEL
LUAN Qiu-sheng, WEN Yong-cai, TANG Tian-yu, YANG Sen-xiang, WANG Er-jun, CHEN Kun
2000, 21(4): 55-58.
Abstract(50) PDF(0)
Abstract:
A trial of composite slagging process was carried out according to the new features and problems on the desulphurization process of hot metal outside converter and slagging with active lime at PZH Steel.As a result the shorter primary slag-forming time and smooth smelting operation and excellent results had been achieved.
APPLICATION OF COLD ROLLED SHEET PRODUCED AT PZH STEEL TO HOUSEHOLD APPLIANCES
ZHENG Zhi-wang, YU Meng-wen, CHEN Su-kun
2000, 21(4): 59-63.
Abstract(62) PDF(0)
Abstract:
Technology and installations for the production of cold rolled sheet at PZH Steel were introduced.Application of cold rolled sheet produced at PZH Steel to household appliances at present and in the future had been discussed.
MODERNIZATION OF MOLD VIBRATION MEASURING SYSTEM ON QUICK MAINTENANCE PLATFORM IN CONTINUOUS CASTING
LIU Jin-wu, MA Ping-an, HUANG Yuan-mei, LUO Zai-xiang, ZHAO You-jun
2000, 21(4): 64-68.
Abstract(44) PDF(0)
Abstract:
Based on the problems of mold vibration measuring system on quick maintenance platform in continuous casting, the measuring system was modernized.The installation system runs smoothly so that the perfect functions and reliable measuring data have been obtained since that.As the maintenance conditions were improved, the longer service life of maintenance platform, shorter service time, low equipment fault rate and breakout in the production had been achieved.It provides the good conditions for high performance continuous casting.
DU Hou-yi
2000, 21(4): 69-70.
Abstract(41) PDF(0)
Abstract:

Address：Editorial Department of Iron Vanadium Titanium Steel, Technology Development Research Center, Research Institute of Panzhihua Group Co., Ltd., No. 90 Taoyuan Street, East District, Panzhihua City, Sichuan Province (617000)

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